Envent Engineering Ltd. Hydrogen Sulfide Analyzer Model 330S & 331S Model 330SDS & 331SDS

Transcription

1 Envent Engineering Ltd. Hydrogen Sulfide Analyzer Model 330S & 331S Model 330SDS & 331SDS User's Manual Revision 2.1 Dec 2017

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3 Table of Content INTRODUCTION... 1 Contacting Envent Engineering Ltd... 1 Canada Office: (Main)... 1 USA Office:... 1 China Office:... 1 Warranty & Liability Statements... 2 Limitation of Warranty... 2 Disclaimer... 2 Warnings & Cautions... 3 Warning & Cautions for 330S & 331S H 2 S Analyzers... 3 Warning & Cautions for 330S Analyzer Only... 4 Warning & Cautions for 331S H 2 S Analyzer Only... 5 Analyzer Certifications: Area Classification... 5 Certification under CSA Standards Mark# MC Products... 5 Applicable Requirements... 6 Certification under CSA Standards ETL Mark# Products... 7 Applicable Requirements... 8 Analyzer Specifications... 8 Key Symbols PRINCIPLE OF OPERATION Physical Reaction Analysis Cycles Dual Sensor Analysis cycle (SDS): ANALYZER COMPONENTS Controller Board Power Connection Solenoid Output Drivers & Furnace Output Dry Contact Relays Analog Outputs Digital Inputs Serial Ports & I2C... 18

4 LCD Display Board Sample Chamber Sensor Block Window & Gasket Aperture Strip Trigger Slide Sample flow Components Flowmeter Humidifier Unit Eductor Block Sample Conditioning System Filter Housing, Pressure Regulator, & Pressure Gauge (Conventional) Filter Housing Pressure Regulator Pressure Gauge Three-way valve Sweep Needle Valve Envent IFR Filter Housing, Regulator, & Pressure Gauge (Alternative) Pressure Regulator and Filter Housing Pressure Gauge Three-way valve Sweep Needle Valve Optional Components Low H 2 S sensing Tape Sensor Low Pressure Switch Power AO Boards Ethernet Communication Card INSTALLATION Installation Requirements Electrical Requirements Location for the System Space Requirements Sample Point Selection Sample inlet & sample sweep... 33

5 Vent line Sample Volume & Flow Rate Receiving the Analyzer Unpacking the Analyzer Standard spare parts for 330S H 2 S analyzers: Standard spare parts for 331S H 2 S analyzers: Installation procedure & Start-up OPERATION & CONFIGURATION Analyzer Display Interface Analyzer ICE Software Interface Introduction to the 330S/331S ICE Software Safety Guidelines Using the ICE Software Connecting the Analyzer to a Computer Using the ICE Software Modify analyzer's Configuration Discrete Input Configuration Analog & Discrete Output Configuration Alarm Configuration Archive Setup Configuration Retrieve Archives from the Analyzer Display Configuration CALIBRATION PROCEDURES H 2 S Gas Calibration Re-zero Sensor Procedure MAINTENANCE H 2 S Sensing Tape Change Procedure Sample Conditioning System Cleaning Procedure Material List Procedure TROUBLESHOOTING APPENDICES Modbus Registry Recommended Spare Parts List Chico A Sealing Compound: For sealing fittings in Hazardous Locations... 71

6 Safety Data Sheet for H 2 S Sensing Tape Risk Assessment - Safety Information List of Figures Figure 1. H 2 S Analyzer Principle of Operation Diagram Figure 2. H 2 S Analysis Cycle Figure 3. H 2 S Controller Board Front View (Customer Connections) Figure 4. Relay & Solenoid Outputs Figure 5. AO 4-20 ma Output Wiring Options Figure 6. RS-232 Serial Port wired to a Mini USB Female Connector Figure S & 331S H 2 S Analyzer Graphic Display Figure 8. Sample Chamber (Exploded View) Figure 9. Trigger Slide Installed on a 330S H2S Analyzer (Applicable for 331S Analyzers) Figure 10. Envent's Humidifier Unit for 330S & 331S Figure 11. Humidifier Unit Installed in a 331S H 2 S Analyzer Figure 12. Eductor Block (Venturi Effect) Figure 13. PI&D Diagram of Standard Sample System for 330S & 331S H 2 S Analyzers Figure 14. Conventional Standard Sample System Figure 15. Alternative Standard Sample System Figure 16. Low H 2 S Sensing Tape Sensor Figure 17. Internal & External Pressure Switches Figure 18. Analog Output Board Figure 19. Ethernet Communication Card Figure 20. Space Requirements for the 330S & 331S H 2 S Analyzers Figure S Recommended Venting for 331S (Same as the 330S H 2 S Analyzer) Figure S Display (left) & 331S Display (right) Figure 23. ICE Software: Enable Communication Figure 24. ICE Software: Configuration: System IO Tab: Inputs Tab Figure 25. ICE Software: Configuration: System IO Tab: Outputs Tab Figure 26. ICE Software: Configuration: Alarms Tab Figure 27. ICE Software: Adding Variable as an Alarm... 46

7 Figure 28. ICE Software: New Alarm Set-up Figure 29. ICE Software: Configuration: Archive Setup Tab Figure 30. ICE Software: Reports: Archives Tab Figure 31. ICE Software: Configuration: Display Tab Figure S & 331SDS H 2 S Sensing Tape Change Procedure (Applicable for 330S & 330SDS Analyzers) List of Tables Table S/331S H2S Analyzer Specifications... 9 Table 2. Aperture Strips & Ranges Table 3. Sample Volume and & Flow Rate Table 4. Display Button Description/Function Table 5. Display LED Description/Function Table 6. Hydrogen Sulfide Properties Table 7. Hydrogen Sulfide Quantities & Health Effects... 77

8 INTRODUCTION This manual provides all the necessary information to install, operate and maintain the 330S, 330SDS, 331S and 331SDS model H 2 S Analyzer units. This manual is intended for all technical level users. Throughout this document will be referring to the models 330S and 331S. However, the information applies equally to the 330SDS and 3301SDS (Dual sensor), unless otherwise stated. To clarify, the difference between an "S" model and a "SDS" model analyzer is the second sensor the "SDS" has to measure H 2 S giving it the capability to measure H 2 S from two different samples at the same time; the DS stands for Dual Sensor. The Envent 330S/331S H 2 S Analyzer is a uniquely rugged and simple design that utilizes lead acetate based detection which provides a linear and interference-free output of H 2 S concentration. This analyzer can measure a wide range of hydrogen sulfide concentrations from parts per billion (ppb) concentrations to parts per million (ppm) concentrations. With the addition of a dilution sample system, it can read high concentrations in percentage up to 100%. There are other options available such as the sample system for H 2 S analysis in liquids or the addition of a hydrogen reaction furnace for total sulfur measurements. Contacting Envent Engineering Ltd This manual covers most of the important information the user is going to need to install, operate and maintain the 330S/331S H 2 S Analyzers. If more information is required, you can contact us at: Canada Office: (Main) Toll Free: 1 (877) Tel: (403) Fax: (403) info@envent-eng.com Hours of operation: Monday to Friday From 8:00 am to 4:30 pm (Mountain Time Zone). Offices closed on statutory holidays. USA Office: Tel: 1 (713) China Office: Tel: (86) For further information on our products and most updated manuals/product catalog please visit: Envent Engineering Ltd. Page 1 Revision 2.1

9 Warranty & Liability Statements Products manufactured and supplied by Envent Engineering Ltd unless otherwise stated are warranted against defects in materials and workmanship for up to 18 months from the date of shipment or 12 months from date of start-up, whichever occurs first. During the warranty period the manufacturer will, as its option, either repair or replace products, which prove to be defective. The manufacturer or its representative can provide warranty service at the buyer's facility only upon prior agreement. In all cases the buyer has the option of returning the product for warranty service to a facility designated by the manufacturer or its representatives. The buyer shall prepay shipping charges for products returned to a service facility, and the manufacturer or its representatives shall pay for return of the products to the buyer. The buyer may also be required to pay round-trip travel expenses and labour charges at prevailing labour rates if warranty is disqualified for reasons listed below. Limitation of Warranty The foregoing warranty shall not apply to defects arising from: Improper or inadequate maintenance by the user; Improper or inadequate unpacking or site preparation/installation; Unauthorized modification or misuse; Operation of the product in unfavorable environments, especially high temperature and/or high humidity; Corrosive or other damaging atmospheres or otherwise outside published specifications of analyzer. Envent Engineering Ltd carries no responsibility for damage cause by transportation or unpacking, unless otherwise specified in the incoterms. Extended warranty may be available with certified start-up. Contact Envent Engineering Ltd for details. Envent Engineering Ltd reserves the right to change the product design and specifications at any time without prior notice. Disclaimer No other warranty is expressed or implied. The manufacturer specially disclaims the implied warranties of merchantability and fitness for a particular purpose. The sole remedy of the buyer shall in no case exceed the purchase price of the analyzer. Envent Engineering Ltd. Page 2 Revision 2.1

10 The manufacturer shall not be liable for personal injury or property damage suffered in servicing the product. The product should not be modified or repaired in a manner at variance with procedures established by the manufacturer. Warnings & Cautions This section covers all warnings and cautions for the 330S and 331S H 2 S analyzers. They are divided into warnings and cautions applicable to both the 330S and 331S, only 330S, and only 331S H 2 S analyzers. Please read and understand all statements as they are for your own safety when installing, operating and maintaining the analyzer(s). Some of these statements are also noted throughout the manual when relevant. Warning & Cautions for 330S & 331S H 2 S Analyzers Do not disconnect equipment unless power has been switched off or area is known to be non-hazardous. Turn off power before servicing. Ensure breakers are off before connecting or disconnecting power supply. Electrostatic Hazard Backpan and Certification nameplate must be cleaned only with a damp cloth to prevent static charging hazard. Hydrogen Sulfide and/or other hazardous gases may be present under normal operation proper precaution and protective equipment is advised. Please refer to "Risk Assessment - Safety Information" on page 77 for more information. The analyzers input voltage range shown in Certification Nameplate (e.g., VAC) is limited when installing external devices (e.g., Solenoids). Incorrect configuration of the analyzer may cause incorrect operation. Injury and/or damage to facilities may occur. Check analyzer's functionality after configuration changes have been made. Total Sulfur Furnace reaches a temperature of up to 900 C internally after 1 hour on. Do not touch external surface as it can reach up to 150 C. Allow enclosure 1 hour after powering down the analyzer to cool down before servicing. The analyzer should be mounted in an area in which it is not exposed to vibration, excessive pressure, temperature and/or environmental variations. Disassembly of the pressure regulator and solenoids in the field is not advised. Consult Envent Engineering Ltd if the regulator or solenoid appears contaminated. Envent Engineering Ltd. Page 3 Revision 2.1

11 Before resuming line pressure, be sure that all port connections, sample sweep and sample conditioning system are securely installed. All connections must be leaktight to ensure the effectiveness of the analyzer as well as safety. The user is solely responsible for the product selection, safety and warning requirements for the application. If the equipment is used in a manner not specified by Envent Engineering Ltd, the protection provided by the equipment may be impaired. Do not use solvents, brake cleaners, soaps, detergents or rubbing alcohol to clean up analyzer or sample system. This unit requires a disconnect device rated 24 VDC and 5A max. It must be protected by a circuit breaker rated 24 VDC and 5A max, and it is to be installed in accordance with local electrical codes. This unit requires a disconnect device rated 240 VDC and 5A max. It must be protected by a circuit breaker rated 240 VDC and 5A max, and it is to be installed in accordance with local electrical codes. Envent Engineering H 2 S Sensing Tapes are suitalbe for use, if stored in the original sealed package, for 10 years fron date of manufacture. Tapes should be stored in a coll dry location. If the seal on the package has been broken in storage, the H 2 S Sensing Tape should be discarded. Warning & Cautions for 330S Analyzer Only Substitution of components may impair intrinsic safety and suitability for Class I, Division 1. Open circuit before removing cover. Ensure that the analyzer received is suitable for the electrical classification of the installation site: The 330S is designed for Class I, division 1 Groups CD or Groups BCD (Check Analyzer Nameplate) The glass window on the XP enclosure must remain installed in order to maintain area classification. Seals not poured. Pour seals before energizing the circuit (See "Chico A Sealing Compound: For sealing fittings in Hazardous Locations" on page 71 for further details). Analyzer may utilize an optional CCS, Model 646 Series pressure switch located on the side of the XP enclosure: Dual seal, MWP 500psi Envent Engineering Ltd. Page 4 Revision 2.1

12 Annunciation is visible leakage from the pressure adjustment cover (flow from this cover can indicate the possibility that a failed primary seal condition could exist in the pressure switch). Warning & Cautions for 331S H 2 S Analyzer Only Substitution of components may impair suitability for Class I, Division 2. The eductor is required with this model in order to maintain electrical safety and certification in division 2 areas. Analyzer Certifications: Area Classification All H 2 S analyzers sold until Feb 29 th, 2016 are Certified under CSA standards CSA Mark # MC All H 2 S analyzers sold from March 01 st, 2016 are certified to CSA standards under the ETL Mark # Certification under CSA Standards Mark# MC Products CLASS PROCESS CONTROL EQUIPMENT For Hazardous Locations Class I, Division 1, Group B, C & D: Model 330, 330S and 330SDS H 2 S Analyzer, rated VDC or VAC 50/60Hz, 5A Max. Temperature Code T3C; Ambient Temperature Range 0 C + 50 C. Dual Seal MWP 2 PSI. Class I, Division 1, Group B, C & D: Model 330, 330S, 330SDS Total Sulfur Analyzer, rated VDC or VAC 50/60Hz, 5 A Max. Temperature Code T3C; Ambient Temperature 0 C + 50 C. Dual Seal MWP 2 PSI. Class I, Division 2, Group A, B, C & D: Model 331, 331S and 331SDS H 2 S Analyzer, rated VDC or VAC 50/60Hz, 5A Max. Temperature Code T3C; Ambient Temperature Range 0 C + 50 C. Envent Engineering Ltd. Page 5 Revision 2.1

13 Class I, Division 2, Group B, C & D: Model 331, 331S, 331SDS Total Sulfur Analyzer, rated VDC or VAC 50/60Hz, 5 A Max. Temperature Code T3C; Ambient Temperature 0 C + 50 C. CLASS PROCESS CONTROL EQUIPMENT For Hazardous Locations Certified to US Standards Class I, Division 1, Group B, C & D: Model 330, 330S and 330SDS H 2 S Analyzer, rated VDC or VAC 50/60Hz, 5A Max. Temperature Code T3C; Ambient Temperature Range 0 C + 50 C Class I, Division 1, Group B, C & D: Model 330, 330S, 330SDS Total Sulfur Analyzer, rated VDC or VAC 50/60Hz, 5 A Max. Temperature Code T3C; Ambient Temperature 0 C + 50 C Class I, Division 2, Group A, B, C & D: Model 331, 331S and 331SDS H 2 S Analyzer, rated VDC or VAC 50/60Hz, 5A Max. Temperature Code T3C; Ambient Temperature Range 0 C + 50 C Class I, Division 2, Group B, C & D: Model 331, 331S, 331SDS Total Sulfur Analyzer, rated VDC or VAC 50/60Hz, 5 A Max. Temperature Code T3C; Ambient Temperature 0 C + 50 C Applicable Requirements CSA Standard C22.2 No General Requirements Canadian Electrical Code Part II. CSA Standard C22.2 No.0.4-M2004 Bonding of Electrical Equipment CSA Standard C22.2 No.30-M1986 Explosion-Proof Enclosure for Use in Class I Hazardous Locations. CSA Standard C22.2 No.142-M1987 Process Control Equipment CSA Standard C22.2 No.157-M1992 Intrinsically Safe and Non-Incendive Equipment for Use in Hazardous Locations Envent Engineering Ltd. Page 6 Revision 2.1

14 CSA Standard C22.2 No. 213-M1987 Non-Incendive Electrical Equipment for Use in Class I, Division 2 Hazardous Locations ANSI-ISA Requirements for Process Sealing Between Electrical Systems and Flammable or Combustible Process Fluids UL Standard 508, Seventeenth Edition Industrial Control Equipment. UL Standard 913, Seventh Edition Intrinsically Safe Apparatus and Associated Apparatus for use in Class I, II, III, Division 1, Hazardous (Classified) Locations ANSI-ISA Non-Incendive Electrical Equipment for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations UL Standard 1203, Fourth Edition Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations Certification under CSA Standards ETL Mark# Products Process Gas Analyzer certified for Canadian Standards: 330, 330S, and 330SDS - H 2 S Analyzer, Class I, Division 1, Groups BCD. Dual Seal, MWP 2 PSI Notes: 1) Equipment is only acceptable for use in Class I, Division 1, Groups C and D when provisioned with Model XFA2 Pressure Switch 2) The Dual Seal MWP rating is applicable to the Sample Gas pressure present at the Heating Chamber Assembly. Models may have an optional pressure sensor installed which is separately identified as being Dual Seal, MWP 500 PSI 330, 330S, and 330SDS - Total Sulphur Analyzer, Class I, Division 1, Groups BCD. Dual Seal, MWP 2 PSI Note: The Dual Seal MWP rating is applicable to the Sample Gas pressure present at the Heating Chamber Assembly. Models may have an optional pressure sensor installed which is separately identified as being Dual Seal, MWP 500 PSI 331, 331S and 331SDS H 2 S Analyzer, Class I, Division 2, Groups A, B, C and D. 331, 331S and 331SDS Total Sulphur Analyzer, Class I, Division 2, Groups A, B, C and D Envent Engineering Ltd. Page 7 Revision 2.1

15 Process Gas Analyzer certified for US Standards: 330, 330S, and 330SDS - H 2 S Analyzer, Class I, Division 1, Groups BCD. Note: Equipment is only acceptable for use in Class I, Division 1, Groups C and D when provisioned with Model XFA2 Pressure Switch 330, 330S, and 330SDS - Total Sulphur Analyzer, Class I, Division 1, Groups BCD 331, 331S, and 331SDS - H 2 S Analyzer, Class I, Division 2, Groups ABCD. 331, 331S, and 331SDS - Total Sulphur Analyzer, Class I, Division 2, Groups BCD Temperature code (all products): T3C Ambient Temperature Range (all products): 0 C to 50 C Applicable Requirements - Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use Part 1: General Requirements [UL :2012 Ed.3+R:29Apr2016] - Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use Part 1: General Requirements (R2017) [CSA C22.2# :2012 Ed.3+U1;U2] - Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use - Part 2-201: Particular Requirements For Control Equipment [UL :2014 Ed.1] - Safety Requirements For Electrical Equipment For Measurement, Control, And Laboratory Use - Part 2-201: Particular Requirements For Control Equipment [CSA/IEC :2014 Ed.1] - Intrinsically Safe And Non-Incendive Equipment For Use In Hazardous Locations (R2016) [CSA C22.2#157:1992 Ed.3+G1;U2] - Nonincendive Electrical Equipment For Use In Class I And II, Division 2 And Class III, Divisions 1 And 2 Hazardous (Classified) Locations [CSA C22.2#213:2016 Ed.2] - Explosion-Proof Enclosures For Use In Class I Hazardous Locations (R2016) [CSA C22.2#30:1986 Ed.3+G1;G2] - ISA Issued: 2011/01/01 Requirements for Process Sealing Between Electrical Systems and Flammable or Combustible Process Fluids - UL 913 Issue:2006 Ed.7+R:23-Sep-2011 Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division I, Hazardous (Classified) Locations - Nonincendive Electrical Equipment For Use In Class I And II, Division 2 And Class III, Divisions 1 And 2 Hazardous (Classified) Locations [ISA :2016 Ed.7] - Standard For Explosion-Proof And Dust-Ignition-Proof Electrical Equipment For Use In Hazardous (Classified) Locations [UL 1203:2013 Ed.5 +R:16Oct2015] Envent Engineering Ltd. Page 8 Revision 2.1

16 Analyzer Specifications Analyzer Specification Measurement Method ASTM D : Standard Test Method for Analysis of Hydrogen Sulfide in Gaseous Fuels (Lead Acetate Reaction Rate Method) Ambient Temperature 0-50 C (standard) consult factory for other requirements, 0 to 90% humidity (noncondensing) Power less than 3W Or, VAC 50/60 Hz, 5W, (300W when total sulfur option is included) Fuse Rating: 5 Amps, 250V, Slow blow, Size: 0.201'' Dia x 0.787'', Package/Case: 5 mm x 20 mm Battery (for 1d Controller Board only): Lithium 3.6V, Dia 0.571'' & 0.992'' Long Electrical 330S-DS Class I, Division 1 Groups B C D Certification 331S-DS Class I, Division 2 Groups A B C D Certified to CSA standards under the CSA Mark # MC (H 2 S Analyzers sold up to Feb 29, 2016) Certified to CSA standards under the ETL Mark # (H 2 S Analyzers sold from March 01, 2016) Output Ranges Standard ranges are between ppb and ppm Response Time 20 seconds to 90% of step change Accuracy ±1.5% of full range on channel 1 (for SDS Models, channel 2 has an accuracy of ± 2.0%). For dilution (option): ±2.5% For Total Sulfur (Option): ±2.0% For PPB (Option): Based on "base noise average" Display Graphic Liquid Crystal Display; menu is scrolled by internal button or magnetic wand (330S) Outputs Two 4-20mA outputs (loop power required), optional 4-20mA powered output boards are available Serial Communication: (1) RS-232 Modbus protocol (3) RS-485 Modbus protocol (One RS-485 for remote display option) Ethernet port as an optional feature 4 SPDT relays (120 VAC 5A maximum) 4 solid state solenoid drivers Optional Features Total Sulfur Utilized when all sulfur compounds need to be measured. A Total sulfur reaction furnace is added which allows the analyzer to measure total sulfur Dilution Sample System Utilized when the analyzer needs to measure ranges above 100 ppm. A permeable membrane dilution system Liquid Sampling Utilized when a liquid sample conditioning system is required to measure hydrogen sulfide in Liquids Parts Per Billion Utilized when analyzer requires to read in parts per billion (<1 ppm) Low Tape Sensor Utilized when an alarms is required when the H 2 S sensing tape needs to be changed Low Pressure Utilized for alarming when sample pressure drops below 10 PSI Switch AO Powered Boards Utilized for loop-powered analog outputs Expander AO Board Utilized when more than two analog outputs are required Ethernet Port Auto Calibration Utilized for TCP/IP communication capabilities Utilized to initiate a calibration based on time of day or manually Table S/331S H2S Analyzer Specifications Envent Engineering Ltd. Page 9 Revision 2.1

17 Key Symbols The following symbols are used throughout this manual. They are intended to draw attention to important information. Description of hazards that could result in major injury or death. Description of hazards that could result in minor injury or property damage. Description of important information regarding safety of personal and/or property. Description of useful information to help understand a concept. Caution: hot surface. Envent Engineering Ltd. Page 10 Revision 2.1

18 PRINCIPLE OF OPERATION Physical Reaction Envent's models 330S and 331S H 2 S analyzers use ASTM D : Standard Test Method for analysis of hydrogen sulfide in gaseous fuels (Lead Acetate reaction rate method). This method uses lead acetate impregnated paper. Throughout this document the term lead acetate tape will be written as "H 2 S sensing tape". Refer to "Safety Data Sheet for H 2 S Sensing Tape" on page 72 for safety information on the H 2 S sensing tape. The H 2 S sensing tape reacts when in contact with hydrogen sulfide by the compound relationship shown below. This tape does not react to any other sulfur compounds in the gas stream. This makes it free from interference when more than one sulfur compound is present in the sample stream. The H 2 S reaction is visibly evident by a brown stain directly on the H 2 S sensing tape. H 2 O H 2S + Pb( CH 3COO ) 2 PbS + 2CH 3 COOH The electronics built into the models 330S and 331S have been programmed to measure the rate of darkening over time which, in turn, gives the hydrogen sulfide concentration level. When no H 2 S is in contact with the H 2 S sensing tape, the analyzer sensor reads 1000 mv (+/- 100 mv). The sensor block has a LED and a photodiode detector. The LED emits a red beam of light which is reflected off of the H 2 S sensing tape to the photodiode which detects the light intensity. The darker the H 2 S sensing tape becomes when in contact to H 2 S, the less light the photodiode detector receives reducing the millivolt value, which in turn, increases the H 2 S value. The "SDS" models uniquely measures rate of change on both sides of the H 2 S sensing tape, allowing for simultaneous readings of two separate samples. Envent Engineering Ltd. Page 11 Revision 2.1

19 Figure 1. H 2 S Analyzer Principle of Operation Diagram Figure 1 above shows a flow and pressure regulated of a filtered sample gas passing through the humidifier into the sample chamber. An aperture in the sample chamber, which differs in sizes depending on the application, allows the gas to come in contact with the H 2 S sensing tape creating a brown stain. Flow and pressure are the most important variables when measuring H 2 S and must be kept at a constant state for the analyzer to measure H 2 S properly. Pressure should be kept at a constant 15 psig. The lowest pressure found to be tolerable for proper H 2 S measurement is 0.5 psig. Flow must be kept at a constant flow of 2 cm (83.63 cc/min). A change in flow of +/- 1 cm affects the reading by 10% of full range. Analysis Cycles The analysis of the color rate of change on the H 2 S sensing tape is measured in analysis cycles. An analysis Cycle lasts up to a maximum of 720 seconds (12 minutes). Do not change the Maximum Analysis Time, consult Envent Engineering Ltd. Analyzers sold prior to Mid-August 2016 are set to have a 360 second analysis cycle. Envent Engineering Ltd. Page 12 Revision 2.1

20 Once an analysis cycle is complete, the motor moves the H 2 S sensing tape giving the sensor block new tape surface area to start the analysis again. In normal operation, if the analyzer is being exposed to H 2 S within its range, the analysis cycle should last between 150 to 210 seconds (1.5 to 2.5 min); the cycle lasts 720 seconds if no H 2 S is present. Figure 2. H 2 S Analysis Cycle Figure 2 shows a complete analysis cycle from when the motor has advanced the H 2 S sensing tape from a previous analysis (1), to the end of the current analysis (4). Once the H 2 S sensing tape has finished moving and new tape surface area is exposed, the reflection of light from the LED to the photodiode detector is at its maximum and results in a voltage output from the sensor block of 1000 mv (+/- 100 mv). This voltage is captured by the analyzer and it is referred to as the "Zero Voltage". The zero voltage will vary for each surface area of the H 2 S sensing tape and will represent the starting point for the H 2 S reading for that cycle. From stage (2) to (4) the H 2 S value starts increasing as the millivolt value drops from exposure to H 2 S. This stage is called "RRA Analysis". The RRA stands for Rapid Response Algorithm and it is the instantaneous H 2 S readings calculated every 67 ms. As the H 2 S sensing tape darkens, the RRA value starts going up every second. Although the RRA values are calculated almost instantaneously, they are not as accurate as the final reading obtained at the "Concentration Calculation" stage (3) to (4). However, RRA values can be used as a trigger alarms setpoint in case the application requires a rapid response time (less than the RRA Analysis completion). The first part of the RRA Analysis (2) to (3) Envent Engineering Ltd. Page 13 Revision 2.1

21 completes when the mv value drops 100 mv. Once it drops 100 mv, stage (3) to (4) "Concentration Calculation" starts. On this stage, the H 2 S slope is optimal for calculating the final H 2 S value for that Cycle. Algorithms are used by the controller board to calculate as accurately as possible the H 2 S final value. Once the final value is obtained, it will stay at that value (shown in the display and 4-20 ma analog outputs) until the next cycle has finished and updates the H 2 S current reading. This stage will always be 1/5 of the amount of time it takes stage (2) to (3) to complete. Thus, if stage (2) to (3) took 600 seconds, then stage (3) to (4) will take 120 seconds. It is important that the analyzer is used for its calibrated H 2 S range. Do not use this unit for an application that will require readings outside of its calibrated range. This will cause the H 2 S sensing tape to run out faster and may cause less accurate readings. The range is determined by the aperture strip in the sample chamber. For more information analyzer ranges, refer to "Aperture Strip" on page 20. Dual Sensor Analysis cycle (SDS): Dual sensor analyzers have two sensors that read H 2 S from two different samples at the same time, e.g. Sensor 1: 0-20 ppm H 2 S Sensor 2: ppm H 2 S. The analysis cycle process is the same per sensor as explained earlier in this section; however, some extra algorithms have been implementing to help with the interaction between the two sensors and their analysis cycles' timing. Both analysis cycles for each sensor will always start at the same time. When the motor moves and new H 2 S sensing tape area is exposed, a new analysis cycle has started for both sensors. However, the analysis cycles from each sensor will finish at different times. Either sensor 1 or sensor 2 will finish its analysis cycle first. Regardless of which sensor finishes first, it will wait for the other sensor to complete its analysis cycle. Once both sensors have completed their analysis cycles, the motor will move and new H2S sensing tape area is exposed for a new analysis cycle. It is important to clarify that when the first sensor has finished its analysis cycle, even when it is waiting for the second sensor to complete its analysis cycle, it immediately updates any outputs associated with that sensor (Analog output 4-20 ma, alarms, display H2S value, etc.). Envent Engineering Ltd. Page 14 Revision 2.1

22 ANALYZER COMPONENTS In this section, the main components of the 330S/331S H 2 S analyzer will be covered as well as the optional components added to the system at customer request. A brief explanation of type, functionality, set up and options will be described. Total Sulfur and Dilution system options will not be covered in this section. Please refer to Total Sulfur and Dilution manuals. Controller Board The H 2 S controller board is the most important electronic component of the analyzer. It is a printed circuit board that holds all of the customer's connections such as, communication ports, digital inputs, analog outputs, relay outputs solenoid outputs, and AC or DC power input. Refer to Figure 3. Figure 3. H 2 S Controller Board Front View (Customer Connections) Power Connection There are AC or DC H 2 S controller boards and will be specified by customer request. The controller board with an AC power supply has an input voltage range from 110 to 240 VAC (50-60 Hz) and the controller board with a DC power supply has an input voltage range from 10 to 32 VDC. Refer to Figure 3. Envent Engineering Ltd. Page 15 Revision 2.1

23 Solenoid Output Drivers & Furnace Output The H 2 S controller board has four solenoid driver outputs. They operate at the same voltage used to power the controller board and are used to directly drive solenoids for shutdown, auto-calibration, stream switching, etc. The connection F1-F1 is used to power up the furnace for Total Sulfur applications (Refer to Figure 4). Do not supply external power to solenoid drivers on the controller board. Dry Contact Relays Figure 4. Relay & Solenoid Outputs The H 2 S controller board has four dry contact relays used as status outputs, to drive external relays or solenoids. They are rated for a maximum of 120 VAC 5 Amp (Refer to Figure 4). Analog Outputs The H 2 S controller board has two isolated loop power 4-20mA outputs which can be set up for different variable outputs. Loop power (10-32 Volts) sourced from the end device (PLC) is required for the analog to output. Figure 5 shows the different wiring set ups for the analog outputs. The third wiring option shown in Figure 5 uses Envent's powered AO board(s) to provide self-powered analog outputs. These boards are available at Envent Engineering Ltd. Refer to "Power AO Boards" on page 30. Envent Engineering Ltd. Page 16 Revision 2.1

24 The factory default variable for the two analog outputs is the current H 2 S reading on sample 1, labeled in the ICE software as "Sample 1 H 2 S Current Value", meaning both analog outputs are based on the H 2 S readings for sample 1. For SDS models, analog output 2 outputs the variable for sample 2. Figure 5. AO 4-20 ma Output Wiring Options Digital Inputs The H 2 S controller board has four digital inputs use to signal the analyzer of a change of state from an external device, refer to Figure 3. As factory default, DI#1 is used for low H 2 S sensing tape sensor and DI#2 is used for low pressure Envent Engineering Ltd. Page 17 Revision 2.1

25 switch, if applicable. These two devices are installed to the analyzer only by customer request. Serial Ports & I2C The H 2 S controller board has the communication capabilities for RS-232, RS-485 and Ethernet (Optional). The RS-232 Serial port is wired to a mini USB Female connector for easy access with an communication extension cable (provided with analyzer) refer to Figure 6. Figure 6. RS-232 Serial Port wired to a Mini USB Female Connector The TCP/IP communication is achieved via a communication electronics card which is connected to the I2C terminal block on the controller board. It does not come with the analyzer unless otherwise requested by the customer. For more information on the Ethernet communication card refer to "Ethernet Communication Card" on page 30. LCD Display Board The LCD display board used for the H 2 S 330S/331S models is a graphic backlit display with a direct tactile or magnetic interface, refer to Figure 7. The magnetic interface is only used on the 330S H 2 S analyzers which are for Class I, Division 1 areas. The LCD display connects to the controller board with an IDC ribbon cable. Envent Engineering Ltd. Page 18 Revision 2.1

26 Figure S & 331S H 2 S Analyzer Graphic Display Sample Chamber The sample chamber is the component that allows the H 2 S sample to come in contact to the H 2 S sensing tape which in turn is read by the sensor block. The sample chamber is made of the following components: Figure 8. Sample Chamber (Exploded View) Sensor Block The sensor block measures the intensity of the LED light reflected off of the H 2 S sensing tape. It is composed of an electronic board, a red light emitting diode and a photodiode, refer to Figure 8. As the tape gets darker due to exposure to H 2 S, the photodiode receives less light. Less light translates to more H 2 S. Envent Engineering Ltd. Page 19 Revision 2.1

27 Window & Gasket These two components seal the small compartment where the H 2 S comes inside the sample chamber, refer to Figure 8. The window keeps a clear view for the LED and the photodiode to work properly and isolates them from the sample gas. The rubber gasket seals the Sample Chamber compartment preventing any leaks. Aperture Strip The sample chamber has a fixed size aperture of ¼ inch which is used for concentrations in between 1 ppm to 16 ppm. For concentration applications below 1 ppm or above 16 ppm an aperture strip is installed behind the window in the Sample Chamber, refer to Figure 8. These aperture strips keep the analysis time to be approximately the same regardless of the range. Various sizes of apertures match different measurement ranges. Table 2 shows the aperture size according to its range. H 2 S Range Aperture Strip Envent PN 50 ppb to 1 ppm ppb style ppm to 16 ppm None (1/4" fixed aperture size) N/A 16 ppm to 30 ppm 1/16" ppm to 50 ppm 1/32" ppm to 100 ppm Pin Holes ppm to 500 ppm Laser Dot Over 500 ppm Addition of a dilution panel. Consult Factory. Table 2. Aperture Strips & Ranges Aperture strips can be changed to accommodate for a different range application. Refer to the table shown above to select the best option on the new concentration application. Contact Envent Engineering Ltd to purchase an aperture strip. Remember: gain and span values on analog outputs will have to change based on new range application. Please re-calibrate analyzer. Refer to "H 2 S Gas Calibration" on page 54. The adhesive used to glue the aperture strip in its place is RTV108 Translucent Adhesive. RTV102, RTV103, and RTV109 could also be used. Envent Engineering Ltd. Page 20 Revision 2.1

28 Trigger Slide The trigger slide is the device that seals the H 2 S sensing tape against the sample chamber. The pressure created by the two springs is enough to seal the sample chamber (4 5 W.C). The head of the trigger slide is low-friction which ensures the H 2 S sensing tape to move smoothly preventing the tape to break. It also ensures that the stain on the tape has even and sharp edges. Refer to Figure 9. Figure 9. Trigger Slide Installed on a 330S H2S Analyzer (Applicable for 331S Analyzers) Sample flow Components The analyzer should have components that control and prepare the gas sample for proper H 2 S readings. These components are: flowmeter, humidifier, and eductor block. Flowmeter This component comes with all 330S/331S H 2 S analyzer. The flowmeter is a F65-65mm forged aluminum body with a standard cartridge control valve*. Flow must be kept at a constant flow of 2 cm (83.63 cc/min). A change in flow of +/- 1 cm affects the reading by 10% of full range. Envent Engineering Ltd. Page 21 Revision 2.1

29 *The flowmeter is changed to a "No Knob" for 330S/331S H 2 S analyzers with total sulfur or dilution systems. The flow is controlled using a critical orifice set to a flow of cc/min and flowmeters located in the sample conditioning system. Humidifier Unit For the H 2 S to adhere to the surface of the H 2 S Sensing tape, it needs to be humidified. The humidifier unit helps having constant moisture content in the sample which increases the chemical reaction on the H 2 S Sensing tape. Envent Engineering Ltd offers a unique design of humidifiers meant to meet the requirements for humidification of the sample before it gets into contact with the H 2 S sensing tape; refer to Figure 10. Figure 10. Envent's Humidifier Unit for 330S & 331S The humidifier works by using Nafion Tubing. This material has the capability to transports water vapor from the most humidified medium to the driest medium. The sample gas traveling inside the Nafion tube is dryer than the outside of the tube which is being saturated with water, thus, humidifying the gas sample. It is important to have a constant flow to create a constant humidification of the sample gas. The humidifier unit can be filled with distilled water or 5% Acetic Acid up to where the line indicates on the unit. Acetic acid is preferable over distilled water since it prevents the liquid to create mold and fungus overtime. Also the freezing point for water is 0 C and for 5% Acetic Acid is -2 C making it more reliable under freezing temperatures. For the SDS models, the humidifier has two inlet and outlet ports. It is important to make sure that the tubing is not connected to the wrong port. The Vinyl tubing that connect to the humidifier are label with a 1 and a 2, make sure they are matched when installing them to the humidifier. Envent Engineering Ltd. Page 22 Revision 2.1

30 The analyzer should not be exposed to ambient temperatures lower than 0 C. By default, all 330S/331S H 2 S analyzers have a temperature alarm set to 0 C descending. The analyzer should be mounted in an area in which it is not exposed to vibration, excessive pressure, temperature and/or environmental variations. Figure 11 shows know how to install the humidifier unit in a model 331S H 2 S analyzer. Same principle applies for the model 330S H 2 S analyzer. Figure 11. Humidifier Unit Installed in a 331S H 2 S Analyzer Eductor Block The analyzer reading can be affected by positive or negative pressure on the sample vent line. This can be caused by strong winds blowing across or directly into the vent; or by mechanical venting (exhaust fan). The eductor will eliminate any influence on the analyzer reading; refer to Figure 12. Envent Engineering Ltd. Page 23 Revision 2.1

31 Figure 12. Eductor Block (Venturi Effect) The eductor is required with this model in order to maintain electrical safety and certification in division 2 areas. In cold climates, since the analyzer is venting a moist sample, freezing can occur. The educator will help reduce freezing problems in the vent line due to the increased velocity and drying effect of the sweep gas. The eductor vent can be retrofitted to existing analyzers. In normal conditions, the eductor makes a noise similar to a gas leak. This noise is normal and it is due to the 15 psig pressure being expelled through the restricted fitting creating suction from the gas vent line (Venturi Effect). DO NOT block the opening at the bottom of the eductor or the modified elbow fitting. Sample Conditioning System The function of the optional sample conditioning system is to regulate and filter particulates of free liquids from the sample, refer to Figure 13. Consideration must be taken from all potential conditions when designing the sample conditioning system. This section will only cover the 330S/331S standard conditioning system which can be divided into conventional (Refer to Figure 14) or alternative (Refer to Figure 15). Envent Engineering Ltd. Page 24 Revision 2.1

32 Figure 13. PI&D Diagram of Standard Sample System for 330S & 331S H 2 S Analyzers For special sample systems, refer to drawing package in the analyzer binder or USB flash drive provided with the analyzer. The standard sample conditioning system consists of: Envent Engineering Ltd. Page 25 Revision 2.1

33 Filter Housing, Pressure Regulator, & Pressure Gauge (Conventional) Filter Housing The filter housing is capable of withstanding up to 5000 psig. This filter is set as "Particulate" to better remove solid particles from the gas sample. For wet/dirty systems, the filter is set as "Coalescent". The bonded microfiber filter element located inside the filter housing should be changed at least every 3 months or as required depending on the application. Please contact Envent Engineering Ltd to order more bonded microfiber filters. (Part No ) Pressure Regulator The pressure regulator is a Swagelok 316SS psig Inlet and 0-25psig outlet Series KPR. Pressure Gauge The Pressure gauge has a range of 0-30 psig. The pressure should be maintained at 15 psig for normal operation. The lowest pressure found to be acceptable for proper H 2 S measurement is 0.5 psig; however, it is not recommended to have a lower pressure than 10 psig. Three-way valve It allows the user to manually switch from sample gas to calibration gas. Sweep Needle Valve This needle valve works by draining any liquids that may collect from the filter. It also reduces lag time in the sample piping. To learn more about lag time in the sample inlet please go to "Sample Volume & Flow Rate" on page 34. Envent Engineering Ltd. Page 26 Revision 2.1

34 Figure 14. Conventional Standard Sample System Maximum pressure for the standard sample system (conventional) is 2500 psig. Analyzers, depending on its application, are installed in different types of sample conditioning systems which may make its maximum inlet pressure vary. Consult Analyzer's drawing package for more information about maximum inlet pressure. The analyzer unit by itself can only withstand a maximum of 30 psi. Envent IFR Filter Housing, Regulator, & Pressure Gauge (Alternative) Pressure Regulator and Filter Housing The sample conditioning system comes with the Envent's IFR regulator and filter housing unit. The maximum inlet pressure is 3600 psig and outlet is 0-25 psig. Pressure gauge used is the same as the conventional sample system. Refer to Figure 15. The filter housing contains a bonded microfiber filter element that should be changed at least every 3 months or as required depending on the application. Please contact Envent Engineering Ltd to order more bonded microfiber filters. (Part No ) Envent Engineering Ltd. Page 27 Revision 2.1

35 Pressure Gauge The Pressure gauge has a range of 0-30 psig. The pressure should be maintained at 15 psig for normal operation. The lowest pressure found to be acceptable for proper H 2 S measurement is 0.5 psig; however, it is not recommended to have a lower pressure than 10 psig. Three-way valve It allows the user to manually switch from sample gas to calibration gas. Sweep Needle Valve This needle valve works by draining any liquids that may collect from the filter. It also reduces lag time in the sample piping. To learn more about lag time in the sample inlet please go to "Sample Volume & Flow Rate" on page 34. Figure 15. Alternative Standard Sample System Maximum pressure for the standard sample system (conventional) is 2500 psig. Analyzers, depending on its application, are installed in different types of sample conditioning systems which may make its maximum inlet pressure vary. Consult Analyzer's drawing package for more information about maximum inlet pressure. The analyzer unit by itself can only withstand a maximum of 30 psi. Envent Engineering Ltd. Page 28 Revision 2.1

36 Optional Components Envent Engineering Ltd offers optional components that could be required for certain applications. These components are: Low H 2 S sensing Tape Sensor Analyzers can automatically alarm when the H 2 S sensing tape is almost fully used and needs to be changed for a new one. It alarms when the tape has 2 5 days left remaining on the roll. This sensor is installed at customer request or it can be obtained after purchase. Refer to Figure 16. Figure 16. Low H 2 S Sensing Tape Sensor Please contact Envent Engineering Ltd to order a low H 2 S sensing tape sensor. (Part No A) The low H 2 S sensing tape sensor is wired to DI#1 in the controller board by default. Low tape alarm is configured to change state of Relay#4, Fault LED, and Virtual#1 for standard configurations. Low Pressure Switch Analyzer with low pressure switch(es) alarm when the sample inlet pressure drops below 10 psig. Pressure switch(es) are installed at customer request. It is wired to DI#2 by default in a Fail Safe configuration. Low pressure alarm is configured to change state of Relay#4, and Fault LED for standard configurations. Figure 17. Internal & External Pressure Switches Envent Engineering Ltd. Page 29 Revision 2.1

37 There are two types of pressure switches available. Internal pressure switch and external pressure switch; refer to Figure 17. Both styles can be used for both the 330S and 331S H 2 S analyzers. If the internal switch is used on the 330S H 2 S analyzer (division 1), a flame arrestor is used to comply with regulation standards. Power AO Boards The 330S/331S H 2 S analyzer has two isolated loop power 4-20mA Outputs. For self-powered AO, power AO boards can be implemented at customer request; refer to Figure 18. Ethernet Communication Card Figure 18. Analog Output Board The 330S/331S H 2 S analyzer has the capability to communicate through RS-232 and RS-485. For Ethernet (TCP/IP Protocol), a communication card is implemented to the analyzer at customer request, refer to Figure 19. Figure 19. Ethernet Communication Card Envent Engineering Ltd. Page 30 Revision 2.1

38 INSTALLATION Installation Requirements Electrical Requirements The 330S/331S H 2 S analyzer's controller board can either be VAC or 10-32VDC. Consult the analyzer nameplate attached to it or factory calibration certificate for more information. Controller board ground connection to chassis is represented by the letters FG and ground symbol. Certification nameplate shows the voltage range at which the controller board can withstand (e.g., VAC), however, when using external devices which are powered by the controller board (e.g., solenoids), that voltage range no longer applies and only the external device s voltage rating shall be used; e.g., 120 VAC rated solenoid, the analyzer shall be powered with only 120 VAC and not 240 VAC. The power consumption for a VDC analyzer is 3 Watts and for a VAC is 5 Watts. For the total sulfur option the power consumption 300 Watts. Location for the System First to be considered is the electrical area classification the analyzer will be installed in. Make sure the analyzer meets the requirements for the installation site. The 330S H 2 S analyzer is suitable for Class I, Division 1 Groups CD (or Groups BCD by customer request). The 331S H 2 S analyzer is suitable for Class I, Division 2 Groups ABCD. When the total sulfur option is used, the 330S is rated for Class I, Division 1 Groups BCD and the 331S is for Class I, Division 2 Groups BCD. The 330S/331S H 2 S analyzer should be mounted in an area in which it is not exposed to vibration, excessive pressure, temperature and/or environmental variations. The ambient temperature range for the 330S/331S H 2 S analyzers is 0 to 50 Degree Celsius. If the analyzer is installed in an area where temperatures go out of this range or it varies abruptly, Envent Engineering Ltd has options such as cabinets or shelters; consult Envent Engineering Ltd. Envent Engineering Ltd. Page 31 Revision 2.1

39 Space Requirements Figure 20. Space Requirements for the 330S & 331S H 2 S Analyzers Make sure to leave at least 1 feet of extra space on the left side of the 330S H 2 S analyzer. This will allow proper opening of the side door located at the upper blue chassis where the H 2 S sensing tape is located. Envent Engineering Ltd. Page 32 Revision 2.1

40 Sample Point Selection The sample to the 330S/331S H 2 S analyzer must be representative of the process stream and should be taken from a point as close as possible to the analyzer to avoid lag times and sample degradation in the tubing. A probe must be installed vertically on a horizontal section of pipe ensuring that the sample is drawn from the middle third of the pipeline. An optional Genie GPR Probe regulator may be used. The function of this probe is to ensure a clean dry sample to the analyzer and to reduce the pressure of the sample. The lower pressure will improve the response time of the analyzer. Refer to Figure 21. It is advisable that the probe not be installed on a vertical pipe. Sample inlet & sample sweep 1/4 inch 316 stainless steel tubing and fittings are recommended for the sample inlet and sample sweep tubing. Sample sweep can be connected to a flare line if available. Refer to Figure 21. 1/8 inch 316 stainless steel tubing can also be used if the response time of the analyzer is of particular concern. Vent line 3/8 inch stainless steel tubing and fittings are recommended for the vent line to a maximum of 6 feet in length. 1/2 inch stainless steel tubing should be used for vent lines exceeding 6 feet. The tubing should be installed with a slight downward slope and should be as short as possible. Refer to Figure 21. The sample vent line must be tubed to atmospheric pressure outside and cannot be connected to a flare line or header. Envent Engineering Ltd. Page 33 Revision 2.1

41 Figure S Recommended Venting for 331S (Same as the 330S H 2 S Analyzer) Sample Volume & Flow Rate The sample should be supplied to the 330S/331S H 2 S analyzer at psig and at a flow of cc/min (set flowmeter at 2.0). A bypass sweep is recommended to reduce sample lag time in the sample line if it is at high pressure or it is longer than 15 feet (The Standard H 2 S conditioning sample system has a bypass sweep). The standard sample tubing material is 1/4" 316 stainless steel; however, 1/8" stainless steel tubing can be used if the response time is critical (refer to Table 3). Tube Size (") Tube Gauge ID (") ID (cm) Flow (SCFH) Flow Std. (cc/min) Pressure (PSIA) Lag Lag Time per Time per 100' (min) 100' (sec) 3/ / / / / / / / / Table 3. Sample Volume and & Flow Rate Carbon steel sample line and/or fittings are not acceptable. Envent Engineering Ltd. Page 34 Revision 2.1

42 Receiving the Analyzer Inspect the packaging for external damage right after is received. If there is any physical damage, please contact Envent Engineering Ltd and request that the carrier's agent be present when the analyzer is unpacked. If a disagreement arises the incoterms agreed by the seller and the customer will overrule any dispute. Unpacking the Analyzer If damage is found in the shipping container see previous section "Receiving the Analyzer". 1. Open the shipping container and remove the foam packing or other packing materials from the shipping box. 2. Take out the analyzer and the start-up kit. The 330S H 2 S analyzer with a standard Sample conditioning system weights approximately 105 lb. Unpacking and transporting requires a minimum of two persons. 3. Make sure the start-up kit is complete (refer to list below). For some special and more complex analyzers, there might be extra parts in the start-up kit. Standard spare parts for 330S H 2 S analyzers: S Customer Binder Customer Manual(s) and Addendums Factory Calibration Certificate Factory Configuration Drawing Package Cal Gas Certificate(s) 2. USB flash drive (containing all documentation) ' H 2 S Sensing Tape. Part No XS 4. 1 Liter Analyzer Fluid. Part No Funnel S Serial Comm. External Cable (USB to Mini USB). Part No Humidifier (uninstalled). Part No (Part No D for SDS) 8. Bolts For explosion proof enclosure (x22) Envent Engineering Ltd. Page 35 Revision 2.1

43 Standard spare parts for 331S H 2 S analyzers: S Customer Binder Customer Manual(s) Factory Calibration Certificate Factory Configuration Drawing Package Cal Gas Certificate(s) 2. USB flash drive (containing all documentation) ' H 2 S Sensing Tape. Part No XS 4. 1 Liter Analyzer Fluid. Part No Funnel S Serial Comm. External Cable (USB to Mini USB). Part No Humidifier (uninstalled). Part No (Part No D for SDS) Installation procedure & Start-up The following steps should be followed for proper installation and start-up of the analyzer. 1. Unpack the analyzer and check for damage. Refer to "Receiving the Analyzer" on page 35 for more information. 2. Ensure the analyzer power supply and range are suitable for the installation location. Refer to "Electrical Requirements" on page 31 for more information. 3. Check that the hazardous location rating is suitable for the installation location. Refer to "Location for the System" on page 31 for more information. 4. Ensure that the selected installation site provides adequate room for maintenance and repair. Refer to "Space Requirements" on page 32 for more information. 5. Select an installation location close to the sample point. Refer to "Sample Point Selection", "Sample inlet & sample sweep", and "Vent line" sections on page Bolt the analyzer to the wall with the H 2 S sensing tape drive at approximately eye level. 7. Wire the power, analog outputs and discrete outputs from the analyzer. Envent Engineering Ltd. Page 36 Revision 2.1

44 8. Tube the Sample inlet, sample sweep, and sample vent lines from the analyzer. 9. Ensure there is enough H 2 S Sensing tape. To install H 2 S sensing tape refer to "H 2 S Sensing Tape Change Procedure" on page Install the Humidifier, if applicable. Ensure there is enough 5% acetic acid or distilled water in the humidifier. Refer to "Humidifier Unit" on page 22 for more information 11. Apply power to the analyzer. The display will illuminate and the H 2 S sensing tape will advance for a few seconds. 12. Press the menu button until mv is displayed. Check that the mv reading is 1000 mv (± 100 mv). There are two mv values shown in the display, the "mv Zero" and the "mv" Values. Check for the "mv" Values. For the SDS models, check for "Sensor 1 mv" and "Sensor 2 mv". 13. Make sure the sample inlet valve, sample sweep valve, and pressure regulator are completely closed. The pressure regulator is completely closed when the knob handle is counter clock wise. 14. Turn on the sample gas flow to the conditioning sample system and then open the sample inlet valve. 15. Open the sweep valve slightly and adjust pressure regulator to 15 psig and the flow meter to Allow twenty minutes for the analyzer to stabilize. The analyzer calibration can be verified if calibration gas is available, refer to "H 2 S Gas Calibration" on page 54. If no calibration gas is available, the analyzer may be operated using the factory calibration settings until calibration gas is available. Envent Engineering Ltd. Page 37 Revision 2.1

45 OPERATION & CONFIGURATION The 330S/331S H 2 S analyzer can be configured by using the display-button function or by connecting the analyzer to a computer through USB. Analyzer Display Interface By using the analyzer's display, the user can only view and/or change certain parameters set at the factory. For advance changes refer to "Analyzer ICE Software Interface" on page 39. The display is made up of a Graphic Display, four (4) push-buttons and (8) LED's. Refer to Figure 22. Figure S Display (left) & 331S Display (right) The Descriptions and Function of the display buttons and LED's are described in table Table 4 & Table 5. Button Bypass Scroll Right [ ] Scroll Left [ ] Menu/Set Description/Function Used to inhibit all analyzer alarms to a non-alarm state and sets the analog 4-40 ma output to 2 ma. The Bypass LED illuminates when Bypass mode is enabled. Used to move the cursor to the right. Also used to SAVE configuration adjustments when moved all the way to the right of the screen. Used to move the cursor to the left. Also used to CANCEL configuration adjustments when moved all the way to the left of the screen. Used to cycle through the menu options. Also used to increase numerical values when making configuration adjustments. Table 4. Display Button Description/Function Envent Engineering Ltd. Page 38 Revision 2.1

46 LED Bypass LED A & B Fault LED 1 to 4 Description/Function Illuminates when the analyzer is in bypass mode. Red LEDs that can be used for different alarm configurations. By default, these LEDs are left as spare. Illuminates when there is a fault in the Analyzer. Fault is used for Board temperature, Sensor High/Low, Low H 2 S sensing tape sensor, Pressure switch, etc. Green LEDs that can be used for different alarms or conditions. By default, H alarm activates LED-1 and HH alarm activates LED-2. (Refer to the LED Sticker on the analyzer door on the inside (331S) or to the right side of the blue chassis on of the XP enclosure). Table 5. Display LED Description/Function Analyzer ICE Software Interface Introduction to the 330S/331S ICE Software The 330S/331S H 2 S analyzer has a software application for more advanced changes on the analyzer's configuration. To install the ICE Software, refer to the installer which comes in a USB flash drive with the analyzer (Check Start-up kit box). It is also available at The analyzer is configured at the factory according to the information provided by the customer at the time of purchase. If no information is provided by the customer, Envent Engineering Ltd will assign a standard configuration. This manual covers only information that will help the user update/change the analyzer's configuration file. The features in the ICE Software that are not covered on this manual are not to be changed from its factory configuration. If advanced changes are necessary involving features not cover on this manual, contact Envent Engineering Ltd for assistance. Envent Engineering Ltd. Page 39 Revision 2.1

47 Safety Guidelines Read this manual section before operating the ICE software to change the default configuration to ensure correct operation of the analyzer. Envent Engineering Ltd configures analyzer in conformance to the customer specifications (if applicable). Any modifications on the factory configuration by the user may impair the proper functionality of the analyzer if not performed properly. Contact Envent Engineering Ltd for more information on how to modify the configuration of the analyzer. For Class I, Division 1 Model 330S Analyzers, the glass window must remain installed in order to maintain area classification. However, to communicate to the 330S analyzer via RS-232 or RS-485 the glass window must be removed. Ensure area is known to be a non-hazardous before removing the explosion proof window. Using the ICE Software This section covers an overview on the 330S/331S ICE Software application. It shows how to connect, configure and change the factory configuration to accommodate for different applications. The H 2 S analyzer's controller board has a USB port for local user interface and three RS-485 connections. The RS-485 connections are identified with numbers from 1 to 3 on the controller board. Connections RS-232, RS and RS are used to communicate with the analyzer to check or modify the current analyzer's configuration; these connections have Modbus communication capabilities. RS is only used for remote display option. The proper Mini USB to USB cable is provided in the analyzer spare parts. Connecting the Analyzer to a Computer Using the ICE Software Install the ICE software on your computer using the software installer provided in the USB flash drive or on the Envent Engineering's website. Once the ICE software is installed, physically connect the analyzer to the computer using the Mini USB to USB cable provided. Open the ICE software. Select the USB port the analyzer is physically connected to. Do not select ''Enable Hi-Speed''. Click on ''Read'' and wait until the green bar has completed at the bottom of the screen, refer to Figure 23. Once communication has been established successfully, the user will be able to modify the analyzer's configuration and write it to the analyzer. Envent Engineering Ltd. Page 40 Revision 2.1

48 Figure 23. ICE Software: Enable Communication If there are communication problems, check for the following: 1. Check that the analyzer is ON. 2. Check that the communication cable is properly connected. 3. If the ICE software application was open before physically connecting the analyzer to the computer, close the ICE software and re-open it. Try again and enable communication. Modify analyzer's Configuration Before modifying the factory configuration file, make sure to save it on your computer first for future retrieval. If the factory configuration file is lost or modified without saving it, a copy is kept in the USB flash drive given with the analyzer. Envent Engineering Ltd can also provide a copy. To save the configuration file, go to File > Save or Save as. Make the appropriate changes on the factory configuration file through the ICE software. When changes are made, they need to be uploaded to the analyzer in order to overwrite what is currently on it. Click on the ''Write button'' (located beside the Read button; refer to Figure 23) and wait until the new configuration is uploaded successfully. Discrete Input Configuration In this section of the ICE software, discrete inputs (and virtual inputs) are configured. Go to System IO>Inputs>Discrete Inputs. Refer to Figure 24. Envent Engineering Ltd. Page 41 Revision 2.1

49 Analog Inputs are not covered in this manual since they must not be changed from their factory values. IO Name Figure 24. ICE Software: Configuration: System IO Tab: Inputs Tab IO names are names assigned to the discrete and virtual inputs. The name is up to the user's discretion. Figure 24 shows DI#1 to be for Low H 2 S Tape Sensor. Once a discrete or virtual input is configured, an alarm can be added based on the discrete or virtual input status. Refer to "Alarm Configuration" on page 45. Active State Action Active state action is the response or output the discrete or virtual input will have when changing states. "Standard" is selected when the discrete or virtual input is used to output an alarm condition. "Bypass and halt" will place the analyzer into these states when the discrete or virtual input changes state. "Acknowledge" is used when an latched alarm needs to be acknowledged remotely (by means of a switch). Analog & Discrete Output Configuration In this section of the ICE software, analog and discrete outputs are configured. To access the analog and discrete outputs, go to System IO>Output Tab. Refer to Figure 25. Envent Engineering Ltd. Page 42 Revision 2.1

50 Figure 25. ICE Software: Configuration: System IO Tab: Outputs Tab Analog Outputs Analog outputs are used when a device must be monitored or controlled remotely over a pair of conductors. Two 4-20 ma loop-powered analog output connections are available on the controller board (or looped-powered if AO Boards were requested by the customer); refer to "Analog Outputs" on page 16 for more information. This section will refer to the configuration of the analog outputs through the ICE software. Changing the analog outputs' ranges (span values) should be done in consultation with Envent Engineering Ltd. If the intention is to change the analyzer's H 2 S range, previous steps must be followed in order for this change to work properly. The aperture strip must be changed, alarm setpoint values, gain, H 2 S range, etc. Do not change the "Factory Zero" and "Factory Span" values. The Third analog output is only used for Total Sulfur options. Do not modify factory settings. Track Mode This option allows activating or deactivating the analog output. Refer to Figure 25 area 1 Envent Engineering Ltd. Page 43 Revision 2.1

51 IO Name IO Names are names assigned to the analog outputs. The name is up to the user's discretion. Figure 25 area 1 shows the analog output names as "H 2 S" as default for standard configurations. Zero & Span These columns refer to the range being measured. Since the variables used for the analog outputs are the analyzer H 2 S readings, the zero and span values are 0 to 20 ppm of H 2 S (for standard configurations). Refer to Refer to Figure 25 area 1 For the standard factory configuration on 330S/331S, both 1 and 2 analog output variables are based on the analyzer H 2 S readings of sample 1. For the standard factory configuration on the 330SDS/331SDS models, analog output 1 variable is based on H 2 S reading of sample 1 and analog output 2 variable is based on H 2 S reading of sample 2. Factory Zero & Factory Span These values are set at factory. They compensate for the differences on the resistors and capacitors in the controller board. Do not modify these values. Variable Items used by the analog output to signal their current statuses. To select a new variable, go to the right hand menu on dark blue background and find the new variable. Click and drag the variable to the variable column and proceed to change the specification on the analog output row according to the new variable. Discrete Outputs In this section of the ICE software, discrete outputs are named and their status states are set-up. Refer to Refer to Figure 25 area 2. IO Name IO Names are names assigned to the discrete outputs. The name is up to the user's discretion. Names are set-up according to the analyzer standard factory configuration file. These names are based on what alarm variable they are used for. These discrete output names will appear in the Output Controls column in the Alarm tab section. Refer to Figure 25 area 2. Envent Engineering Ltd. Page 44 Revision 2.1

52 Active State Active state is the condition the discrete output will have when in alarm. If selected as "De-energized", the discrete output will be fail-safe. Refer to Figure 25 area 2. Alarm Configuration In this section of the ICE software, alarms and alarm setpoint are configured. Refer to this section to learn how to add, modify, or delete an alarm. Adding an Alarm Go into the ''Alarm'' tag, refer to Figure 26. This section will show the current alarm configuration on the analyzer. Figure 26. ICE Software: Configuration: Alarms Tab To add an alarm, use the right hand menu on dark blue background to locate the appropriate variable as shown in Figure 26. On the right hand menu is where all analyzer variables can be found. In this example, we will add an Emergency System-Shutdown (ESD) using 15 ppm of H 2 S concentration readings as the setpoint. To add the appropriate variable for this example, click on Modes>Sample> H 2 S >Current Value. Refer to Figure 27. Envent Engineering Ltd. Page 45 Revision 2.1

53 Figure 27. ICE Software: Adding Variable as an Alarm Click on the appropriate variable, in this case ''Current Value'', and drag it all the way to the empty variable box, refer to Figure 27. Once the variable has been added to the list, you can proceed and change the alarm parameters on the variable. These parameters are: Description It will label the variable. This will identify the alarm on the display. Sense Mode Alarm will activate when variable values are ascending or descending. Setpoint The setpoint is the value at which the alarm will activate. Reset Value at which the alarm resets back to a no alarm condition. The reset value is calculated automatically from the setpoint minus the dead-band value assigned. Dead-band Area of a measured variable that must be compensated before the alarm condition goes to a non-alarm condition. The dead-band is use to avoid ON-OFF repeatedly if the variable value is close to the alarm setpoint. Envent Engineering Ltd. Page 46 Revision 2.1

54 Latch Latching an alarm will keep its alarm condition even after the variable values are no longer in alarm condition. When an alarm is latched, it will need to be acknowledged through the display (ACK) or by remote acknowledge (through a Digital Input) for the control outputs to go back into normal state. Output Controls Output control or discrete outputs, when selected, will change states when the alarm is triggered. To select the active state of the discrete outputs, go to System IO>Outputs Tab>Discrete Outputs. Alarm Timer It is a timer delay for the alarm to activate once it has hit the setpoint and kept that alarm condition during the timer countdown. The analyzer recognizes the alarm condition but it will not go into an alarm state or activate any discrete outputs until the timer countdown has completed. (E.g. the temperature is set to 120 seconds and the setpoint is 0 Degrees Celsius - descending). The analyzer will go into alarm after the analyzer reaches 0 Degrees Celsius or lower and stays at or below the setpoint during the full countdown. AO1 & AO2 Full Scale It forces the analog outputs to full scale when a condition is met. For instance, if the RRA alarm setpoint is set to 20 ppm with a Full scale AO1 option checked (Checkbox), AO1 will immediately go to 20 ma or Full scale when the analyzer reads 20 ppm or more. This would happen before the actual analysis time is done (2-3 mins) which makes it ideal for immediate shutdown. Figure 28. ICE Software: New Alarm Set-up Envent Engineering Ltd. Page 47 Revision 2.1

55 Figure 28, shows a new alarm non-latching, ascending, setpoint of 15 ppm, deadband of 0.1, description as ESD, no output controls and no alarm timer. To move the alarm up or down on the list, click on the ''View'' column for that specific alarm. In our example, click on the ''8 of 32'' box which highlights the entire alarm row. Then press control + up or down arrow keys. Removing an Alarm Click on the ''View'' column for that specific alarm. Once the alarm row is highlighted, press ''Delete'' on the keyboard. Archive Setup Configuration In this section of the ICE software, archiving is configured. To set up the archiving to record information on certain variables, go to the Configuration > Archive Setup Tab in the left side menu. Figure 29. ICE Software: Configuration: Archive Setup Tab The green-black box shown in Figure 29 is a representation of the memory capacity of the controller board for archiving information. The green area represents the memory that will be consumed or used by the items already selected and the amount (in this case 100,000 records). The black area represents the memory availability. Figure 29 shows that the two items or variable selected (in Envent Engineering Ltd. Page 48 Revision 2.1

56 this case Current Value and Sensor Zero) with 100,000 records (per item) would use 54.6% of the total memory capacity. Item & Archive Name There are up to 6 groups with a maximum of 6 items (variables) that can be added to each group. Group 1 name assigned for Figure 29 is "Sample". Rollover Count It is the number of records per item that the analyzer will archive. Activation: End of Analysis The analyzer obtains a new H 2 S reading after the analysis cycle is completed (360 sec max). That is when the analyzer will record the values of each item selected. The average analysis time is 140 sec to 220 sec; depends on the application and the H 2 S range. Activation: Continuous (Always Set) When data needs to be recorded at a certain time interval regardless of the analysis cycle, this option is used. The time interval options vary from every 1 sec to every 30 min. The End of Analysis and the Continuous (Always Set) options can also be selected at the same time. Selecting More Items (Variables) Inside a Group To select items inside a group, locate the variables in the right hand menu on dark blue background and drag them into the ''Item'' column; same procedure as "Adding an Alarm" on page 45. Creating another Group To create a new group, simply select an item in the right hand menu on dark blue background and drag it into an empty row in the ''Item'' column. Assign a name, the maximum amount of records and the activation method. Retrieve Archives from the Analyzer Go to the ''Archive'' tab under the report section in the left hand menu. Refer to Figure 30. Envent Engineering Ltd. Page 49 Revision 2.1

57 Read Archive Records Figure 30. ICE Software: Reports: Archives Tab Retrieve the records from the analyzer by clicking on this button. The amount of records retrieved will depend on the offset and # of records. Refer to Figure 30 area 1 # of Records The number of records retrieved from the analyzer. By default the analyzer always retrieves from newest to oldest records. Figure 30 area 1. Offset The records are always retrieved from newest to oldest. Use the offset to see the oldest records and skip the newest ones. E.g. the analyzer has recorded 1000 records, and only the first 100 records (Oldest) need to be retrieved, type in 900 in the offset box and this will skip the latest 900 records. Refer to Figure 30 area 1. Sample On Figure 30 area 2 shows "Sample" and ''Alarm Result'' buttons. "Sample" was the name giving to group 1 on the Configuration>Archives Tab; refer to Archive Setup Configuration on page 48 for more information. Alarm Result The ''Alarm Result'' group is a fixed section that shows all the alarms state changes, bypass action, discrete input state change, etc. Refer to Figure 30 area 2. The analyzer stores up to 1024 records from this fixed archive group. Recognize Envent Engineering Ltd. Page 50 Revision 2.1

58 that these records are only saved when there is a state change. It is not based on a time frame or analysis time. Date Range The Date Range is the option of retrieving data from specific calendar days. By default, the analyzer will always retrieve data from the current date. To always retrieve records from a specific Date Range, check the Fixed box to retrieve records from a specific time. Refer to Figure 30 area 3. Select/De-select All, Copy to Clipboard, & Auto Fit Once archives have been retrieved from the analyzer, click on Select all and then click on Copy to clipboard. This data can then be used in a spreadsheet document. The auto fit option is used to increase the column's width for when the variable's name being recorded is too long. Refer to Figure 30 area 3. Display Configuration To configure or change the factory configuration on the display, go to the ''Display'' tab on the left hand menu. Figure 31 area 1 shows the current variables that appear in the analyzer display. Area 2 shows different options for the LED's, display options, and button options. Area 3 is used for adding special characters into the caption and units areas. Figure 31. ICE Software: Configuration: Display Tab Envent Engineering Ltd. Page 51 Revision 2.1

59 Caption Names assigned to the selected variables to be shown in the display. The name is up to the user's discretion Variable Item that will be shown in the analyzer's display. To select a new variable, go to the right hand menu on dark blue background and find the new variable. Click and drag variable to the variable box and proceed to change the specification on the analog output row according to the new variable. Units Unis are a simple multiple of the unit of measurement that describes the variable selected. Refer to Figure 31 area 1. Decimals This is where the amount of decimals per variable are decided. Refer to Figure 31 area 1. For lower range H 2 S analyzers (e.g ppm) it is recommended to use 1 to 2 decimal points, but for high range (e.g. 0-10,000 ppm) it is recommended to not use decimal points as they are not significant enough for these ranges. LED Blink Hz This option is used to make the LED blink when activated. The lower the value, the fastest it will blink. Zero value means no blinking. Refer to Figure 31 area 2. Backlit Timeout (Seconds) Amount of seconds the display backlit will stay ON after pressing a display button. Zero means the backlit stays always ON. Refer to Figure 31 area 2. Menu Timeout (Seconds) The amount of seconds the display will wait until it automatically returns to the main menu. Zero means the display will not return to the main menu automatically. The user will need to complete the menu cycle (by pressing the menu button lower button) until it goes back to the main menu. Refer to Figure 31 area 2. Envent Engineering Ltd. Page 52 Revision 2.1

60 Layout Type This applies to the main menu in the analyzer display. The user can select from 1 to 4 items. These items refer to the variables selected in Figure 31 area 1. If "2 lines" is selected, the 1 st and 2 nd variables will appear in the main menu. The display text size will change accordingly to the number of lines displayed in the main menu. Top Button Function This feature allows the user to change the function of the top button in the analyzer display. By default, this button is set to be the bypass manual option. The other options are: Halt, Acknowledge, and Disable. Keep in mind that the acknowledge option is already included in the display variables. Remote Display This option allows having a remote display which it would be connected to the RS on the controller board. Envent Engineering Ltd. Page 53 Revision 2.1

61 CALIBRATION PROCEDURES H 2 S Gas Calibration Depending on the application, the 330S/331S H 2 S analyzer will require more or fewer periodic calibrations. There is no specific time as to how often the H 2 S analyzer should be calibrated. It will depend on the application, importance of accuracy for the application, and how dirty or clean the environment and sample are. The following is the calibration procedure for the 330S/331S H 2 S analyzer: 1. Source a calibration gas of H 2 S in balance of N2 regulated to 15 psi (check expiry date). H 2 S concentration to be approximately 2/3 of full scale range or close to the H 2 S alarm set point. 2. Press the bypass button and verify the "Bypass" LED illuminates (alarms will be held in the non- alarm state). 3. Turn off all gas supplies to the analyzer and check that a sufficient amount of H 2 S sensing tape is installed. 4. Press the "Menu/Set" button until "Mtr Run" is displayed. Press the right arrow [ ], the H 2 S sensing tape will advance for approximately 10 seconds. 5. Press the "Menu/Set" button until "mv" is displayed ("###mv"). If the mv reading is 1000mV (+100mV), proceed to the next step, otherwise re-zero sensor (Refer to "Re-zero Sensor Procedure" on page 55). 6. Connect calibration gas to calibration port and turn the 3-way calibration valve 180. The valve handle should be pointing towards where the gas bottle tubing is connected to (Calibration Inlet). 7. Turn on sample inlet valve, ensure that the sample regulator is supplying 15psig to the eductor (make sure there is suction from the eductor block). Adjust the flow meter to 2.0. Wait until the H 2 S reading has stabilized (10 to 15 minutes). 8. With calibration gas applied, if H 2 S reading is satisfactory (+2% of analyzer full range) skip to step 16, if H 2 S reading is not satisfactory a gain adjustment is required, continue to step Press the "Menu/Set" button until the gain setting is displayed ("### Gain"). 10. Calculate the new gain. New gain value should be within approximately 25% of the gain installed at the factory. Envent Engineering Ltd. Page 54 Revision 2.1

62 11. To adjust the gain setting such that the analyzer displays the correct H 2 S concentration, press the right [ ] and / or left [ ] arrows until the cursor is underneath the number you wish to change. 12. Adjust the number using the "Menu/Set" button (it will increase until "9" then will cycle back through "0"). 13. Save the new gain value by pressing the right arrow [ ] until "Saved" appears or discard by pressing the left [ ] arrow until "Cancel" appears. 14. Allow the analyzer to complete two cycles using the new gain value. The H 2 S reading should match the calibration gas concentration. Repeat step 10 if necessary. 15. Return to sample gas flow using the 3-way calibration valve. 16. Set the sample gas pressure to 15 psig and set the flow meter to Disconnect the calibration gas supply. 18. After waiting 10 to 15 minutes confirm the analyzer reads below the H 2 S alarm set points. Remove the analyzer from bypass mode by pressing the bypass button. Verify the "Bypass" LED turns off. Alarms are armed after removing the bypass mode. Re-zero Sensor Procedure 1. Press the bypass button and verify that the "Bypass" LED illuminates. 2. Turn off sample gas flow using sample inlet valve. 3. Press the "Menu/Set" button until "Mtr Run" is displayed. Press the right arrow [ ], the H 2 S sensing tape will advance for approximately 10 seconds. 4. Remove the sensor cover. 5. Press the small pushbutton on the sensor block located on the lower left side next to the wire connector. The sensor block will implement a "re-zero" procedure, indicated by a lit, red LED. Envent Engineering Ltd. Page 55 Revision 2.1

63 When the "re-zero" procedure is complete the LED light will turn green. 6. Initiate another motor run (Step 3). 7. Press the "Menu/Set" button until "### mv" is displayed. Value should be 1000mV (+100mV) 8. Put on sensor cover. 9. Turn on sample gas flow using sample inlet valve. 10. Set the gas pressure to 15 psig and the flow meter to Confirm the analyzer reads below the H 2 S alarm set points. 12. Remove the analyzer from bypass mode by pressing the bypass button. Verify the "Bypass" LED turns off. Alarms are armed after removing the bypass mode. Envent Engineering Ltd. Page 56 Revision 2.1

64 MAINTENANCE The 330S/331S H 2 S analyzer will provide reliable service with very little attention. If the analyzer is kept clean there should be no requirement to recalibrate from factory gain settings. However, regular check-up (at least every three months) will ensure that the analyzer is operating to specifications. Ensure that the H 2 S sensing tape take-up and feed reels are tight Ensure that the flow meters, humidifier tubing and sample chamber tubing are free of liquid or particulate contamination. If the sample conditioning system is flooded with liquid, refer to "Sample Conditioning System Cleaning Procedure" on page 58. Ensure there is enough H 2 S sensing tape, especially if a low H 2 S sensing tape sensor is not installed. Refer to "H 2 S Sensing Tape Change Procedure" on page 57. Check the sample conditioning filter(s) every time the H 2 S sensing tape is replaced. Replace the filter(s) as required. H 2 S Sensing Tape Change Procedure Figure S & 331SDS H 2 S Sensing Tape Change Procedure (Applicable for 330S & 330SDS Analyzers) Envent Engineering Ltd. Page 57 Revision 2.1

65 Sample Conditioning System Cleaning Procedure During start-up or plant upset situations, the 330S/331S H 2 S analyzer may become contaminated with amine or hydrogen sulfide scavenger solution. This may cause the analyzer to read low (this can be determined at calibration). If the analyzer reads low, it will require incremental increases in the gain to maintain calibration. Please refer to factory calibration sheet for factory set gain factor. The scavenger solution is water soluble and therefore is relatively easy to clean. Material List Cleaning Kit Part Number: Alconox RBS Solid, powdered precision cleaner w/ MSDS (2.5 tbsp) Rear window and gasket MIF-225-PP Small nipple (x2) MIF-32-PVC Grey nipple MIF-32-PP Big nipple MIF-24-PVC Humidifier replacement tube fittings (x2) MIP-4 Humidifier replacement plug Black 1/8" male/female elbow LT-2-4 (1/4" x 11") Tubing for sample chamber to humidifier LT-2-4 (1/4" x 10") Tubing for flow meter to humidifier LT-3-5 (3/16" x 10") Tubing for sample chamber to vent block PFA (24") Tubing for flowmeter to bulkhead Do not use solvents, brake cleaners, soaps, detergents or rubbing alcohol to clean up analyzer or sample system. Procedure 1. Mix a 1% (2-1/2 tbsp per gallon) of Alconox in warm water 2. Sample line tubing Shut off flow at the sample point prior to sample conditioning system Flush the sample line and components with cleaning solution Rinse with fresh water Flush with isopropyl alcohol Dry with clean, dry instrument air or gas 3. Sample conditioning system Take pictures of SCS before disassembling Remove filter elements from filter housings and discard Remove all sample conditioning system components and soak in cleaning solution Envent Engineering Ltd. Page 58 Revision 2.1

66 Ensure valves are fully open when cleaning Flush sample components with fresh water Rinse with isopropyl alcohol Blow dry with clean compressed air or fuel gas If the clear Vinyl tubing appears discolored, replace the tubing. Nafion tubing on humidifier should be replaced if it appears contaminated Disassembly of the pressure regulator and solenoids in the field is not advised. Consult the factory if the regulator or solenoid appears contaminated. 4. Re-assemble Stainless Steel Tubing to analyzer according to analyzer drawing, refer to pictures taken before disassembling or refer to drawing package. 5. Once sample conditioning system has been re-assembled, apply calibration gas to the analyzer. Refer to "H 2 S Gas Calibration" on page 54. Envent Engineering Ltd. Page 59 Revision 2.1

67 TROUBLESHOOTING H 2 S Readings Issues Problems Possible Reasons Possible Solutions Erratic H 2 S Trigger slide and H 2 S sensing Ensure trigger slide and H 2 S sensing tape Readings tape not seated properly are seated in the groove of the sample Pressure in building moving up and down from fan, exhaust or wind Sample vent/eductor either blocked or frozen Analog input 2 jumper removed Sensor block fault Sensor did not zero on white H 2 S sensing tape Regulator not maintaining 15 psig (Changing flow rate to analyzer) Continued on next page chamber. The eductor should counteract this effect, however, the eductor may be plugged or vent blocked. Check there is no blockage and that all vent tubing and fitting are 316 stainless steel, sized 3/8'' or larger on a downward slope. Check there is no blockage on the vent and/or eductor. Check for vacuum in Eductor block. Vent tubing and fittings should be 316 stainless steel 3/8'' or larger on a downward slope. Possible heat trace required. Re-install jumper in Analog Input across (+4-20 & -4-20) on the controller board. Re-zero sensor block. Refer to "Re-zero Sensor Procedure" on page 55. Check for green status led on sensor block once procedure is done & proper mv on white H 2 S sensing tape. Check the H 2 S Sensing tape, if not properly installed, refer to "H 2 S Sensing Tape Change Procedure" on page 57 or on sticker in the analyzer's door. Perform a motor Run: Display>Press Menu Button until "MTR Run">Press right button. This will activate the motor and move the H 2 S Sensing tape for a few seconds. Re-zero sensor block if necessary. Refer to "Re-zero Sensor Procedure" on page 55. Replace Regulator, Consult Envent Engineering Ltd. Envent Engineering Ltd. Page 60 Revision 2.1

68 H 2 S Readings Issues (Cont d) Problems Possible Reasons Possible Solutions Contaminants in sample Clean sample chamber, aperture and chamber window; replace if required. Contact Envent Slow response Higher than Expected Readings Contaminants or liquid carry over in sample conditioning system Humidifier leaking Possible high pressure in flare line (Dilution option only) Aperture in chamber not optimized for required range Contaminants or liquid carry over in sample conditioning system Sample vent/eductor either blocked or frozen Contaminants in sample chamber Engineering Ltd for replacement assistance. If contaminants or liquid has carried over the sample system, refer to page 58. Humidifier needs to either be repaired or replaced. Consult Envent Engineering Ltd. Install a higher rated check valve. Consult "Aperture Strip" on page 20 for aperture size and contact Envent Engineering Ltd to order aperture and for assistance to install new aperture and recalibrate analyzer. Refer to "H 2 S Gas Calibration" on page 54 If contaminants or liquid has carried over the sample system, refer to page 58. Check there is no blockage on the vent and/or eductor. Check for vacuum in Eductor block Vent tubing and fittings should be 316 stainless steel 3/8'' or larger on a downward slope. Possible heat trace required. Clean sample chamber, aperture and window; replace if required. Contact Envent Engineering Ltd for replacement assistance. Aperture out of place or not Remove the sample chamber, unscrew the optimized for required range sensor block and check that the aperture is not out of place. Consult "Aperture Strip" on page 20 for aperture size and "H 2 S Gas Calibration" on page 54. Contact Envent Engineering Ltd to order aperture (if applicable) and for assistance to install new aperture and re-calibrate analyzer. Continued on next page Envent Engineering Ltd. Page 61 Revision 2.1

69 H 2 S Readings Issues (Cont d) Problems Possible Reasons Possible Solutions Sensor/ sensor wire failure Re-zero the sensor block. Refer to "Re-zero Sensor Procedure" on page 55. If procedure fails, sensor or sensor wire may require replacement. Gain set too high Gain is too high for the current setup. Recalibrate analyzer and refer to current gain (from factory). The difference between factory gain and new gain should not be greater than +/- 2%. If necessary, do a gas calibration. Refer to "H 2 S Gas Calibration" on page 54 Higher than required pressure/flow Adjust pressure regulator to 15psig and flow meter to "2" Dilution canister tubing loose (Dilution option only) Tubing inside the canister leaking. Open canister (follow all safety procedures to bleed out all high H 2 S level concentrations) and re-connect the tubing to the fittings on canister lid. Contact Envent engineering Ltd Lower than Expected Readings Total Sulfur's Hydrogen flow was decreased at the flow meter (Total Sulfur option only) Leaks in the sample system causing lower readings Flow is too low Gain set too low for replacement if required. The flow of hydrogen being mixed with sample gas has been decreased. Either the hydrogen bottle is empty, or the flow was decreased through the flow meter knob. Adjust back to appropriate flow rate. Do a leak check on the sample system and humidifier. Use Snoop to detect the possible leaks in the system. Make sure that the flow of sample gas coming into the analyzer is set to "2" (83.63 cc/min) at the flow meter. Gain is too low for the current setup. Recalibrate analyzer and refer to current gain (from factory). The difference between factory gain and new gain should not be greater than +/- 2%. If necessary, do a gas calibration. Refer to "H 2 S Gas Calibration" on page 54 Continued on next page Envent Engineering Ltd. Page 62 Revision 2.1

70 H 2 S Readings Issues (Cont d) Problems Possible Reasons Possible Solutions Not using the humidifier or humidifier leaking A humidifier is not necessary if the sample gas inlet is already humidified. If the sample gas inlet is dry, a humidifier must be used. Make sure the humidifier unit is placed and installed correctly. Please refer to "Humidifier Unit" on page 22. Sensor/ sensor wire failure Dilution Instrument air or carrier gas flow was increased (Dilution option only) Hydrogen flow has been increased (Total Sulfur option only) Humidifier Leaking: it needs to either be repaired or replaced. Consult Envent Engineering Ltd. Re-zero the sensor block. Refer to "Re-zero Sensor Procedure" on page 55. If procedure fails, sensor or sensor wire may require replacement. If the instrument air or the carrier gas is increased in flow, the readings will be lower. Make sure to keep a constant flow and pressure for the instrument or carrier gas. Lower the hydrogen flow to the specified on the flow meter. Envent Engineering Ltd. Page 63 Revision 2.1

71 H 2 S Sensing Tape Issues Problems Possible Reasons Possible Solutions Tape does not advance No tension on take up reel Check setscrew in take up reel collars, if loose; tighten up with a 1/16" hex key. Do a manual advance on H 2 S sensing tape. To do a motor run: Display>Press Menu Button until "MTR Run">Press right button. This will activate the motor and move the Tape breaking High liquid content in sample gas H 2 S Sensing tape for a few seconds. Genie probe and additional filtration may be required in sample conditioning system. Overlapping Stains Excessive H 2 S sensing Tape consumption Feed wheel not spinning freely Tape cover wheels pressing against H 2 S sensing tape Trigger slide not seated properly This is normal in the 1st 1/4 of a new H 2 S sensing tape. It should not cause any reading problems. Sample vent either blocked or frozen Contaminants in sample chamber H2S Sample inlet constantly being out of range from original analyzer intent Aperture out of place Dust and refuse build up between feed wheel and chassis. Requires removal and cleaning of chassis. H 2 S sensing tape cover wheel became warped. Needs to be flattened to not contact tape when on feed wheel bolt. If replacement needed, consult Envent Engineering Ltd. Ensure trigger slide is seated in groove of sample chamber. If it is causing reading problems, the "stop threshold" can be modified from 1,000,000 to 500,000. Please consult Envent Engineering Ltd before proceeding with this change. Check there is no blockage on the vent and/or eductor. Vent tubing and fittings should be 316 stainless steel 3/8'' or larger on a downward slope. Possible heat trace required. Clean sample chamber. Replace aperture and window if required. Contact Envent Engineering Ltd for replacement and assistance. If the H2S sample inlet is greater than the range of the analyzer, the tape will be consumed after than in normal operation. Take out the sample chamber, unscrew the sensor block and check that the aperture is not out of place. If so, refer to "Aperture Strip" on page 20 for aperture size and "H 2 S Gas Calibration" on page 54. Continued on next page Envent Engineering Ltd. Page 64 Revision 2.1

72 H 2 S Sensing Tape Issues (Cont d) H 2 S sensing Tape coming out of sample chamber/trigger slide Sensor/ sensor wire failure Trigger slide not seated properly Try re-zeroing the sensor. Refer to "Re-zero Sensor Procedure" on page 55. If procedure fails, Sensor or sensor wire may require replacement. Ensure trigger slide is seated in groove of sample chamber Electronics Issues Problems Possible Reasons Possible Solutions Fault LED (Sensor High) Incorrect zeroing Make sure the H 2 S Sensing tape is installed properly and do a motor run. To do a motor run: Display>Press Menu Button until "MTR Run">Press right button. This will activate the motor and move the H 2 S Sensing tape for a few seconds. The alarm should clear. Faulty Sensor Sensor needs to be replaced. Contact Envent Fault LED (Sensor Low) Sensor did not zero on white H 2 S sensing tape because H 2 S sensing tape came out of sample chamber slot Engineering Ltd for replacement. Re-install H 2 S Sensing tape. Refer to "H 2 S Sensing Tape Change Procedure" on page 57 or on sticker in the analyzers door. Re-zero sensor block. Refer to Refer to "Rezero Sensor Procedure" on page 55. Sensor/ sensor wire failure Re-zero the sensor block. Refer to "Re-zero Sensor Procedure" on page 55. If procedure fails, sensor or sensor wire may require replacement. Continued on next page Envent Engineering Ltd. Page 65 Revision 2.1

73 Electronics Issues (Cont d) Problems Possible Reasons Possible Solutions IS Barrier failure (For 330S analyzer series only) IS Barrier may need replacement. Consult Envent Engineering Ltd. Contaminants in sample chamber Clean sample chamber. Replace aperture and window if required. Contact Envent Engineering Ltd for replacement and Fault LED (Low H 2 S sensing Tape) Fault LED (Low Pressure) Fault LED (Oven Fail) New H 2 S sensing tape is required Low H 2 S sensing tape sensor failure Pressure of sample gas is lower than setpoint of pressure switch (factory set to 10 psi descending) Pressure switch failed Pressure regulator failed Fuse not installed. Oven not working properly assistance. H 2 S Sensing tape requires change (Average of 2 to 3 days left, from the moment alarm goes off, for the tape to be completely used up). Refer to "H 2 S Sensing Tape Change Procedure" on page 57 or on sticker in the analyzers door. If the alarm does not clear once a new H 2 S sensing tape is installed, the low H 2 S sensing tape sensor or its wires have failed and need to be replaced. Consult Envent Engineering Ltd to order a replacement. Low H 2 S sensing Tape Sensor Part #: A Inspect the sample inlet upstream to troubleshoot the problem. If pressure is above 10 psi and alarm continuous, the pressure switch setpoint might have changed. Set back to 10 psi descending. Also, check pressure switch wiring If the problem persists, pressure switch might need replacement. Contact Envent Engineering Ltd. The problem might be coming from the pressure regulator. Troubleshoot and consult Envent Engineering Ltd. Fuse for furnace does not come installed in the controller board. Please check spare fuse bag and install fuse. Oven failed and temperature has dropped below the optimal temperature. Please consult Envent Engineering Ltd. Blank Display Contrast needs adjustment Change contrast by turning the potentiometer in the display board. Continued on next page Envent Engineering Ltd. Page 66 Revision 2.1

74 Electronics Issues (Cont d) Problems Possible Reasons Possible Solutions Analyzer not communicating with PC Check that the analyzer is ON. Multiple reasons could be causing the analyzer to not communicate properly with the PC. Check that the communication cable is properly connected. Analyzer not turning ON Red LED on Sensor Block Blown fuse Controller board Malfunction Not using the appropriate voltage rating Sensor block fault Wiring not done properly If the software application was open before connecting the communication cable from the analyzer to the computer, close the software and re-open it. Try again and enable communication. Check fuse in the controller board. Replace if required. Consult Envent Engineering Ltd for a controller board replacement. Make sure to use the appropriate voltage to power the analyzer. DC controller boards can be powered with VDC and AC controller boards can be powered with 110 to 240 VAC. Keep in mind that if solenoids are controlled by the controller board, the voltage must match the solenoids voltage rating. Re-zero sensor block. Refer to "Re-zero Sensor Procedure" on page 55. Check for green status led on sensor block once procedure is done. If sensor LED stays red, consult Envent Engineering Ltd for a replacement. Make sure the wiring is done correctly. Analog Outputs (4-20 ma) not working Not using an external power The analog outputs in the controller board supply are loop powered and not self-powered unless AO boards were installed as per customer request. If AO boards were not requested, an external power supply must be used. Refer to "Analog Outputs" on page 16 to see different wiring options. Continued on next page Envent Engineering Ltd. Page 67 Revision 2.1

75 Electronics Issues (Cont d) Problems Possible Reasons Possible Solutions The system variable for output has been modified. By factory configuration, the analog outputs (1 & 2) are configured to output based on H 2 S Sample 1. Make sure that if they are modified, that the right system variables are Not coming out of alarm Alarms are latched The analyzer is actually in alarm Sample Conditioning System Issues selected. If alarms are latched, they need to be acknowledged. Go to the display> cycle through until "ACK" is reached> press the right button to acknowledge all latched alarms. To deactivate the latching on any alarm, use the ICE software, and connect to the analyzer and de-select latching on any alarm that is latched. Make sure the alarm setpoint values are as desired and that the analyzer is below (or above like temperature setpoint) those setpoint values. Problems Possible Reasons Possible Solutions Liquid Carried over in SCS Sample too wet for current conditioning sample system. If a one-time occurrence: Cleaning required for sample system, refer to "Sample Conditioning System Cleaning Procedure" on page 58. Regulator not maintaining 15 psi (erratic H 2 S readings) Problems with the Regulator (over pressured) If more than one time occurrence: Sample conditioning system may need a system for wet/dirty sample gas (extra filters set as coalescing, add liquid float stops, etc.). Consult Envent Engineering Ltd. Replace Regulator, Consult Envent Engineering Ltd. Liquid carried over into Consult Envent Engineering Ltd. regulator Problems with the (50 psi) Heated regulator may be required if liquid sample pre-regulator at the hydrocarbon carry over is present at the preregulation sample. sample point. Continued on next page Envent Engineering Ltd. Page 68 Revision 2.1

76 Sample Conditioning System Issues (cont d) Problems Possible Reasons Possible Solutions Pressure gauge not working Over pressured gauge Replacement is required. Consult Envent Engineering Ltd for replacement. Flowmeter not Liquid carried over into Consult Envent Engineering Ltd. working flowmeter Frozen humidifier Analyzer is being exposed to temperatures below 0 degress C (or - 2 degress C if 5% acetic acid is used) Do not expose analyzer to temperatures below 0 degress C or - 2 degress C Humidifier leaking liquid The humidifier body cracked - Could be due to extreme temperature changes. Calibration Issues A replacement may be required. Consult Envent Engineering Ltd for a replacement. Problems Possible Reasons Possible Solutions Change gain more than +/- 25% from original gain after calibration Not using the right calibration bottle Make sure the calibration bottle is within analyzer range. It is recommended that calibration gas used is close in value to where the alarm setpoint values need to be (for more accuracy). Envent Engineering Ltd. Page 69 Revision 2.1

77 APPENDICES Modbus Registry Please note that due to differences in PLC's, these registries may be shifted by one value. These can be modified if necessary using the H 2 S software. Coils MODICON 32-bit Standard protocol Enron Protocol Discrete Output 1 Solenoid Discrete Output 2 Solenoid Discrete Output 3 Solenoid Discrete Output 4 Solenoid Discrete Output 5 Relay Discrete Output 6 Relay Discrete Output 7 Relay Discrete Output 8 Relay Discrete Output 9 Virtual Output Discrete Output 10 Virtual Output Discrete Output 11 Virtual Output Discrete Output 12 Virtual Output Discrete Output 13 Virtual Output Discrete Output 14 Virtual Output Discrete Output 15 Virtual Output Discrete Output 16 Virtual Output MODICON 32-bit Floating Point Standard protocol Enron Protocol Sample Current Value (H 2 S) Sample RRA (H 2 S) Analog Input Sensor Board Temperature ( C) Board Temperature ( F) Envent Engineering Ltd. Page 70 Revision 2.1

78 Recommended Spare Parts List Part Number Quantity Description Eductor Block (330063D for SDS) 1 Humidifier Rebuild kit c/w Elbows, Nafion Tube, ftg Rear Window & Gasket or (2 for SDS) Aperture Strip (Associated to measurement range) liter Containers of Acetic Acid XS ' Lead Acetate Tape (H 2 S Sensing Tape) Box of 10 Micro Filter Glass Fiber Element 12/ CSK '' Chubby Quartz Tube (Total Sulfur option only) TS Ceramic Heater (Total Sulfur option only) Kalrez O-rings (Total Sulfur option only) Tubing, Cleaner, Fittings Maintenance Kit Chico A Sealing Compound: For sealing fittings in Hazardous Locations Envent Engineering Ltd. Page 71 Revision 2.1