SGF 104 Oxygen Sensor

Transcription

1 Installation and user guide Firmware Version 1.0 SGF 104 Oxygen Sensor Oxygen sensor 4-20mA output Senses depletion or Excess O 2 Compatible with Duomo controllers* Architecturally discrete Gas sensor Ceiling or wall mounted Status indication lights Conforms to EN50104 and EN to 24V DC supply Relay output 30V DC IP64 Protective rating Applications The SGF104 has been introduced by Duomo at the request of architects and consultants to provide a more architecturally discrete enclosure without compromising the sensitivity of detection. Other sensors within the SGF100 range sense Natural Gas, Carbon Monoxide, Freon, Hydrogen Sulphide, Hydrogen and LPG. The SGF104 is used to monitor levels of oxygen in locations such as: Research & Teaching Laboratories, Food & Manufacturing, Electronics assembly clean rooms. Where a risk, for example, of Nitrogen (or any inhert gas) leaking may reduce oxygen content within an enclosed environment. Operation The SGF104 senses either a reduction or an increase in levels of of oxygen. It provides a signal proportional to the levels of oxygen to either a Duomo central control from the GS or BX range or directly to Building Management Systems. The SGF104 Oxygen Depletion sensor has a range of 0-25% Oxygen. The system is normally set to give a first stage warning alarm at 19.0% Oxygen, and then a second stage full alarm at 17.0%. This enables action to be taken before an evacuation is required and evacuation before a dangerous situation arises. Excess Oxyen levels can be monitored and an alarm relay activated at 22.5 or 23.5%. Features The self-calibration facility allows the probe to adapt in difficult environments and variable temperatures helping to avoid false alarms. By connecting a datalogging and diagnostic tool (Duomo TS1007) to the sensor It is possible to read back sensor history and other individual sensor specific information, such as: Sensor serial number, Date of manufacture, Number of power ups, Number of alarms, Number of days of anticipated sensor life remaining TS1007 Engineers Tool. i Before connecting the unit careful reading of instruction booklet is recommended, and it is kept in a safe place for future reference. Furthermore, the correct electrical connections according to the enclosed drawings, complying with instructions.

2 Technical Specification Power supply VDC ± 10% Power demand ma in alarm 13,8 VDC Relay switching alarm... 1 A 30VDC SELV Selection of positive safety... Selectable by switch Type of gas detected: Oxygen Integrated sensor according to the type of gas...optical fluorescence Operating range of the sensing element % of O2 Operating range selectable by switch or 18.5% of O2 (depletion), 22.5, 23.5% of O2 (Excess) Note 1 Detector accuracy...+/- 1% FS Long term shift in clean air... < 3% of L.E.L. Auto zero procedure... Included in the software algorithms Response Time... < 10 Functioning humidity % not condensed Functioning temperature C to +60 C Control units usable directly... BX308, BX316 Control units usable with adapter code yy... BX444-Mc, BX449F, GS100M, BX180, BX280, BX150, GS300M Cable diameter for connecting probe - Note mm for 100 mt Section shielded cable transmission distance up to 500 meters...x0,75mm2csa Installation... ceiling or wall mounted Anti-tamper protection... included Enclosure... ABS self-extinguishing VDE0471 External degree of protection... IP64 Overall dimensions...diameter 90 mm Electromagnetic compatibility Reference Norms... EN Note 1. On SGF104 the trigger levels are dependant on the position of the DIP switch 2 selection. They are respectively 19.5% (depletion) and 22,5% (excess) - DIP2 in OFF position - or 18.5% (depletion) and 23,5% (excess) - DIP2 in ON position. Note 2. Connection: The sensor cable must not be installed together with the power cables. If this is unavoidable it is imperative otherwise, make sure to use a shielded cable. Important: The installation of the SGF104, commissioning, service and removal must be carried out by authorized and/or specialized personnel. During installation the sensor enclosure must not be pierced to do so will compromise the protective rating protection. The installation of the detector does not exempt the user from compliance with all regulations concerning the characteristics, installation and use of associated equipment. The ventilation of the spaces and, for example, the removal of combustion products are described in the UNI norms such as ART. 3 LAW 1083 / 71 and relevant legal provisions. Do not allow the sensor to become wet. The probe can be seriously damaged when immersed in water. Remember that the probe has an IP64 protection degree. Handle with care Heavy knocks or falls during transportation or installation can damage the sensor. Avoid abrupt temperature fluctuations. Sudden temperature variations can cause condensation and the probe could work poorly. Temperature compenstation is fitted to this sensor but rapid changes will still affect the functionality. Cleaning Never clean the device with chemical products. Absolutely avoid using any cloth dipped in thinners, alcohol and chemical detergents. The outer enclosure should only be cleaned using a damp cloth. Page 2

3 Assembly of three parts of the SGF s Series sensor Backplate supplied with SGF Series Sensors OPTIONAL Socket connection with cable gland for external mounting on demand Art. ZSGF100 Socket assembly. Place the probe as in the drawing, and rotate in clockwise direction WARNING! Actions to be taken in case of alarm Oxygen O2 is an odorless gas, colorless, slightly heavier than air (specific gravity of 1.1). The air we breathe consists of 20,95% Oxygen. Oxygen is not in itself a flammable gas but being a strong oxidant, it reacts with combustible and reducing materials causing risks of fire and explosion because it enhances the combustion. If the concentration of the O2 in air drops below 19.5%, it is considered deficient for health of people, then if the concentration drops below 16%, it causes breathing problems until to cause the asphyixia and below 6%, it causes the immediate death. Oxygen deficiency can be caused by the increase in the air of other gases (toxic and / or flammable), and also from the leaks of inert gases (nitrogen, helium, argon, etc.). At high concentrations, over 24%, O2 is irritating to the respiratory tract and can cause effects on the central nervous system, eyes and the lungs. In either case, open doors and windows to increase the ventilation. If the alarm continues and the cause can not be identified leave the bulding and, from the outside, to call emergency services. Page 3

4 Sensor Status indication Operating LED Green: Operating Red: Flashing: detecting gas or Steady: alarm threshold exceeded. Yellow: Fault Connections and P.C.B. Layout Switch 1 - Selection of positive safety R - + C NC NO Detection data memory through USB port Switch 2 - Operating range. Gas probe SGF104 S.N. ED567D Year 12/2015 Batch: SGF104/001 Gas : Oxygen Power supply 12/27VDC Absorption 110 ma Relay 1A 30V SELV Signal 4-20 ma USB Connect the sensor to the TS1007 and read the data transmitted. Data connection tool TS007 Connecting the tester TS1007 it is possible to sensor history and print the test report. This report will show the information listed below. Typical print out ADC ( ) probe sgf104 sn 24ad12 date DaY 2190 cy 5 al 15 drift 12 range 20 lel 20% (fault) print tar new save low bat unlock pivot Legend of display Display ADC shows the decimal value of the capsule and the type of GAS Displays the type of sensor, Displays the serial number, Displays the manufacture date, Displays the remaining days at the end of the operating cycle. Displays how many times the probe has been turned on. Displays how many times is gone into alarm Displays how many corrections have been done Displays the operating range if at 20 or at 100% of LEL Displays the percentage of dispersed gas Displays if the probe is in fault Indicates if you want to print the ticket Indicates if you want to reset the probe to the data factory. Asks to save the modified data Indicates when the battery is low Page 4

5 Positioning of the Sensor The positioning of the sensor is an important factor for the correct function of the gas detection control unit. In order to obtain the best results and minimize the probabilities of false alarms, we recommend following this diagram and to keep in mind the following general rules. The probe should be placed at a height of about 1.60 cm from the ground, if the height of the room is higher than 2.8m it is recommended to install it at an average height between ceiling and floor. The sensor should not be fitted where it is likely to be affected by smoke, vapour, etc. as they could distort indicated measurements. The sensor must be placed away from sources of heat, suction fans, ventilation fans. Note! When is mounted on the wall, the orientation is obligatory, See pictures below. Ceiling mounted X Unlock hole Unlock hole Gas Testing Important - Test with calibrated gas only! The general test should be performed by issuing gas from a pre-calibrated bottle within the percentages marked on the bottle information label. Important: This test must be carried out at least once a year or more frequently if required based on a risk assesment of the setting. Test Gas Concentrations for testing the SGF104 Oxygen sensor: DEFICIENCY OXYGEN 18% vol OXYGEN 20,95 vol EXCESS OXYGEN 24% vol Page 5

6 Sensor Output relative to Oxygen content in Air - % vol. ma Deficiency Oxygen alarm Pre-alarm Oxygen Normal level Pre-alarm Excess Oxygen alarm ,5 19,5 20,9 22,5 23, %vol Current-Voltage Conversion Graph with 220 Ohm Load Resistance ma Linear +/-5% 0,88 1,1 2,2 3,3 4,4 VDC Troubleshooting before calling a technician If the device does not start up. Check that the 12/24 Vdc power is present, and that positive and negative polarity has not been inverted. If the Fault LED lights up - If the fault signal reaches the control unit connected to the sensor. Check that the cables are connected according to the drawing, and that the wire isolation sheath has not been pinched. Check the voltage between terminals 1-2. It must be higher than 10,80 Vdc and lesser than 26,4 Vdc. Check the voltage between terminals 2-3. It must be a minimum of 0.8 Vdc to a maximum of 1.1 Vdc. Important Note: These measurement should be performed in clean/fresh air. Moreover, this test must be performed only with the probe connected to a control unit, or with a 220 Ohm resistance installed between terminal 2 and terminal 3. Page Voltmeter 1,1 V. 2 3 R Power supply VDC Linear ouput 4-20 ma

7 Electrical Connections WARNING Before connecting to the power, ensure the voltage is correct. Carefully follow the instructions and the connections according to local regulations. For optimum performance connect using Screened cable earthed at one end. Avoid running sensor cable close to any power cabling. Relay max 1A Power supply 30 VDC SELV detection 4/20 ma R Note! The relay is voltage free. Contact capacity 1A 30VDC resistive. SELV Power supply V. Linear output 4-20 ma UP Positive safety ON J3 J5 Operating range 100% Operating range 20% Positive safety OFF R - + C NC NO Power supply Relay Gas probe SGF100 S.N. ED567D Year 06/2015 Batch: SGF104/001 Gas Oxygen Power supply 12/24VDC Absorption 110 ma Relay 1A 30V SELV Signal 4-20 ma USB data detection When it is mounted on the wall Unlock Pivot DOWN Page 7

8 INSURANCE. This device is insured by the SOCIETÀ REALE MUTUA for the PRODUCT S GENERAL LIABI- LITY up to a maximum of 1,500, EURO against damages caused by the device in case of failures in functioning. WARRANTY. The warranty term is 3 years from manufacturing date, in agreement with the following conditions. The components acknowledged as faulty will be replaced free of charge, excluding the replacement of plastic or aluminium cases, bags, packing, batteries and technical reports. The device must arrive free of shipment charges to DUOMO Ltd Defects caused by unauthorized personnel tampering, incorrect installation and negligence resulting from phenomena outside normal functioning shall be excluded from the warranty. DUOMO Ltd is not liable for possible damage, direct or indirect, to people, animals, or things; from DISPOSAL OF OLD ELECTRICAL & ELECTRONIC EQUIPMENT. This symbol on the product or its packaging to indicates that this product shall not be treated as household waste. Instead, it shall be handed over to the applicable collection point for the recycling of electrical and electronic equipment, such as for example: - sales points, in case you buy a new and similar product - local collection points (waste collection center, local recycling center, etc...). By ensuring this product is disposed of correctly, you will help prevent potential negative consequence for the environment and human health, which could otherwise be caused by inappropriate waste handling of this product. The recycling of materials will help to conserve natural resources. For more detailed information about recycling of this product, please contact your local city office, your household waste disposal service or the shop where you purchased the product. Important Note: In some countries of the European Union, the product is not included in the field of application of the National Law that applies the European Directive 2002/96/EC and therefore these countries have no obligation to carry out a separate collection at the end of life of the product. IP64 Made in Italy In accordance with its continuous development policy, DUOMO (UK) Ltd reserves the right to modify its products and datasheets without notice. Telephone: sales@duomo.co.uk - website 5 The Furlong Berry Hill Industrial Estate Droitwich, Worcestershire. WR9-9AH