Oxygen Detector. User Manual. Document No Rev B

Transcription

1 Oxygen Detector User Manual Document No Rev B Sensidyne, LP th Circle N, Suite 100 St. Petersburg, Florida USA [fax] web: info@sensidyne.com

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3 How to Use This Manual SensAir Oxygen Gas Detector This manual is a guide for using the SensAir Oxygen Detector. It contains information on the detector, detector components, and the Normal Operation Display. It also shows how to mount and wire the detector, initial setup, and span calibration. In addition, it covers commonly used operations regarding alarms and relays. For reference, the entire menu structure is outlined in Appendix- Menu Map Because the SensAir Oxygen Detector is menu driven, it is important to become familiar with how the magnetic switch controls are used to navigate through the menus, select specific menu items, and change the many different parameters available to the user. The Menu Map in the Appendix will help you toward this end. Sensidyne Document No (Rev B) 3

4 Table of Contents How to Use This Manual... 3 Packing List and Notices... 6 WARNINGS INTRODUCTION SENSAIR PART NUMBER SYSTEM COMPONENTS Condulet Housing Display Electronics The Sensor Assembly INSTALLATION Location Detector Installation (Enclosure) Detector Location Wiring Detector Wiring Diagram Allowable Line Length Wiring Procedure OPERATION Output Current Interferents START UP PROCEDURE CALIBRATION Equipment Select Calibration Gas Concentration Calibration Procedure MAINTENANCE Sensor replacement: Sensor Interface Assembly Replacement Sensidyne Document No (Rev B)

5 9 APPENDIX- MENU MAP APPENDIX- FAULT CODES APPENDIX- DIMENSIONAL DRAWINGS APPENDIX- CALIBRATION EQUIPMENT APPENDIX ACCESSORIES AND SPARES APPENDIX- SPECIFICATIONS SENSOR SPECIFICATIONS APPENDIX- ALLOWABLE LINE LENGTHS SENSAIR MODBUS REGISTER ADDRESSES (OPTION) SENSAIR MODBUS SPECIFICATIONS (OPTION) WIRING RELAYS (OPTIONAL) APPENDIX- TROUBLESHOOTING GUIDE RETURNED MATERIAL AUTHORIZATION Sensidyne Document No (Rev B) 5

6 Packing List and Notices You should have the following items: SensAir Oxygen Gas Detector unit Magnetic Screwdriver User Manual (this document) Always check to make certain you have received all of the items listed above. If you have any questions or need assistance, contact your Sensidyne Representative, or call or PROPRIETARY NOTICE This manual was prepared by Sensidyne, LP exclusively for the owner of the SensAir Oxygen Gas Detector. The material within this manual is the proprietary information of Sensidyne, LP and is to be used only to understand and operate the instrument. By receiving this document, the recipient agrees that neither this document nor the information disclosed within nor any part shall be reproduced or transferred, physically, electronically or in any form or used or disclosed to others for manufacturing or for any other purpose except as specifically authorized in writing by Sensidyne, LP. COPYRIGHT NOTICE 2014, Sensidyne, LP All rights reserved. Information contained in this document is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another program or system without prior written authorization from Sensidyne, LP TRADEMARK NOTICE Sensidyne, the Sensidyne logo, SensAlert, the SensAlert & SensAir logos, T-O-D & Test-on-Demand are registered trademarks of Sensidyne, LP. The trademarks and service marks of Sensidyne, LP are protected through use and registration in the United States of America. SOFTWARE LICENSE The software included with the SensAir Oxygen Detector is the property of Sensidyne, LP and shall remain the property of Sensidyne, LP in perpetuity. The software is protected by U.S. and international copyright laws and is licensed for specific use with the SensAir Oxygen Gas Detector. The user may not reverse-engineer, disassemble, decompile, or make any attempt to discover the source code of the software. The software may not be translated, copied, merged or modified in any way. The user may not sublicense, rent, or lease any portion of the software. The right to use the software terminates automatically if any part of this license is violated. DISCLAIMER SENSIDYNE, LP ASSUMES NO RESPONSIBILITY WHATSOEVER, TO ANY PARTY WHOSOEVER, FOR ANY PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH CAUSED BY OR RESULTING FROM, IN WHOLE, OR IN PART, THE IMPROPER USE, INSTALLATION, OR STORAGE OF THIS PRODUCT BY THE USER, PERSON, FIRM, ENTITY, CORPORATION OR PARTY NOT ADHERING TO THE INSTRUCTIONS AND WARNINGS OR NOT ADHERING TO ALL FEDERAL, STATE, AND LOCAL ENVIRONMENTAL AND OCCUPATIONAL HEALTH AND SAFETY LAWS AND REGULATIONS. THE SELLER SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR OTHER DAMAGES RESULTING FROM THE SALE AND USE OF ANY GOODS AND SELLER S LIABILITY HEREUNDER SHALL BE LIMITED TO REPAIR OR REPLACEMENT OF ANY GOODS FOUND DEFECTIVE. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR USE OR FOR A PARTICULAR PURPOSE WHICH ARE EXPRESSLY DISCLAIMED. 6 Sensidyne Document No (Rev B)

7 WARNINGS READ AND UNDERSTAND ALL WARNINGS BEFORE USE Read and understand ALL warnings before using this product. Failure to read, understand, and comply with ALL warnings could result in property damage, severe personal injury, or death. Product is calibrated prior to shipment, however, this product must be calibrated prior to initial use. Calibrate at regular intervals in accordance with the User Manual. Failure to calibrate in accordance with the instructions in this manual and at the specified intervals may result in the product not operating properly or malfunctioning. Read and understand ALL applicable federal, state, and local environmental health and safety laws and regulations, including OSHA. Ensure complete compliance with ALL applicable laws and regulations before and during use of this product. The user/installer must understand the Hazardous Area Protection Concepts and Area Classifications applicable to their operation. UNDER NO CIRCUMSTANCES should this product be used except by qualified, trained, technically competent personnel and not until the warnings, User Manual, labels, and other literature accompanying this product have been read and understood. Failure to read and understand the User Manual may result in preventable severe personal injury or death. ALWAYS wash your hands thoroughly after handling, calibrating, or servicing this product. ALWAYS wear eye protection (such as safety goggles), face shield, chemical resistant gloves and chemical resistant clothing when handling chemicals, or calibration sources. DO NOT get chemicals, gases, fumes, or vapors in your eyes or on your skin, as they may cause severe burns to skin and eyes. If chemicals, gases, fumes, or vapors get in your eyes or on your skin, wash the affected area with copious amounts of water and call a physician immediately. ALWAYS avoid any contact of acids with your skin or eyes. Seek immediate medical attention for any contact with acids. ALWAYS calibrate in a well-ventilated area. Adequate precautions should be taken to prevent the buildup of ANY calibration sources or vapors. Avoid breathing ANY calibration fumes or vapors as they may be hazardous to your health. ALWAYS dispose of chemicals and calibration sources in compliance with ALL applicable safety laws, regulations, and guidelines for proper disposal. Failure to do so may result in environmental damage, property damage, personal injury or death. ALWAYS close ALL containers of chemicals used with this product after use. ALWAYS ensure that any compressed calibration substance sources are empty prior to disposal, should they be used. ALWAYS use clean, dry, inert materials to contain and transfer substances used for calibration. DO NOT remove, cover, or alter any label or tag on this product, its accessories, or related products. DO NOT operate this product should it malfunction or require repair. Operation of a malfunctioning product, or a product requiring repair may result in serious personal injury or death. DO NOT attempt to repair or modify instrument, except as specified in the Operation & Service Manual. If repair is needed, contact the Sensidyne Service Dept. to arrange for a Returned Material Authorization (RMA) Returned Material Authorization Users should refer to MSDS and suppliers instructions for proper handling and safety instructions for any chemicals used with this equipment. Sensidyne Document No (Rev B) 7

8 WARNINGS READ AND UNDERSTAND ALL WARNINGS BEFORE USE Use ONLY genuine SENSIDYNE replacement parts when performing any maintenance procedures described in this manual. Failure to do so may seriously impair instrument performance and affect Certification. Repair or alteration of the product beyond the scope of these maintenance instructions, or by anyone other than an authorized SENSIDYNE service technician, could cause the product to fail to perform as designed and persons who rely on this product for their safety could sustain severe personal injury or death. The product is intended for non-hazardous locations and is not intended as a life safety device. It is intended to detect gas and act as a warning signal for the protection of personnel or building structures. The SensAir Oxygen Gas Detector is an ambient air monitoring device. Restricting the access of ambient air to the sensor may result in less than optimal monitoring performance. Prolonged exposure to excessively high concentrations of gas may cause the sensor to produce erroneous readings. Always make use of a rainshield to protect against variations caused by environmental conditions. Perform tests only within the specified operating ranges. Sudden changes in pressure may cause temporary fluctuations in the sensor reading. Important Calibration Considerations: Unit calibration must be done at altitude. Verify concentration of calibration gas before making calibration adjustments. Concentration can be altered by: Deterioration of the concentration of compressed calibration gas sources during storage. Interaction of the calibration gas with materials used to contain and transfer the gas, as for example, absorption onto and permeation through certain plastics. Interaction of the calibration gas with materials and/or ambient contaminants, as for example, absorption into water. If further translation is required, please contact the Sensidyne EU Authorized Representative (see Back Cover for contact information). 8 Sensidyne Document No (Rev B)

9 1 INTRODUCTION This manual provides specific information concerning the installation, operation, calibration, and maintenance of the SensAir Oxygen Gas Detector. IMPORTANT: Owners of the Oxygen Gas Detector must read this manual in its entirety in order to ensure proper operation of the detector. The SensAir Oxygen Gas Detector is general purpose, single-point device for detection of oxygen deficiency.. The detector detects each substance in %volume. The detector consists of a display board and a power supply board housed in a heavy duty enclosure, a sensor specifically designed to detect Oxygen. Relay board is optional. A complete monitoring system consists of the detector and a separate read-out device & Class 2 power supply capable of monitoring a 4-20 ma output and supplying Vdc power. Product specifications are located in Appendix B. Different versions of the detector are available (see Part Number Table). The selection of the version best suited to an application depends upon the application requirement. PVC and Anodized aluminum are for general purpose and heavy duty industrial applications. Sensidyne Document No (Rev B) 9

10 2 SensAir Part Number System SensAir Toxic/Oxygen Transmitters R 0 8 DIV DIV GP 1 1 GP Plastic 0 1 Oxygen (O2) 0 2 Hydrogen Sulfide (H2S) 50ppm 0 3 Hydrogen Sulfide (H2S) 100ppm 0 4 Ammonia (NH3) 50ppm 0 5 Ammonia (NH3) 100ppm 0 6 Ammonia (NH3) 300ppm 0 7 Carbon Monoxide (CO) 100ppm 0 8 Carbon Monoxide (CO) 500ppm 0 9 Carbon Monoxide (CO) 1000ppm 1 0 Chlorine (Cl2) 5ppm 1 1 Clorine (Cl2) 10 ppm 1 2 Hydrogen Chloride (HCl) 10ppm 1 3 Hydrogen Chloride (HCl) 100ppm 1 4 Nitrogen Dioxide (NO2) 10ppm 1 5 Hydrogen (H2) 1000ppm 1 6 Hydrogen Cyanide (HCN) 20ppm 1 7 Hydrogen Fluoride (HF) 10ppm 1 8 Sulfur Dioxide (SO2) 20ppm 1 9 Chlorine Dioxide (ClO2) 5ppm 1 Display 2 No Display 0 No Options 1 MODBUS/Relay 2 BacNet 3 Other 1 Horizontal 2 Vertical 1 Stainless Steel Sensor Holder w/mesh 2 Stainless Steel Sensor Holder w/disk 3 Aluminum Sensor Holder w/disk 4 Aluminum Sensor Holder w/ Poly Screen 5 Gray PVC Sensor Holder w/ Poly Screen 10 Sensidyne Document No (Rev B)

11 3 Components 3.1 Condulet Housing The condulet housing is a heavy duty weather-resistant barrier between the electronics module and the ambient environment. The housing is available with a window for the display of the detector or without the window (in the aluminum enclosure). An o-ring on the condulet seated between the condulet cover and the base provides water-tight protection for the internal electronic components. It allows the detector to be used outdoors during inclement weather conditions. 3.2 Display The detector with display has Program and Up / Down selector magnetic switches. These are controlled via the magnetic screwdriver provided with the unit. Information on operating the various controls is located in the Appendix Menu Map. The display shows the following: (1) Gas Concentration The gas concentration is displayed in large characters; units of measure are %volume. (2) PROGRAM Control (Switch) The Program switch is used to enter the programming menu. The switch is also used to select/save a menu item. (3) and The and control arrows are used to scroll up or down a list of items. These controls are also used to increase or decrease a value (such as an alarm setpoint). Holding the wand near the control (switch) causes the displayed value to either increase or decrease automatically. (4) LEDs The detector display has LEDs that light up when there is an alarm or fault condition occurring. Also, when the magnetic wand is brought close to a magnetic switch the LED associated with that switch lights up, confirming that contact has been made between the wand and the switch. The detector without display requires the use the Hand Held Display to program and calibrate the unit. The Hand Held Display unit is sold separately. Part number for the Hand Held Display is R. This detector is for unclassified areas, however, prior to using the Hand Held Display, confirm the area is free of hazardous gases. Please confirm the area is free of hazardous conditions prior to opening the enclosure on the SensAir Oxygen detector. The hand held display connects to the main board in the detector. Caution should be taken when plugging the display connector to the board. The connector is keyed and only installs one way. Once attached, it functions the same as the detector with display. Sensidyne Document No (Rev B) 11

12 Connection Port for Hand Held Display unit. Connection is Keyed. Can only be plugged in one way. 12 Sensidyne Document No (Rev B)

13 3.2.1 Electronics SensAir Oxygen Gas Detector The electronics inside the condulet consist of a display board (if installed), a power supply board and optional relay board. They are housed within the condulet, and converts the sensor response into a 4-20 ma current, linearly proportional to the concentration of the gas present at the sensor. 3.3 The Sensor Assembly CAUTION: DO NOT attempt to install the sensor assembly into any detector other than the designated SensAir Oxygen Gas Detector. The sensor assembly consists of an electrochemical sensor. Oxygen sensors are electrochemical sensors designed to respond to the presence of a specific gas. Gas molecules permeate the sensor membrane and initiate an electrochemical reaction in the sensor. The sensor assembly consists of sealed sensor attached to a circuit board. A female connector mounted on top of the circuit board mates with a male connector mounted inside the sensor interface assembly. WARNING: The sensor CANNOT be used to monitor for combustible hazards. Sensidyne Document No (Rev B) 13

14 4 Installation 4.1 Location The Oxygen Gas Detector is a local area monitor. It is imperative that the detector be located in an area where the greatest concentration of a gas that will displace the oxygen will be present in the shortest period of time after the occurrence of a leak.. Expert consultation may be necessary to determine the most strategic location for optimum monitoring. In all circumstances, the plant safety officer or other appropriate personnel should be consulted before installation. Site determination, at a minimum, must consider the following factors: most probable location of a leak physical properties of the target gas air convection in the area due to ventilation or ambient conditions operational environment presence of interferent gases Ultimately, monitoring efficiency, and the degree of protection it affords, depends upon how carefully this survey is made. 4.2 Detector Installation (Enclosure) Refer to all local electrical codes to ensure compliance for proper mounting. The detector mounts to a wiring conduit via (19 mm) 3/4 female NPT at the condulet. To achieve a measure of RFI/EMI immunity, the enclosure and conduit must be grounded and shielded cable must be used. The detector should be mounted with the sensor facing down to prevent moisture and debris from collecting on the sensor itself. 1) Get confirmation from the safety officer that the area is free of hazardous atmospheres. This detector is intended for general purpose areas so hazardous gases should not be present. 2) For the Blue Metal enclosure: Unscrew and remove the condulet cover. For the Plastic Square enclosure: Remove the four corner screws to remove the cover. 3) Confirm that the input and output wires are without power and thread them through the opening of the housing. 4) Hold the wires out of the way and screw the condulet firmly into the conduit. 5) Cap the wires and replace the transmitter cover. For the Plastic Square enclosure, secure all four corner screws that were removed if you are not going to wire the detector at this time. 14 Sensidyne Document No (Rev B)

15 4.3 Detector Location Wiring Refer to all local electrical codes to ensure proper wiring compliance. The use of shielded wire is recommended. NOTE The power supply must have a power source return isolated from earth ground. A Class 2 power supply must be used. Shielded cable is recommended with shield terminated to earth ground to ensure a measure of RFI/EMI immunity. If the metal conduit to which the detector is mounted is not earth grounded, the condulet must be earth grounded via the green wire. The following sections provide specific information necessary to wire the detector to a Class 2 power supply. A wiring diagram is provided to aid in wiring the detector to a power supply. Three (3) wires are required to connect the detector to a Sensidyne controller, or a customer supplied Vdc Class 2 power supply and read-out device. See Figure for wiring. Bottom of Main PCA board showing Black, White and Red Wire connected Detector Wiring Diagram NOTE Installation and wiring must be in accordance with National Electrical Code. Temperature rating of cable wire insulation must be specified to be above 75 C (167 F). If cable runs through temperatures which exceed 75 C, it should be specified for that environment. 3-Wire Powered Unit Power V+ Red 4-20 Output 4-20 ma White Ground RTN Black Sensidyne Document No (Rev B) 15

16 FIGURE DETECTOR WIRING Allowable Line Length The maximum distance between the Class 2 power supply and the detector is known as the allowable line length. It is a function of the power supply voltage, loop resistance, and termination resistance. This in turn determines allowable loop resistance and wire size. Please refer to the table in the Appendix for the allowable line lengths for various wire sizes as well as the allowable loop resistance for various power supply voltages. The allowable voltage range for the power supply is Vdc. 16 Sensidyne Document No (Rev B)

17 4.3.3 Wiring Procedure The detector terminals will not accept wire gauges larger than 14 AWG. 18 AWG is recommended as it is less rigid. In all cases, the connections must be clean, tight and protected from the weather. They must meet all required electrical codes. Wire the detector as follows: 1) Get confirmation from the safety officer, or appropriate personnel, that the area is safe. 2) Verify that the conduit and the detector are securely connected together. 3) Verify that the input and output wires are (without power). 4) Unscrew and remove the condulet cover on the blue metal enclosure, or on the square plastic enclosure, remove the four corner screws to pull off the cover. 5) Verify that the total resistance of the wiring does not exceed the allowable loop resistance 6) Attach and secure the power source return (negative lead) wire to the RTN Terminal (3) on the J1 connector. 7) Attach and secure the 4-20 ma output wire to the 4 20 ma Terminal (2) on the J1 connector. 8) Attach and secure the positive lead wire to the V+ Terminal (1) on the J1 connector. 9) Replace the condulet cover if not proceeding with start-up at this time. 10) Before applying power to the detector, verify that all connections are correct. 11) Go to Start-Up Section when you are ready to perform the start-up procedure. Sensidyne Document No (Rev B) 17

18 5 Operation NOTE: The detector must be calibrated after initial installation and before normal operation is possible. (See Calibration Section) Sensidyne oxygen gas detection equipment is functionally tested and calibrated with known 20.9% vol oxygen gas before shipment to the customer. However, it is recommended that qualified personnel verify operation after initial installation using known 20.9% vol oxygen gas. Repeat verification at 30 days and 60 days after initial installation, with deviations in span recorded. The calibration or functional check interval can then be adjusted to suit that application s conditions. For further information, please consult the ISA Recommended Practices for gas detectors. Under normal operating conditions, the detector responds to the presence of gas by producing a 4-20 ma current that is linearly proportional to the concentration of gas present at the sensor. 5.1 Output Current When calibrated, the relationship between the output current of the detector (in ma) and the concentration of the oxygen gas is linear. Concentration is shown as a Percentage of Full Scale. 5.2 Interferents Although highly selective for a particular gas, a sensor is not always completely specific. Certain sensor types will also respond to another gas, particularly if the other gas has similar physical/chemical properties. This other gas is called an interferent. Every effort is made to identify and minimize these interferences. Helium is a known interferent with the oxygen sensor. 18 Sensidyne Document No (Rev B)

19 6 Start Up Procedure It is necessary to perform the following start up procedure upon initial installation. Performance of the startup procedure is not ordinarily required at the time of routine periodic calibration. However, the startup procedure should be performed when any of the following occurs: loss of power for an extended period time upon sensor assembly replacement following a flooded response 1) Unscrew and remove the condulet cover. WARNING: The safety officer must ensure that the area is safe before the condulet may be opened. 2) Make certain the detector has been wired properly. 3) Apply power to the detector. Observe that the Display has proper indications. If the Display does not have proper indication go to Appendix Troubleshooting Guide to determine the cause of the problem. CAUTION: Do not continue with the start-up procedure until this problem has been corrected. 4) Allow the detector to warm up.. 5) Replace the condulet cover. Allow the unit to stabilize for at least 1 hour before calibrating the detector 6) The Oxygen Gas Detector must be calibrated prior to initial use and at regular intervals thereafter. In addition, the calibration procedure must be performed if any of the following conditions occur: loss of power for an extended period of time detector is overranged or flooded sensor assembly is replaced Failure to maintain this schedule could result in impaired system performance and/or erroneous readings. NOTE If calibration is being performed prior to initial use or after sensor replacement, the detector must be allowed to stabilize with power applied for 1 hour before attempting the calibration procedure. All Sensidyne gas detection equipment is functionally tested and calibrated with known zero (except for oxygen sensors) and span gases before shipment to the customer. However, it is recommended that qualified personnel verify operation after initial installation using known zero (not applicable for oxygen) and span gases. For further information, please consult the ISA Recommended Practices for gas detectors. NSTALLAION Sensidyne Document No (Rev B) 19

20 7 Calibration 7.1 Equipment NOTE: The calibration procedure should be performed at ambient conditions including altitude, with special attention paid to the humidity and temperature requirements of the detector. Zeroing must be performed prior to Calibration. Calibration Gas Sensidyne offers a full line of equipment for properly calibrating the SensAir Gas Detector. Calibration equipment available for the Gas Detector is described below. Refer to Appendix Parts List for ordering information, and for a complete listing of available calibration equipment and accessories. Each calibration gas cylinder is shipped with an MSDS sheet (a NIST traceable calibration certificate also is available upon request). Regulator, part number (0.5LPM regulator is recommended.) Calibration Cup, part number Or if Sensor Shield is used, Cal Plug is pn Magnetic Screwdriver, part number Hand Held Display (if using the detector without built in display), part number Calibration Gas for Oxygen, 20.9% O2 in N2 (103L) Alarm Test Gas, 100% Nitrogen (103L) 7.2 Select Calibration Gas Concentration Using the magnetic wand: Hold Program for 2 seconds ZrO will appear Hold Down until GAS appears Hold Program for 2 seconds to select Saved Calibration Gas Concentration will appear Use Up and Down to adjust the Calibration Gas Concentration if needed Hold Program for 2 seconds to save new gas concentration 20 Sensidyne Document No (Rev B)

21 7.3 Calibration Procedure SensAir Oxygen Gas Detector Using the magnetic wand: Hold Program for 2 seconds ZrO will appear Hold Down for 1 second CAL will appear Hold Program for 2 seconds to select Down arrow LED will light (calibrating detector). To Escape calibration mode hold UP for 15 seconds Apply gas After 60 seconds of stable gas, Down arrow LED will go out and calibration is complete. Pass or Failure code will appear. Remove gas. Normal display will return after test gas dissipates. Sensidyne Document No (Rev B) 21

22 8 Maintenance The Sensidyne SensAir Oxygen Gas Detector electronics do not require any periodic maintenance unless a malfunction occurs. In the event of a malfunction, refer to Appendix Troubleshooting Guide. Use the Troubleshooting Guide to determine the cause of and remedy for common problems which may occur in the field. This section describes certain simple maintenance procedures that may be performed in the field. Field maintenance should be limited to: Sensor replacement The disposable sensor assembly should be replaced if it is damaged or when it no longer performs properly. 8.1 Sensor replacement: Remove power. Unscrew sensor holder cap Replace sensor Calibrate sensor to known span gas 8.2 Sensor Interface Assembly Replacement CAUTION: The safety officer must ensure that the area is safe before the condulet is opened. Remove power from the detector. Unscrew and remove the condulet cover. Disconnect the 8 colored wires from the sensor interface assembly on the electronics module PCB Remove the rainshield if one is attached. Unscrew and remove the old sensor assembly from the lower opening of the condulet. Discard/recycle the old assembly. Thread the eight colored wires from the new sensor interface assembly through the lower opening of the condulet. o Yellow o Red o Lavender o Green o Brown o Black o Blue o Orange 22 Sensidyne Document No (Rev B)

23 o Apply sealant to the threads of the new sensor assembly housing to ensure a watertight seal and prevent seizing. Silicone based sealant must never be used on or near these sensors. Conductive pipe dope is recommended. Screw the new sensor assembly firmly into place. Connect and secure the eight wires onto the electronics module PCB noting the wire designation. Top of Main PCA showing the connection to Display Board Make certain all wiring is secure. Replace and secure the condulet cover. Make certain the condulet o-ring is properly seated when tightening the condulet. Allow the detector to warm up for at least 1 hour. Sensidyne Document No (Rev B) 23

24 9 Appendix- Menu Map The setup and operation of the SensAir Oxygen is controlled by parameters and procedures that are accessed through the menu structure. Menu Map 1. Detector Modes 1.1. Calibration Hold Program for 2 seconds ZrO will appear Hold Down for 1 second CAL will appear Hold Program for 2 seconds to select Down arrow LED will light (calibrating detector), if Up held for 15 seconds escape calibration mode Apply gas, if Up held for 15 seconds escape calibration mode After 60 seconds of stable gas, the down arrow LED will go out (calibration completed) Pass or Failure Code will appear Remove gas Normal display will return after test gas dissipates Calibration Gas Concentration Hold Program for 2 seconds ZrO will appear Continue to hold Down until GAS appears Hold Program for 2 seconds to select Present calibration gas concentration will appear and High Alarm LED will light Using the Up / Down arrows the gas concentration will change once a second Hold Program for 2 seconds to save gas concentration, or no user action for 20 seconds and the gas concentration will revert to the previous value Unit will return to the normal screen Hold Current Loop Hold Program for 2 seconds ZrO will appear Continue to hold Down until HOd appears Hold Program for 2 seconds to select. 24 Sensidyne Document No (Rev B)

25 1.4. Adjust 4 20 ma current loop 4 ma setpoint Hold Program for 2 seconds ZrO will appear Continue to hold Down until A 4 appears Hold Program for 2 seconds to select Three dashes will appear and High Alarm LED will light Using the Up / Down arrows the 4 ma setpoint will change every 0.2 seconds Hold Program for 2 seconds to save the setpoint, or no user action for 20 seconds and the setpoint will revert to the previous value Unit will return to the normal screen Adjust 4 20 ma current loop 20 ma setpoint Hold Program for 2 seconds ZrO will appear Continue to hold Down until A20 appears Hold Program for 2 seconds to select Three dashes will appear and High Alarm LED will light Using the Up / Down arrows the 20 ma setpoint will change every 0.2 seconds Hold Program for 2 seconds to save the setpoint, or no user action for 20 seconds and the setpoint will revert to the previous value Sensidyne Document No (Rev B) 25

26 If Option Board is present the following menu items will be available Current Loop Fault Enable Hold Program for 2 seconds ZrO will appear Continue to hold Down until CUL appears Hold Program for 2 seconds to select If fault enabled, ECL will appear. If fault not enabled ncl will appear Holding Program for 2 seconds will change the state of the enable. From Enabled to Not Enabled or Not Enabled to Enabled No user action for 20 seconds and the state of enable will remain the same Low Alarm Set Point Hold Program for 2 seconds ZrO will appear Continue to hold Down until ALO appears Hold Program for 2 seconds to select Present Low Alarm Set Point will appear and Low Alarm LED will flash Using the Up / Down arrows the Low Alarm Set Point will change once a second. The limits are 19.5 to 15.0 %Vol or the minimum value of the Low Low Alarm setting Hold Program for 2 seconds to save the set point, or no user action for 20 seconds and the set point will revert to the previous value Low Low Alarm Set point Hold Program for 2 seconds ZrO will appear Continue to hold Down until ALL appears Hold Program for 2 seconds to select Present Low Low Alarm Set Point will appear and Low Low Alarm LED will Flash Using the Up / Down arrows the Low Low Alarm Set Point will change once a second. The limits are 19.5 to 15.0 %Vol or the maximum value of the Low Alarm setting Hold Program for 2 seconds to save the set point, or no user action for 20 seconds and the set point will revert to the previous value Low Relay Settings Hold Program for 2 seconds ZrO will appear Continue to hold Down until rlo appears Hold Program for 2 seconds to select If Low Relay Latching is enabled LAC will appear if not enabled nla will appear Holding Program for 2 seconds will change the state of enable. From Latching to Not Latching or Not Latching to latching No user action for 20 seconds and the state of enable will remain the same Hold Down to display Energize state of the Low Relay If relay is not energized nen will appear, if energized Enr will appear Holding Program for 2 seconds will change the state of the energize. From Energize to Not Energized or Not Energized to Energize No user action for 20 seconds and the state of the energize will remain the same. 26 Sensidyne Document No (Rev B)

27 1.10. Low Low Relay Settings this is strictly for the Oxygen Unit Hold Program for 2 seconds ZrO will appear Continue to hold Down until rll appears Hold Program for 2 seconds to select If Low Low Relay Latching is enabled LAC will appear if not enabled nla will appear Holding Program for 2 seconds will change the state of the enable. From Latching to Not Latching or Not Latching to Latching No user action for 20 seconds and the state of enable will remain the same Hold Down to display Energize state of the Low Low Relay If relay is not energized nen will appear, if energized Enr will appear Holding Program for 2 seconds will change the state of the energize. From Energize to Not Energized or Not Energized to Energize No user action for 20 seconds and the state of the energize will remain the same Adjust Modbus Address Hold Program for 2 seconds ZrO will appear Continue to hold Down until AdS appears Hold Program for 2 seconds to select Present Modbus address will appear and High Alarm LED will flash Using the Up / Down arrows the Modbus address will change once a second. The limits are 1 and Hold Program for 2 seconds to save the address, or no user action for 20 seconds and the address will revert to the previous value Unit will return to the normal screen Adjust Modbus Baud Rate Hold Program for 2 seconds ZrO will appear Continue to hold Down until bau appears Hold Program for 2 seconds to select Present Modbus baud rate will appear and High Alarm LED will flash Using the Up / Down arrows select the desired baud rate from the 3 selections (9.6 for 9600, 19.2 for 19200, or 38.4 for 38400) Hold Program for 2 seconds to save the baud rate, or no user action for 20 seconds and the baud rate will revert to the previous value Unit will return to the normal screen. Sensidyne Document No (Rev B) 27

28 10 Appendix- Fault Codes F00 Not Assigned F01 Sensor Failed, Oxygen unit reverts to 0.0 on the display F02 Cal Mode Calibration Fail, outside gain range F03 Cal Mode Gas not present after 5 minutes, User aborted calibration F04 Cal Mode Gas not stable after 5 minutes, User aborted calibration F06 Missing Sensor 28 Sensidyne Document No (Rev B)

29 11 Appendix- Dimensional Drawings SensAir Oxygen Gas Detector Sensidyne Document No (Rev B) 29

30 30 Sensidyne Document No (Rev B)

31 12 Appendix- Calibration Equipment Product Number Description SensAir Oxygen Gas Detector Regulator (0.5 LPM), for use with all gases PVC Carrying Case (holds two gas cylinders, plus regulator, tubing & fitting) Calibration Cup Calibration Plug, used when a sensor shield is installed Tygon Tubing, 3/16 ID x 5/16, sold per foot, not for use with reactive gases Teflon Tubing, sold per foot, (recommend 3ft for cal, Use with Cl2, HCL, HF, NO2, SO2) Cylinder Recycling Tool Calibration and alarm Gases Product Number Description Alarm gas, 100% Nitrogen (103L) Calibration gas for Oxygen unit, 20.9% O2 in N2 (103L) Sensidyne Document No (Rev B) 31

32 13 Appendix Accessories and Spares Product Number Description R Sensor Shield R Calibration Cup Calibration Plug, when sensor shield is used R Flow Block R Duct Mount R Hand Held Display Regulator, 0.5LPM R R Option PCA Field Install, Alum. Enclosure Option PCA Field Install, Plastic Enclosure 32 Sensidyne Document No (Rev B)

33 14 Appendix- Specifications Sampling System... Diffusion Detection Range %volume Housing... Aluminum condulet, or General Purpose Polycarbonate Weight lbs [1.7Kg] Electrical Specifications Power Requirement... Class 2, 24 Vdc, nominal, 125 ma Voltage Volts DC Current Maximum mA, typical 125mA Termination Resistance... < 500 (250 recommended) Grounding... Condulet must be earth grounded via conduit Transmission Link ma current, non-isolated 3 wires Classification/Certification Explosion-Proof Rating... Not rated Intrinsic Safety Rating... Not Rated Relay Specifications (if option board installed): Maximum 30V AC/DC Maximum Current: 4Amps Sensidyne Document No (Rev B) 33

34 15 Sensor Specifications Sensor Specifications Minimum Indicated Concentration % O2 Minimum Indicated Conc. change % O2 Accuracy... ±0.1% 20.9% O2 (when calibrated with 20.9% O2) Accuracy... ±0.2% 18% O2 Span Drift... < 5% loss/year (Typical) Response Time (Rise)... T90 < 9 sec., T50 < 6 sec. Recovery Time (Fall)... T10 < 30 sec Operating Temperature Range to 50 C (-4 to 122 F) Storage Temperature Range... 3 to 20 C (37 to 68 F) Operating Humidity Range % RH, non-condensing Operating Pressure Range... ambient atmosphere, +-1PSI Sensor Life (Expected)... Standard: 2 year from ship date, normal service Calibration Frequency... Monthly (recommended) Calibration Concentration % V O2 Calibration Flowrate LPM, recommended Oxygen Requirement... 1% by vol, minimum, sensors should not be stored with no oxygen present. Note: These are capillary style oxygen sensors optimized for use on oxygen/nitrogen atmospheres. Gases that alter the ambient gas density will produce erroneous oxygen readings, e.g. 5 % helium in the ambient will produce a false high oxygen reading. This is a gas density/diffusion effect rather than a chemical effect. These sensors are not recommended for atmospheres other than oxygen/nitrogen. Special Calibration Considerations: Zeroing The Sensor Ambient Oxygen sensors do not normally require zeroing and cannot be zeroed through the Calibration menu. Span Calibration It is recommended that this sensor be calibrated at 20.9 %vol. There are no special calibration considerations for this sensor. 34 Sensidyne Document No (Rev B)

35 16 Appendix- Allowable Line Lengths SensAir Oxygen Gas Detector Class 2 Power Supply Voltage (Vdc) 4-20mA Termination (Ohms) Allowable Loop Resistance (Ohms) Allowable Line Wire Gauge Allowable Line Length (Feet) Length (Meters) 14 27,000 8, ,000 5, ,600 3, ,050 1, ,200 1, ,400 7, ,700 4, ,200 2, ,200 1, , ,800 6, ,400 3, ,800 2, ,400 1, , ,200 4, ,200 3, ,350 1, ,600 1, , ,600 3, ,900 2, ,950 1, , , ,000 2, ,650 1, ,550 1, , ,400 1, ,400 1, , , , , Sensidyne Document No (Rev B) 35

36 SensAir Modbus Relay Option Board 36 Sensidyne Document No (Rev B)

37 Sensidyne Document No (Rev B) 37

38 4 wire connections and termination resistors SensAir Test Lead Color Modbus Master TB4-1 TXD-B Gray RXD-A TB4-2 TXD-A Violet RXD-B TB4-3 RXD-B Green TXD-A TB4-4 RXD-A Brown TXD-B No termination resistors: S1-1 Off S1-2 Off S1-3 Off S1-4 Off With termination resistors S1-1 On S1-2 On S1-3 Off S1-4 Off 2 wire connections and termination resistors SensAir Test Lead Color Modbus Master TB4-1 TXD-B Gray A TB4-2 TXD-A Violet B TB4-3 RXD-B Not Used Not Used TB4-4 RXD-A Not Used Not Used No termination resistors: S1-1 Off S1-2 Off S1-3 On S1-4 On With termination resistors: S1-1 On S1-2 Off S1-3 On S1-4 On 38 Sensidyne Document No (Rev B)

39 Sensidyne Document No (Rev B) 39

40 40 Sensidyne Document No (Rev B)

41 17 SensAir Modbus Register Addresses (option) If Option Board is present. Coils Start Zero Start Calibration Clear Latched Relays Low Latch Enable High Latch Enable Enable Current Monitor Discrete Inputs Zeroing Sensor Good Zeroing Sensor Failed Calibration of Sensor Good Calibration of Sensor Failed Fail Active Low Active High Active Fail Latched Low Latched High Latched Sensor Fail Active Sensor Missing Active Loop Current Out of Tolerance Calibration Mode Fault Active Zero Mode Active Maintenance Mode Fault Active Input Registers Float Gas Concentration Float Full Scale Value Float Loop Current in ma Int 12 Bit Representation of Current Loop, 4mA is a count of 800, 20mA is a count of 4000 Holding Registers Float Low Alarm Setpoint Float High Alarm Setpoint Sensidyne Document No (Rev B) 41

42 18 SensAir Modbus Specifications (option) Modbus Specifications RTU Transmission Mode Byte-order: most-significant-first Functions 01 (0x01) Read Coils 02 (0x02) Read Discrete Inputs 03 (0x03) Read Holding Registers 04 (0x04) Read Input Registers 05 (0x05) Write Single Coil 06 (0x06) Write Single Register Modbus RS485 Electrical Specifications RS485 2 wire or 4 wire Termination Resisitors 120 Ωohms RS485 Load 2 wire ½ Load 4 wire ¼ Load Comm Port Specifications Baud Rate 9600, 19200, Parity None Start Bit 1 Data Bits 8 Stop Bit 1 Indicators RX LED Indicates received communications TX LED Indicates transmitted communications Cable Recommendations AWG Twisted Pair, Overall Shielded 2 wire Single Pair 4 wire Two Pair Belden 9501, 9502, 8451, 8761, 1419A Alpha Wire 5471C, 5472C 42 Sensidyne Document No (Rev B)

43 19 Wiring Relays (Optional) Wiring Relays 2-4 The optional relay board contains three (3) relays, designated as Fail, Low and High. The Low and High relays are factory set to be Normally Deenergized and Non-Latching (user adjustable). The Fail relay is normally energized and is not user adjustable. Detectors are shipped from the factory with pre-wired relays on the option board. These wires are used for testing the detector relays prior to shipment. Remove these wires before wiring the relay. If your transmitter has an option board installed, wire the relays as described below. Wire Relays Low and High as follows: 1) There are three terminals on each relay terminal block: NC, Com, & NO. Because the relay is normally de-energized wire the relays as in the diagram. 2) Wire the relays as outlined in the diagram. 3) When wiring has been completed, insert the board stack back inside the transmitter housing. 4) Replace /close the transmitter cover. For transmitters with metallic condulet covers, tighten the hex head screw to secure the condulet cover.. Sensidyne Document No (Rev B) 43

44 20 Appendix- Troubleshooting Guide Problem Cause Remedy No Display Unable to attain 4mA output current. Unable to attain output current corresponding to %vol concentration. No power to the detector. Power input and 4-20mA output wires are reversed. Power supply voltage is less than 12Vdc. There is no connection between the power supply and the current output of the detector. Sensor is incorrectly installed. Power supply voltage is greater than 30Vdc. Sensor assembly is defective. Electronics board is defective. Current output of detector is shorted. 4mA is misadjusted. Electronics board is defective. Actual concentration of calibration substance is not the expected concentration. Actual concentration of calibration substance is not the expected concentration. 4mA is misadjusted. Sensor assembly is defective. Electronics board is defective. Apply 12-30Vdc. Verify positive voltage at the power input. Verify power supply voltage to be 12-30Vdc. Verify wiring. Verify wiring. Verify power supply voltage to be 12-30Vdc. Disconnect sensor assembly. Measure the resistance between the colored wires. If resistance is between any pair of wires is <1ohm or >5ohms, replace sensor. Replace electronics board. Verify wiring. Adjust the 4mA level. Replace electronics board. Verify the concentration of the calibration substance. Replace the calibration substance and/or assure proper delivery of the calibration substance to the sensor. Verify that the outside of the sensor assembly is clean. Blow away any debris on the sensor assy with "zero grade" air if necessary. Adjust the 4mA level. Disconnect sensor assembly. Measure the resistance between the colored wires. If resistance is between any pair of wires is <1ohm or >5ohms, replace sensor. Replace electronics board. 44 Sensidyne Document No (Rev B)

45 21 Returned Material Authorization Sensidyne maintains an instrument service facility at the factory to provide its customers with both warranty and non-warranty repair. Sensidyne assumes no liability for service performed by personnel other than authorized Sensidyne authorized personnel. To facilitate the repair process, please contact the Sensidyne Service Department in advance for assistance with a problem which cannot be remedied and/or requires the return of the product to the factory. All returned products require a Returned Material Authorization (RMA) number. Sensidyne Service Department personnel may be reached at: Sensidyne, LP th Circle N, Suite 100 St. Petersburg, FL USA [Service Fax] GasDetectionService@sensidyne.com All non-warranty repair orders will have a minimum fee assessed whether the repair is authorized or not. This fee includes handling, administration and technical expenses for inspecting the instrument and providing an estimate. However, the estimate fee is waived if the repair is authorized. If you wish to set a limit to the authorized repair cost, state a not to exceed figure on your purchase order. Please indicate if a price quotation is required before authorization of the repair cost, understanding that this invackes extra cost and handling delay. Sensidyne s repair policy is to perform all needed repairs to restore the instrument to its full operating condition. Repairs are handled on a first in - first out basis. Your order may be expedited if you authorize an expediting fee. This will place your order next in line behind orders currently in process. Pack the instrument and its accessories (preferably in their original packing) and enclose your return address, purchase order, shipping and billing information, RMA number, a description of the problem encountered with your instrument and any special instructions. All prices are subject to change without notice. If this is the first time you are dealing directly with the factory, you will be asked to prepay or to authorize a COD shipment. Send the instrument, prepaid, to: SENSIDYNE th Circle N, Suite 100 St. Petersburg, FL USA ATTENTION: Service Department RMA #: SERVICE OPTIONS The Sensidyne Service Department offers a variety of service options which will minimize costly interruptions and maintenance costs. These options include initial training, on-site technical assistance, and full factory repairs. Sensidyne has developed several programs which offer options best suited to your applications and needs. For further information, contact the Sensidyne Service Department at the following numbers: [Service Fax]. Sensidyne Document No (Rev B) 45

46 Manufactured by: Sensidyne, LP th Circle N, Suite 100 St. Petersburg, Florida USA [fax] Authorized EU Representative Schauenburg Electronic Technologies GmbH Weseler Str Mülheim-Ruhr Germany +49 (0) (0) [fax] international@schauenburg.com Sensidyne, LP th Circle N, Suite 100 St. Petersburg, Florida USA [fax] web: info@sensidyne.com