Detector for Combustible Gases User Manual
Contents
1. Duct mounting e Mount only in a straight section of duct with minimum air vortex Keep a minimum distance of 1 m 3 5 feet from any curve or obstacle e Mount only in a duct system with a maximum air velocity of 10 m s 2000 ft min or less e Mounting must be performed so that the probe openings are in line with the airflow 3 2 Installation e Open the cover Unplug basic PCB carefully from the bottom part e Fix bottom part by screws vertically to the wall terminal blocks to the ground e Plug in the basic PCB at X4 and X5 with care Replace the cover 4 Electrical Connection Consider static electricity See 3 Mounting e Installation of the electrical wiring should only be performed by a trained specialist according to the connec tion diagram without any power applied to conductors and according to the corresponding regulations e Avoid any influence of external interference by using shielded cables for the signal line but do not connect the Shield e Recommended cable for analog mode J Y St Y 2x2x0 8 LG 20 AWG max loop resistance 73 Q km 20 8 Q 1000 ft e Serial Interface Mode Required cable for RS 485 mode J Y St Y 2x2x0 8 LG 20 AWG max loop resistance 73 Q km 20 8 Q 1000 ft When selecting and installing the cables you have to comply with the regulations concerning the RS 485 bus installation The installations have to be executed in line topology Cable length and type have to be consid ered as well e t is import2. 7 Bus_B ee Transmitter 6 Bus_A 7 Bus B Option 4 20 mA 5 4 20 mA_Inp pi 1 6 Bus A Relay 0 VDC F 4 Analog Out t 2 a 24 VDC 3 24 VDC Out 3 5 14 20 mA Inp R1 4 1 I 5 O VDC 4 4 Analog_Out 2 ANDE 5 N OF 3 24 VDC Out 3 SE Ra ES bee 2 0 VDC 4 Detector 1 24 VDC gs X4 R2 40 X5 Detector Z 00 lt m QA nl gt gt 23 Connection analog d Saa g detector s Two or three wire connection depending on Connection field bus and voltage detector type 17 A Au tomatik prod ukter MA GED User Manual Detector for Combustible Gases Nov 12 Fig 3 PCB ETOS PCB ET23 Option Option Manual Manual Calibration Calibration 7 O 7 a 6 1 6 1 5 2 5 2 4 3 4 3 3 4 3 4 2 5 5 2 5 1 O 1 Anal Output EE V DC OD mA Anal Output MH V DC OD mA Terminal block QO Cop erci Selection analog output signal Fig 4 Jumper 0 20 Jumper V A Output signal 0 20 mA 4 20 mA 18 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 Calibration adapter Fig 5 Type Calibr set AT3300S01 19 A Au tomatikprodukter MI GED User Manual Detector for Combustible Gases Nov 12 10 Part Disposal Since August 2005 there are EC wide directives defined in the EC Directive 2002 96 EC and in national codes con cerning the waste electrical and electronic equipment and also regarding this device For private households there are spec
3. Connect calibration adapter carefully to the sensor element e Apply synthetic air 300 ml min 1 Bar 14 5 psi 10 e Wait one minute until the signal is stable adjust bridge voltage with potentiometer Bridge until the signal is 0 mV 1 mV and stable e Then push button Zero for 5 seconds After successful calibration the measuring signal is corrected automatically Depending on the selected signal starting point the measuring signal shows the following values at test pin Test Signal start at 2 V or 4 mA 40 mV 0 ppm Signal start at 0 V or 0 mA OmV 0ppm If the zero point is out of the admissible range gt 20 mV at starting point 0 gt 60 mV at starting point 20 before calibration there is no correction of the measuring signal The sensor has to be replaced e Remove calibration adapter carefully by turning lightly Check the sensor for correct mounting 5 3 2 Gain e Connect digital voltmeter to pin Test See fig 3 e Connect calibration adapter carefully to the sensor element e Apply calibration test gas 300 ml min 1 Bar 14 5 psi 10 e Wait two minutes until the signal is stable adjust control voltage with potentiometer Gain until the signal corresponds to the calculated value 3 mV see calculation section 5 3 3 e Remove calibration adapter with a careful light turn Check the sensor for correct mounting e By limiting the gain factor calibration will not be possible any more when
4. correctly at Reblug PCB correctl X4 and X5 peg Y Output signal lt 3 mA 1 5 V and or control voltage lt 30 mV calculated value Sensor sensitivity lt 30 Replace sensor element No reaction of the output signal in 7 2 GCD 05_Bus Mode Trouble Case Solution Power voltage not applied Measure tension at X4 i pp Pin 1 and 2 Yellow LED not shining PCB not plugged in correctly at X4 X5 Check wiring Detector not addressed check bus wiring incl topology and termina tion Voltage lt 16 V Set the jumper Remove it after No control voltage at calibration Jumper V A not set J i calibration Replug PCB correctly Yellow LED not flashing No communication at the detector 14 A Au tomatikprodukter MA ID User Manual Detector for Combustible Gases Nov 12 8 Technical Data General sensor performances Gas type Combustible gases vapours See Ordering Information Sensor element Measuring range O 100 LEL Pressure range Storage temperature range Storage time Mounting height Accuracy Long term zero drift Long term sensitivity drift lt 1 5 measuring range year Response time Life expectancy Temperature range 20 C to 50 C 4 F to 122 F Humidity 5 95 RH non condensing Accuracy Repeatability 2 of signal methane D 3 Lo 1 w Dm oa H gt Long term zero drift lt 5 measuring range year Long term sensitivity drift lt 2 measu
5. power supply An impulse pause of more than 10 sec cancels the release of the correction function 5 2 Calibration Depending on the version and the control mode there are three different possibilities to calibrate the detector 6 tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 Manual calibration Manual calibration is only possible if the detector is equipped with the push button Zero and the potentiometer Gain version for manual calibration Manual calibration is possible both in analog mode and in GCD 05_Bus mode In the GCD 05_Bus mode the jumper V A has to be set before manual calibration Only by doing so the control volt age is available at the test pins X6 Remove the jumper after calibration Calibration with the Service Tool GCD 05 In the standard version equipped with the communication connector X12 the detector is delivered for tool and or software calibration In the analog mode the service tool calibration is also possible In the GCD 05_Bus mode calibration is always possible Software calibration via PC with Software GCDO5_EasyConf In the standard version equipped with the communication connector X12 calibration can also be done by means of the configuration and calibration software GCDO5_EasyConf Software calibration is possible for both control modes 5 3 Manual Calibration 5 3 1 Zero point e Connect digital voltmeter to pin Bridge See fig 3 e
6. the detector including cable for damage etc e Remove dust deposits especially at the gas inlet e The filter at the gas inlet has to be replaced if extremely dirty 6 2 Service and Calibration When performing the maintenance you have to do the calibration and the functional test in addition to the inspec tion e Calibration See section 5 e Functional test Check the output signal at the test pins during calibration 6 3 Exchange of Sensor Element Exchange of sensor element is only possible for type pellistor sensor element For type electrochemical the sensor has to be replaced including the electronics The replacement electronics with the new sensor is already factory calibrated Consider static electricity See point 3 Sensor should always be installed without power applied e Unplug basic PCB ETOX carefully from the bottom part e Unplug old sensor from the PCB e Take the new sensor out of the original packing e Plug in the sensor element into the PCB ETOX at XB7 XB8 e Replug the PCB ETOX into terminal blocks X4 X5 carefully e Calibrate according to section 5 13 tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 7 Troubleshooting Trouble Cause solution S O Jumper 0 20 not set Check jumper position Measure tension at X4 Power voltage not applied Two wire Pin 1 and 4 Three wire Pin 1 and 2 only for starting signal 2V 4 mA PCB ATO3 not plugged in
7. the sensitivity of the sensor reaches a residual sensitivity of 30 Then the sensor has to be replaced 7 A Au tomatikprodukter MA ID User Manual Detector for Combustible Gases Nov 12 5 3 3 Calculation of Control Voltage Signal start 2 V 4 mA Control voltage mV 160 mV x test gas concentration LEL 40 mV measuring range LEL Signal start 0 V 0 mA Control voltage mV 200 mV x test gas concentration LEL measuring range LEL Measuring range 100 LEL Test gas concentration 40 LEL methane Control voltage Signal start 2 V 4 mA 104 mV Control voltage Signal start O V 0 mA 80 mV 160 mV x 40 LEL 40 mV 200 mV x 40 LEL 104 mV 80 mV 100 LEL 100 LEL 8 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 5 4 Calibration with GCD 05 Service Tool e Connect digital voltmeter to pin Bridge See fig 3 e Connect calibration adapter carefully to the sensor element e Apply synthetic air 300 ml min 1 Bar 14 5 psi 10 e Wait one minute until the signal is stable adjust bridge voltage with potentiometer Bridge until the signal is 0 mV 1 mV and stable e Connect the GCD 05 Service Tool to the detector open menu Calibration e Enter measuring range and test gas concentration e Wait until the measuring value is stable and then perform automatic zero calibration e Apply calibration test gas
8. 300 ml min 1 Bar 14 5 psi 10 e Wait until the measuring value is stable and then perform automatic gain calibration e Remove calibration adapter carefully by turning lightly Check the sensor for correct mounting e By limiting the gain factor calibration will not be possible any more when the sensitivity of the sensor reaches a residual sensitivity of 30 In this case the sensor has to be replaced Further information can be taken from the user manual of the GCD 05 Service Tool 5 5 Calibration with GCD05_EasyConf e Connect digital voltmeter to pin Bridge See fig 3 e Connect calibration adapter carefully to the sensor element e Apply synthetic air 300 ml min 1 Bar 14 5 psi 10 e Wait one minute until the signal is stable adjust bridge voltage with potentiometer Bridge until the signal is 0 mV 1 mV and stable e Connect the PC via USB RS 485 communication set to the detector open menu Calibration e Enter measuring range and test gas concentration e Wait until the measuring value is stable and then perform automatic zero calibration e Apply calibration gas 300 ml min 1 Bar 14 5 psi 10 e Wait until the measuring value is stable and then perform automatic gain calibration e Remove calibration adapter carefully by turning lightly Check the sensor for correct mounting e By limiting the gain factor calibration will not be possible any more when the sensitivity of the sensor reaches a residual sensi
9. Detector for Combustible Gases User Manual Acetone CH CO Methanol _ CH OH Eula NH _Metyletylketone C H O Benzene GA n Butane CH Ethyl acetate CH COOCH n Heptane CH Ethyl alcohol GHJOH n Hexane CH Ethylene CH _n Octane CA Hydrogen H n Pentane CH Iso propanol CH CHOH Propane LPG CH alcohol la Toluene CH JP8 _ Methane CH Nov 2012 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 TABLE OF CONTENTS 1 Intended Use ico socio a 00 Sede eg TAKET Owe OEE ae oR OSS SEG a ee E 3 2 Functional Description gt sea saksen sekk ea LEE RR Re Re 86 3 2 1 Control Mode lt a aa eo Ge sr Re EE Ger Frk EE EEG ORRE AE ri BE EEG 3 22 SENSO ras vekke A ee A ee eee aS Sele ww mes eee AR e 4 3 Installation 2 5 a ss gas SE ho Bk a Re k kb GE Sk BOO Geek A Re GE Ae 5 3 1 Mounting Instructions arverekken arv 5 3 2 Install tion ex tt ask ur a BAS Feks AEG d h sd ka be 5 4 Electrical Connection s ss sele eds RETTE GSE Eee ee a GE 5 4 1 Wiring Connection lt s a ira vr vr vnr nrk a E EO
10. E E EUR ORUE aR Raa PORDE kran 6 5 COMMISSIONING szo sssaaa a A a RA Se TAGS a LET a a EEE br 6 5 1 Correction of the zero point at the analog output signal oao aoaaa rv rn vnr 6 5 2 Calibra HOR 0 Leed hes ee as es BS aka ee es GRE ea ees ae RR Re aha gg 6 5 3 Manual CalibFatiON gt aci idad a A A a HORDE ER add G r l s Jolo a 4 7 3 1 Zero PO sk sa SAGER HET huge k KST SES SNE A BES Ew e 7 913 2 GM ee Sat bd he bek dad ewe AA AGA de ee 7 5 3 3 Calculation of Control Voltage lt sss ee e mesicni coea de adaa rn EM 8 5 4 Calibration with GCD 05 Service Tool 2vvr rv vr ee 9 5 5 Calibration with GCDO05_EasyConf vr vr verk rann ras 9 5 6 Calculation calibration gas lt gt target gas backup calibrati0n o kr vr 9 5 7 Cross sensitivity data electrochemical sensor element aar kvar rv rn kran an 10 5 8 Cross sensitivity data pellistor sensor element kara an 11 5 9 Addressing only for GCD 05 Bus mode eee ene 12 5 10 Option Relay Outputs aace a eee saa ee SDS eR Be a ee ee ee ee 12 6 Inspection and Service sss seek He eee ESR SERRE a Se we Se 13 GT INSPECHON Los Sad GE ES AE FEE RRA See Se oo EEE hE EE ses s 13 6 3 Exchange of Sensor Element vrir vrak kara eee enes 13 7 Troubleshooting omiso Seas a ee GSA aa 14 7 2 GCD 05 BUS Mode 2 2 ieee KN A ER ee eS eee eS BAS es 14 8 Technical Data s 2 saka saa a ra ee ae A a GR SEG G 15 O EIGU
11. TOS 5 4 o see carb wa de aber reel BO eee a ee Dee Da 17 10 Part Disposals sv sssas aa ta we SUNE STE BOK ars SSE SARAS ee AG 20 11 Notes and General Information 20 11 1 Intended Product Application es 20 11 2 Installers Responsibilities ee 20 11 3 Maintenances ks vas va ek Kaka le ee Ee a aw RG bw RA ee ee a 20 TA Limited Warranty s et es RES Cee eet OS eee eee eee ee 20 2 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 Detector with cathalytic bead sensor for combustible gases and vapours 1 General overview The analog digital gas detector with digital processing of the measuring values and temperature compensation is used for the continuous monitoring of the ambient air to detect the presence of combustible gases and vapours such as natural gas methane propane butane and ammonia etc below the lower explosion limit LEL The detec tor is used for monitoring leakages in gas pipes gas fan heaters gas heating systems gas engines block heating stations gas boilers gas fittings gas transfer stations gas valves natural gas fuelling stations domestic gas boiler installations gas operated vehicles in underground car parks etc The intended sites are all areas being directly connected to the public low voltage supply e g residential commer cial and industrial ranges as well as small ente
12. ant to ensure that the wire shields or any bare wires do not short the mounted PCB 5 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 4 1 Wiring Connection e Open the cover Unplug basic PCB carefully from terminal blocks at X4 and X5 e Insert the cable connect cable leads to terminal blocks See fig 1 and 2 e Replug the PCB in the terminal blocks X4 X5 Replace cover Note A connection of power supply at the output signal X4 pin 4 can destroy the detector 5 Commissioning Consider commissioning instructions at any exchange of sensor elements Only trained technicians should perform the following e Check mounting location e Select output signal form Current or voltage and starting point O or 20 See fig 4 e Check power voltage e Check PCB ET03 00X for proper mounting at X4 and X5 e Check the sensor for proper mounting at the connectors X8 of the PCB ET03 00X only pellistor e Addressing of the detector in the GCD 05 Bus mode e Calibrate the detector if not already factory calibrated Required instruments for commissioning calibration of the detector e Test gas bottle with synthetic air 20 02 80 N e Test gas bottle with test gas methane etc in the range of 30 60 of the measuring range The rest is syn thetic air e Gas pressure regulator with flow meter to control the gas flow to 300 ml min e Calibration adapter with tube silicon free e g Viton Calibr
13. ation set see fig 5 e Digital voltmeter with range 0 10VDC accuracy 1 and a small screwdriver e Calibration tool GCD 05 STL only for calibration with service tool GCD 05 e GCD 05 EasyConf configuration and calibration software incl USB RS 485 communication set only for soft ware calibration mode Note Prior to calibration the sensor element must be fully stabilized by applying power voltage for at least 4 hour without interruption Please observe proper handling procedures for test gas bottles regulations TRGS 220 Attention Combustible calibration gases can be toxic never inhale the gas Symptoms Dizziness headache and nausea Procedure if exposed Take the victim into fresh air at once call a doctor 5 1 Correction of the zero point at the analog output signal The analog output signal is factory set to the zero point If necessary a manual adaptation of the analog signal is possible within 10 sec after having applied the supply voltage e Jumper 0 20 for signal start has to be set 4 mA or 2 V e Connect digital voltmeter 300 mV at test pin Test measuring signal 40 mV 4 0 mA e Switch on the operating voltage e Each pressing on the Zero push button increases the signal by 0 5 mV 0 05 mA Press the button repeat edly until the measuring signal reaches 40 0 2 mV After 44mV the signal starts again at 36 mV The correc tion is only possible within the 10 seconds after having switched on the
14. ca 200 m EMC Directive 2004 108 EWG UL 508A 1 year on material without sensor 30 VAC DC 0 5 A potential free SPDT 30 VAC DC 0 5 A potential free SPNO SPNC 30 mA max 0 8 VA 85 dB distance 300 mm 3 5 kHz 30 mA max 0 8 VA Two lines 16 characters each not illuminated 10 mA max 0 3 VA um ME fansoginpt MN Voltage for external analog detector 24 VAC DC depending on the power supply max load 50 mA 16 tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 9 Figures Application Analog mode Fig 1 Do not connect power supply at this pin OVDC 24 VAC or 0 VAC will destroy the detector 7 Bus B Option Controller 6 Bus A Relay 5 4 20 mA Inp py TH 1 4 20 ma 4 Analog Out 2 24V 3 24 VDC Out 3 0 vt 2 0V 4 1124 VACIDC NE 5 X4 R2 blo X5 Detector Le Do not connecting 24 VAC at Pin 2 and Pin 4 or 24 VDC at Pin 2 and 0 VDC at Pin 4 Short circuit R 10 Ohm burns up 5 100 Analog Ou 4 TD 0 VAC DC 2 24 VACIO gt 1 gt Q X4 Detector Application GCD 05_Bus or ModBUS mode Fig 2 Analog
15. d off with water immediately Out of use sensors must be disposed in the same way as batteries 4 A Auto matik prod ukter MA GED User Manual Detector for Combustible Gases Nov 12 3 Installation Note Avoid any force e g by thumb on the sensor element during operation or installation Electronics can be destroyed by static electricity Therefore do not touch the equipment without a wrist strap connected to ground or without standing on a conductive floor acc to DIN EN100015 3 1 Mounting Instructions When choosing the mounting site please pay attention to the following e The mounting height depends on the gas type to be monitored For gases and vapours with a density gt air the detector must be located near the ground For gases and vapours with a density lt air the detector must be located at the highest point possible Gas density and mounting height can be read from the table Cross sensitivity data e Choose mounting location of the sensor according to the local regulations e Consider the ventilation conditions Do not mount the detector in the centre of the airflow air passages suction holes e Mount the detector at a location with minimum vibration and minimum variation in temperature avoid direct sunlight e Avoid locations where water oil etc may influence proper operation and where mechanical damage might be possible e Provide adequate space around the sensor for maintenance and calibration work
16. e on the sensitivity too The indicated sensitivity data are only standard values referring to new sensor elements 11 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 5 9 Addressing only for GCD 05_Bus mode In the GCD 05_ Bus mode each detector gets its communication address In the standard version with the communication connector X12 addressing is done by means of the GCD 05 Service Tool or by the GCD 05 Configuration and Calibration Software See user manual of the Service Tool or of the Con figuration and Calibration Software In the manual addressing version which can be identified by the address switch being equipped there is a maxi mum of 60 addresses to be selected See fig 3 The jumper is responsible to define the address group and the switch to define the address according to the follow ing table Switch Jumper pos 01 Jumper pos 02 Jumper pos 03 Jumper pos 04 address address address address inactive inactive inactive inactive 5 10 Option Relay Output The two relays are activated in accordance with gas concentration If the gas concentration exceeds the adjusted alarm threshold the corresponding relay switches on If the gas concentration falls below the threshold minus hys teresis the relay switches off again The contact function for relay 2 NC normally closed or NO normally open can be selected via the jumper NO NC See fig 1 and 3 Relay 1
17. e with all national and local codes and OSHA requirements Installation should be implemented only by technicians familiar with proper installa tion techniques and with codes standards and proper safety procedures for control installations and the latest edi tion of the National Electrical Code ANSI NFPA70 It is also essential to follow strictly all instructions as provided in the user manual 11 3 Maintenance It is recommended to check the detector regularly Due to regular maintenance any performance deviations may easily be corrected Re calibration and part replacement in the field may be implemented by a qualified technician and with the appropriate tools Alternatively the easily removable plug in detector card with the sensor may be returned for service to Automatikprodukter 11 4 Limited Warranty AP warrants the detectors for a period of one 1 year from the date of shipment against defects in material or workmanship Should any evidence of defects in material or workmanship occur during the warranty period AP will repair or replace the product at their own discretion without charge This warranty does not apply to units that have been altered had attempted repair or been subject to abuse ac cidental or otherwise The warranty also does not apply to units in which the sensor element has been overexposed or gas poisoned The above warranty is in lieu of all other express warranties obligations or liabilities This warranty ap
18. ial collecting and recycling possibilities For this device isn t registered for the use in private households it mustn t be disposed this way You can send it back to your national sales organisation for disposal If there are any questions concerning disposal please contact your national sales organisation Outside the EC you have to consider the corresponding directives 11 Notes and General Information It is important to read this user manual thoroughly and clearly in order to understand the information and instruc tions The detectors must be used within product specification capabilities The appropriate operating and mainte nance instructions and recommendations must be followed Due to on going product development AP reserves the right to change specifications without notice The informa tion contained herein is based upon data considered to be accurate However no guarantee is expressed or implied regarding the accuracy of this data 11 1 Intended Product Application The detectors are designed and manufactured for control applications and air quality compliance in commercial buildings and manufacturing plants i e detection and automatic exhaust fan control for automotive maintenance facilities enclosed parking garages engine repair shops warehouses with forklifts fire stations tunnels etc 11 2 Installers Responsibilities It is the installer s responsibility to ensure that all detectors are installed in complianc
19. is equipped with a change over contact Via the ModBus interface the two alarm thresholds and the hysteresis are freely adjustable at the PC within the measuring range The procedure can be read from the user manual ModBus Software The following parameters are factory set Alarm threshold 1 Relay 1 10 LEL Alarm threshold 2 Relay 2 20 LEL Switching hysteresis 5 LEL 12 A Au tomatik prod ukter MA GED User Manual Detector for Combustible Gases Nov 12 6 Inspection and Service Inspection service and calibration of the detectors should be done by trained technicians and executed at regular intervals We therefore recommend concluding a service contract with AP or one of their authorized partners According to EN 45544 4 inspection and service has to be executed at regular intervals The maximum intervals have to be determined by the person responsible for the gas warning system according to the legal requirements AP recommends checking the detector every three months and maintaining it every 6 months If different intervals are indicated always consider the shortest interval Inspections and services must be documented The date for the next maintenance has to be affixed to the detector 6 1 Inspection The detector should be controlled regularly by a competent person according to EN 45544 4 The follwing has to be checked in particular e Maintenance calibration interval not exceeded e Visual inspection of
20. plies only to the detector Automatikprodukter shall not be liable for any incidental or consequen tial damages arising out of or related to the use of the detectors 20 A Au tomatikprodukter MA
21. resulting combustion heat also heats up the detector element This heating changes the resistance of the detector element which is proportional to the partial pressure of the combustible gases In addition to the catalytic sensor element the detector also has a similarly heated inactive compensator element Both elements are part of a Wheatstone measuring bridge Environmental influences such as temperature ambient moisture or thermal conductivity of the monitored ambient air affect both elements to the same extent so that the influences on the measuring signal are almost completely compensated The integrated measuring amplifier converts this sensor current into a linear output signal The zero point Zero and the amplification Gain are calibrated by potentiometers or via the comfortable service tool software set See section 5 Caution Certain substances and gases in the monitored ambient air can affect the sensitivity of the detector or poison the sensor completely The following are currently known e Polymerising substances such as ethylene oxide acrylonitrile butadiene styrene silicone e Corrosive substances such as halogenated hydrocarbons e Catalytic poisons such as sulphur and phosphor compounds silicon compounds metal vapours o There is a small quantity of corrosive liquid in the sensor element If in case of damage a person or an area comes in contact with the liquid the affected person or area must wash the liqui
22. ring range month Response time Life expectancy Temperature range Humidity continuous Humidity intermittent NI Power supply Power consumption without options Output signal A AAA Analog output signal 0 4 20 mA load lt 500 0 Selectable Current voltage 0 2 10 V load 2 50 kQ Starting point O 20 proportional overload and short circuit proof Serial interface RS 485 19200 Baud Protocol depending on version AP GCDO05 or ModBus 15 A Au tomatikprod ukter MA GED User Manual Detector for Combustible Gases Physical Enclosure stainless steel Type 5 Enclosure colour Dimensions W x H x D Weight Protection class Mounting Enclosure Plastic Type A Flammability Enclosure colour Dimensions W x H x D Weight Protection class Mounting Cable entry Wire connection Wire distance Approvals Enclosure Type A Warranty Relay output Alarm relay 1 switch threshold 10 LEL Alarm relay 2 switch threshold 20 LEL Power consumption Warning buzzer Acoustic pressure Frequency Power consumption LCD Display LCD Power consumption LED Indicator Stainless steel V2A Natural brushed 113 x 135 x 45 mm Approx 0 5 kg IP 55 Wall mounting pillar mounting Polycarbonate UL 94 V2 Light grey RAL 7032 94 x 130 x 57 mm Approx 0 3 kg IP 65 Wall mounting Standard 1 x M 20 Screw type terminal 0 25 to 2 5 mm 24 to 14 AWG Current signal ca 500 m Voltage signal
23. rprises according to EN50 082 The analog digital detector must not be used in potentially explosive atmospheres The detector must only be em ployed in areas within the environmental conditions as specified in the Technical Data The types ADTO3 and ADT23 only differ in the used sensor types with the corresponding technical data 2 Functional Description 2 1 Control Mode In addition to the analog output the detector is equipped with a serial interface RS 485 for the connection to the GCD 05 system Analog mode The analog output can be selected as current signal with 0 4 20 mA or as voltage signal 0 2 10 V GCD 05 Bus mode The detector can be connected to the GCD 05 system via the RS 485 interface In this mode there is an analog input for the connection of an additional 4 20 mA detector The two measuring values are transmitted via the RS 485 interface to the gas controller The cable topology for the RS 485 bus can be taken from the Guidelines for wiring and commissioning of the GCD 05 hardware The two control modes are available in parallel 3 tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 2 2 Sensor The integrated sensor works according to the catalytic bead principle The ambient air being monitored diffuses through a sintered metal disk into the sensor Here the combustible gases and vapours are burned by catalytic means at a heated detector element pellistor The
24. tivity of 30 In this case the sensor has to be replaced Further information can be taken from the user manual of the GCD 05 Configuration and Calibration Software 5 6 Calculation calibration gas lt gt target gas backup calibration w KAL x Ko 05 UW Target gas LEL KAL Calibration gas LEL K Factor relative sensitivity LEL calibration gas U Factor relative sensitivity LEL target gas Example ADT23 34XX Calibration gas 30 LEL Methane 30 LEL methane x 100 70 42 86 LEL Propane 9 A Au tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 5 7 Cross sensitivity data electrochemical sensor element ane su ee EI teter senere cm as 130 270 vor Fana eon 7 330 ase or msaa gH e 180 am vor isopropyl Alcohol enerom o 220 208 vor Er sg RO e Methanol enon 400 670 im mes Methyl thy Ketone OR so ae as Foor 10 tomatikprodukter MA GED User Manual Detector for Combustible Gases Nov 12 5 8 Cross sensitivity data pellistor sensor element ee meene cm m 20 os ceing KO EE oor tng sopropr Alcohol enerom 220 208 Foor me AA ua ef S Methanol enon em 670 am vor nemne cm s ao 298 or 1 according to information of the sensor manufacturer The table does not claim to be complete Other gases can have an influenc
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