HLM-2000-EX Flammable Gas Transmitter User Manual
Contents
1. 2000 Flammable Gas Transmitter User Manual Technical Support Continental North America Toll Free 1 800 387 9487 Ph 1 905 829 2418 Fx 1 905 829 4701 ARJAY A Product of Arjay Engineering Ltd Oakville Ontario Canada www ArjayEng com www EnmetGasDetection com Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 1 TABLE OF CONTENTS Section Title Page TABLE OF 1 2 WARRANTY 2 2 1 LIABILITY Yu ua 2 2 2 PRODUCT RETURN 2 2 3 MODIFICATIONS AND 68 22 2 3 PRODUCT INFORMATION enne 3 3 1 TRANSMITTER iiit iter d o nd URS aue 3 3 2 FACTORY SETTINGS 3 3 3 CONTAMINANTS amp INTERFERANTS I 3 3 3 1 CONTANMINANTSu ul ul L L Susa 3 3 3 2 uuu ua nn 4 3 4 OPTIONAL ACCESSORIES uuu t e i RE Rd 4 4 PRODUCT DESCRIPTION 2 5 4 1 GENERAL 5 4 1 1 SENSOR TRANSMITTER SPECIFICATIONS 5 5 INS TALLA TION 6 5 1 Kee wie 6 5 2 MOUNTING EE 6 5 3 CABLE SELECTION AND 2 7 5 3 1 FIGURE Cable selection2. Calibration verification set up procedure SENSOR CALIBRATION ADAPTER REGULATOR PLACE CALIBRATION ADAPTER INTO SENSOR ELEMENT AND OPEN REGULATOR VALVE FULLY ADJUST AFTER STABILIZATION OF mA SIGNAL FIGURE Calibration procedure 11 Model HLM 2000 EX HLM 2000 EX UM01 doc 1 0 7 PREVENTIVE MAINTENANCE 7 1 GENERAL The enclosure should be brushed or wiped clean once a year or more depending on the accumulation rate of dust or dirt To avoid sensor damage the unit MUST NOT be submerged in any liquids Hosing or splashing the unit with any liquids must also be avoided 7 2 TROUBLESHOOTING GUIDE Symptom Possible Cause Test Action Corrective Action No Current Power Supply Measure TRX supply voltage Isolate Power supply Problem Output From TRX Problem Should be between 12 26 VDC Blown Multimeter Fuse Test meter fuse Replace meter fuse Excessively low zero setting common if changing sensor Attempt zero adjustment Reset zero readjust span also Failed sensor Bad connection at sensor or damaged sensor Perform sensor tests as below Steady 1 mA Output from TRX Bad sensor connection Measure sensor signal voltage on TRX sensor Terminal Block Voltage should be 2 VDC between and and Approx 1 VDC between and 1 Ensure good connection between sensor terminal block and sensor Damaged sensor Disconnect power remove sens
3. Arjay is not liable for auxiliary interfaced equipment nor for consequential damage This warranty shall not apply to any product which has been modified in any way which has been repaired by any other party other than a qualified technician or authorized Arjay representative or when failure is due to misuse or conditions of use 21 LIABILITY All ARJAY products must be installed and maintained according to instructions Only qualified personnel should install and maintain the equipment ARJAY shall have no liability arising from auxiliary interfaced equipment for consequential damage or the installation and operation of this equipment ARJAY shall have no liability for labor or freight costs or any other costs or charges in excess of the amount of the invoice for the products THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED AND SPECIFICALLY THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE DESCRIPTION ON THE FACE THEREOF WARNING CHECK TO ASSURE THE WORKING AREA IS FREE FROM HAZARDS DURING INSTALLATION OR WHEN PERFORMING MAINTENANCE AND USE PROPER PRECAUTIONS 2 2 PRODUCT RETURN All products returned for warranty or service should be shipped by prepaid freight and will be accepted only with an R M A number issued by ARJAY All products returned to the client will be shipped by freight collect 2 3 MODIFICATIONS AND SUBSTITUTIONS
4. Due to an ongoing development program ARJAY reserves the right to substitute components and change specifications at any time without incurring any obligations Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 3 PRODUCT INFORMATION 3 1 TRANSMITTER Sensor transmitter Unit Order Number Transmitter Part Number WARRANTY Transmitter Serial Sensor Part Number Sensor Serial Number Power Supply Current Consumption 3 2 FACTORY SETTINGS Gas Type ii ERR EXER ER e RETE Range 4 20 mA Target Gas Ratio to Methane 4 2 3 5 CONTAMINANTS amp INTERFERANTS 3 3 1 CONTAMINANTS 12 to 26 VDC 300 mA max 20 LEL CH4 LEL The performance of Arjay Engineering Ltd catalytic combustion type gas sensors may be affected by exposure to substances known as poisons and inhibitors Inhibitors are present in volatile substances containing halogens or sulphur compounds Sensors may recover their sensitivity characteristics after exposure to inhibitors has ceased Some substances produce a permanent poisoning eff
5. 565 Quality Management Systems Syst me de Qualit www ca sgs com ARJAY ENGINEERING LTD GUARANTEE We hereby guarantee this instrument to be free from defects in workmanship and materials and if found defective in workmanship or materials upon being returned to our factory prepaid within one year from date of purchase it will be repaired or replaced at factory without charge However if upon being returned and after inspection there is evidence that the instrument has been subjected to tampering careless handling improper or faulty application or installation the above guarantee shall not be applicable and we shall have the right in any such case to make a charge to cover the cost of repairs servicing and transportation expense The undersigned assumes and shall have no liability for consequential damages resulting from the use or misuse of the instrument The foregoing guarantee is in lieu of all other guarantees or warranties expressed or implied and all other obligations or liabilities contractual or otherwise either to the original purchaser of said instrument or to any other person whomever BY ARJAY ENGINEERING LTD For service call ARJAY Engineering Ltd directly Canada 905 829 2418 North American Toll Free 1 800 387 9487 Fax 905 829 4701 Internet www arjayeng com E mail arjay arjayeng com Telephone 1 905 829 2418 ARJAY ENGINEERING LTD ISO 9001 2008 N Telefax 1
6. or lower than normal signal may be noticed In many facilities there can be residual levels of the gas being detected in the air at all times These can cause a minor response from the sensor expressed as a rise in signal Other causes for minor signal variations include extremes in temperature The application of a clean air sample will verify if the elevated signal is from background gas or equipment error 6 2 CALIBRATION Verification of calibration should be done at least once every 6 months for safety reasons Monthly verification is recommended for highly demanding applications Calibration is necessary after replacing the sensor The new sensor requires an initial burn in time of 24 hours Factory or on site calibration services customer training and calibration kits are available Specify the sensor transmitter Part Number and Serial Number noted in section 3 1 TRANSMITTER and Gas Type noted in section 3 2 FACTORY SETTINGS to order any of the above Note Turn off power supply before removing or replacing the transmitter or sensor Caution Only qualified personnel should perform the calibration 6 2 24 EQUIPMENT REQUIRED e digital multimeter with a minimum display range of 20 0 mA e remote calibration lead provided with the transmitter e miniature screwdriver e calibration kit zero amp span gases regulator hose amp adapter cup e contact factory for information on cal kits Model HLM 2000 EX HLM 2000 EX U
7. 2 to 5 years depending on environmental conditions The sensor should be replaced under the following conditions 1 If the sensor element becomes an open circuit the transmitter outputs a fixed 1 mA signal that cannot be readjusted 2 When the sensor no longer responds to the presence of gas or produces an unstable zero signal 3 Arecommended minimum of 3 mV sensor responses to 2096 LEL of Methane is required for stable reliable operation Measure the sensor swing as per section 6 3 1 When the sensor needs replacing reorder the Sensor Part Number listed in the Product Information on page 3 Refer to Figure 7 3 1 for the sensor replacement and wiring procedure Perform initial approximate calibration after a minimum of 15 minutes of sensor being powered Note Allow 24 hours for the new sensor element to stabilize burn in before final calibration Refer to calibration section 6 3 of this manual 7 3 1 FIGURE Sensor replacement and wiring procedure FROM MONITOR STEP 1 POWER DOWN STEP 2 2 III i TRANSMITTER TERMINAL BLOCK E S STEP 3 ve r S UNTHREAD SENSOR w IN ASSEMBLY FROM D l SENSOR TRANSMITTER HOUSING Y r STEP 4 THREAD NEW SENSOR ASSEMBLY ONTO SENSOR TRANSMITTER HOUSING BLACK YELLOW RED STEP 5 CONNECT SENSOR LEADS WIRING TO SENSOR TERMINAL BLOCK ON TRANSMITTER DETAIL RESTORE POWER STEP 6 PERFORM INITIAL CALIBRATION AFTER 15 MINUTES AND FINAL RE
8. 7 5 3 2 FIGURE Wiring layOoUt rre ee re ena 8 6 OPERATION AND 0 7 00 0 000 000000000000 nnn nnns 9 6 1 OPERATION nnm nmn Re tre eR x RR earn ches 9 6 2 CALIBRATION uuu l ee dus 9 6 2 21 EQUIPMENT 0 9 6 3 1 CALIBRATION 10 6 3 1 MEASURING SENSOR 22 10 7 PREVENTIVE MAINTENANCE 12 7 1 GENERAL unu tu een pen SS LI MD ELE 12 7 2 TROUBLESHOOTING 12 7 3 SENSOR REPLACEMENT 13 7 3 1 FIGURE Sensor replacement wiring procedure 13 Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 2 WARRANTY This Arjay Engineering Ltd equipment is warranted against defects in material and workmanship from the date of shipment from factory Please check equipment specifications following this page for particular warranty periods Maintenance items are not warranted During the warranty period The Arjay Engineering Ltd will repair or replace components that prove to be defective in the opinion of Arjay Any equipment deemed to be defective by the user should be returned to The Arjay Engineering Ltd for evaluation see product return below Site visits by Arjay Engineering Ltd personnel to evaluate repair equipment are not covered by this warranty
9. 905 829 4701 2851 Brighton Rd 4 Quality America Toll 800 387 9487 N www ca sgs com Internet www arjayEng com Oakville Ontario Canada L6H 6C9 565 E Huil prjaytmariayEng com
10. CALIBRATION FINE TUNING AFTER 24 HOURS 13 Ju uoduuoo I eese pue piel LLL L o gt X3 0002 WTH 80 90 60 suu a 55 men umop Bunurod sosues S eM y 9 oN ONBISSNION3 AV PUY 5959014 22 45 punoJD 104340 0487 1044909 uods poa uonoaqno Seuinbay 404 192 AOLINOW 19 131 LOANNOD MOLINGNOD v Sv 1351 38 LON LSAW 113 5 31893 CAINOA AO 99668 on 31899 THS 9I 19 WHO 062 XVW 92 21 SOLINOW ANddNS JJLLINWSNYJL ov 18 2 SANH 1 0331 7 6 3015 D E A3I IND23 SO SN3S YALLIWSNVaL H H H H H H H H MAINTENANCE AND CALIBRATION Your ARJAY ENMET gas detector is the state of the art in gas detection but like any other part of your ventilation system it requires periodic maintenance and calibration There are various sensor technologies that may be used in your Arjay gas monitor including solid state MOS Electrochemical Infrared and Pellister Pair Hot wire These have a normal operating life of 3 to 5 years under ambient conditions You should consider a preventive maintenance schedule whereby you test your system on a periodic basis to ensure its proper calibration and operation For solid state MOS sensors we recommend calibration every 3 to 4 months for a typical garage app
11. M01 doc 1 0 6 3 1 CALIBRATION PROCEDURE The remote calibration lead is required to measure the transmitter output signal The insertion of the calibration lead plug into an HLM 2000 EX 3 wire model transmitter cal jack will disable the transmitter output signal This will result in a FAIL ALARM condition at the monitor during the calibration verification procedure Zero and Span adjustment terminals are provided to set the zero and span while the sensor is exposed to known concentration sample gas mixtures It is always best to calibrate the transmitter with the intended gas to be detected When this is not possible nor practical theoretical cross sensitivity calibration may need to be used 1 Remove cover from transmitter housing 2 Connect remote calibration lead to multimeter BLACK lead to negative or common RED lead to positive mA scale 3 Switch ON multimeter and select the DC milliamp range of 20 mA or greater scale 4 Insert plug end of remote calibration lead fully into CAL jack on transmitter cover plate This will block the outgoing signal and probably causing a fail at the monitor 5 Apply a Zero gas sample or fill a garbage bag with clean outdoor air and apply to sensor Check for a stabilized ZERO signal of 4 0 mA Set ZERO trimmer to 4 0mA 6 Apply a Span gas sample Since the transmitter output range is 4 to 20 mA a full scale concentration should register 20 mA after a few moments exposure
12. Proportionately a half scale concentration of gas should register 12 mA and so on For non Methane target gas see the specifications in section 3 2 FACTORY SETTINGS for the Methane ratio Methane at 20 LEL can be cross ratioed for most target combustible gases Apply the span gas and adjust the SPAN trimmer to the appropriate mA output It is good instrumentation practice to verify the zero reading after performing any span adjustments Perform the span procedure after all zero adjustments 6 3 1 MEASURING SENSOR SWING For ongoing monitoring of sensor condition you can check the sensor swing during calibration Sensor power supply is 2 0V between sensor terminals and Signal swing is measured between and 1 terminals Compare the clean air environment Voltage and the cal gas environment Voltage A new sensor will have approximately 0 75 mV swings per LEL CH4 Minimum swing should be 3 mV with 20 LEL CH4 For 50 LEL CH4 minimum swing would be 7 5mV Sensor swing data should be logged for performance evaluation and sensor replacement purposes 10 Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 FROM MONITOR DIGITAL MULTIMETER CURRENT MODE j 9 ZERO II bs INSERT PLUG ADJUST 9 192 INTO CAL JACK 2 rape 2 SPAN ADJUST ZA PK TRANSMITTER SENSOR bt SWING 7 SENSOR POWER LOCATION 20 0 4 V DC REMOTE CALIBRATION ENSOR SENS LEAD FIGURE CALIBRATION GAS CYLINDER
13. ble distance between the transmitter and monitor is dependant on wire gauge as shown in the following Cable Selection Chart 5 3 1 FIGURE Cable selection chart 5000 1524 4500 1371 4000 1219 3500 1067 3000 914 2500 762 2000 609 CABLE LENGTH in FEET meters SAFE REGIONS 1500 457 1000 304 500 152 c _ _ _ i i 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 POWER SUPPLY VOLTAGE volts Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 5 3 2 FIGURE Wiring layout MONITOR MAX 250 INTERNAL 12 26 DC 3 WIRE SHIELDED CABLE T EN CABLE SHIELD MUST N USED AS CONDUCTOR EM CONNECT SHIELD AT MONITOR X x Bl TRANSMITTER Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 6 OPERATION AND CALIBRATION 6 1 OPERATION The ARJAY HLM 2000 EX series sensor transmitter is factory calibrated for the gas listed in Factory Calibration at the beginning of this manual The sensor transmitter should not need re calibration when first installed and powered up but a test for correct operation is suggested All testing should be done after the recommended stabilization period of 24 hours Following stabilization the transmitter should be sending in a clean air environment a 4 mA signal to the monitor or controller However there are a few situations where a slightly higher
14. ect on the catalyst These poisons include silicone oils greases and petroleum additives such as tetraethyl lead and phosphate esters Always be cautious of by products that may evolve from the thermal decomposition of materials such as plastics Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 3 3 2 INTERFERANTS Partial list of other gases that detector will respond to Acetaldehyde n Decane Methylcyclohexane Acetic Acid Diethylamine Methylethylether Acetic Anhydride Dimethylamine Methylethylketone Acetone 2 3 Dimethylpentane Methyl Formate Acetylene 2 2 Dimethylpropane Methyl Mercaptan Alkyl Alcohol Dimethylsulphide Methylpropionate Ammonia 1 4 Dioxane Methyl n propylketone n Amyl Alcohol Ethane Napthalene Aniline Ethyl Acetate Nitromethane Benzene Ethyl Alcohol n Nonane Biphenyl Ethylamine n Octane 1 3 Butadiene Ethyl Benzene n Pentane n Butane Ethylcyclopentane iso Pentane iso Butane Ethylene Propane Butene 1 Ethylene Oxide Alcohol cis Butene 2 Dimethyl Ether n Propylamine trans Butene 2 Diethyl Ether Propylene n Butyl Alcohol Ethyl Formate Propylene Oxide iso Butyl Alcohol Ethylmercaptan iso Propylether tert Butyl Alcohol n Heptane Propyne n Butyl Benzene n Hexane Toluene iso Butyl Benzene Hydrazine Triethylamine n Butyric Acid Hydrogen Cyanide Trimethylamine Carbon Disulphide Hydrogen Vinylethylether Carbon Monoxide Hyd
15. imum CERTIFICATION CSA C 22 2 152 M1984 SENSOR TYPE Catalytic pellistor RESPONSE TIME 50 lt 10 secs 90 lt 30 secs ZERO DRIFT Less than 3 full scale per month SENSOR LIFE 2 to 5 years in clean air Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 5 INSTALLATION 5 1 LOCATION To select a suitable instrument and effective location to properly safeguard any particular area the user must have a basic knowledge of gas vapor properties and phenomena as to how gases and vapors propagate and whether the gases are heavier or lighter than air The user must also be aware of the conditions which may prevail in the areas being protected such as the direction and velocity of gas movement humidity and temperature variation presence of particulates or detrimental contaminants and ease of gaining access for periodic instrument maintenance and adjustment The following points will aid the user in selecting a solid non vibrating mounting surface subject to the general location dictated by industry standards and the regulatory authorities 1 Density of gases to be monitored Lighter than air vapors gases tend to rise and heavier than air vapors gases tend to settle 2 Air movement Air velocity and direction influence the dispersion of vapors gases to be monitored 3 Potential sources The location and nature of the potential vapor gas sources such as pressure amount source temperature and distance need to be as
16. lication For Electrochemical sensors we recommend calibration every 6 months for a typical garage application Pellister Pair we recommend every 3 to 4 months and Infrared we recommend every 6 months For applications that are more sensitive or where internal policies exist a higher frequency of calibration may be required This is a simple procedure which will indicate any problems with your system A test and calibration kit may be purchased from ARJAY ENGINEERING for this purpose Parts are also readily available from our facility MAINTENANCE CONTRACT Alternatively you may wish to consider a Maintenance Contract with ARJAY ENGINEERING whereby one of our service technicians comes to your site and checks out the unit for proper calibration and operation on a regularly scheduled basis This is done on a flat per annum fee parts are extra Typical target gases are included however exotic or specialty gases may have a surcharge If you wish us to quote a Maintenance Contract fill in the section below and return to our office COMPANY ADDRESS CONTACT PERSON PHONE FAX EMAIL MODEL AND SERIAL NO OF GAS DETECTOR Fax to address below or e mail to arjay 9 arjayeng com Telephone 1 905 829 2418 ARJAY ENGINEERING LTD Telefax 1 905 829 4701 2851 Brighton America Toll 800 387 9487 arjayEng Oakville Ontario Canada L6H 6C9 4
17. or and measure sensor voltage Voltage should be 2 VDC between and and Approx 1 VDC between and 1 If sensor is open on any combination of wires call factory for replacement sensor Not enough sensor response with Cal gas cannot adjust or correct span Expired or weak sensor Measure sensor signal on TRX sensor terminal block from S and A typical sensor has a net signal change of 1 mV for every percent LEL when new Minimum Contact factory for replacement sensor output recommended swing is 3 mV with 20 LEL Not enough Expired or weak Measure sensor signal on TRX Contact factory for replacement sensorresponse sensor sensor terminal block from S sensor with Cal gas and A typical sensor has a net cannot adjust or correct span output signal change of 1 mV for every percent LEL when new Minimum recommended swing is 3 mV with 20 LEL Upscale zero reading Background gas Apply zero gas or ensure a clean air environment Adjust zero if clean air does not lower signal Recheck span if zero is adjusted Short sensor life Poisoned sensor Calibrate sensor If sensor life is shorter than expected a poison resistant sensor may be more suitable for the application Contact an ARJAY application consultant at the factory 12 Model HLM 2000 EX HLM 2000 EX UMO01 doc Rev 1 0 7 3 SENSOR REPLACEMENT Sensor life is typically
18. rogen Sulphide o Xylene Carbon Oxysulphide Methane x Xylene Cyanogen Methyl Acetate p Xylene Cyclohexane Methyl Alcohol Cyclopropane Methylamine 3 4 OPTIONAL ACCESSORIES The following options are available for your HLM 2000 EX Series Transmitter HLM 2000 EX 6000 08 Duct Adapter HLM 2000 EX 6000 06 Splash Guard HLM 2000 EX 6000 01 Flow Through Adapt HLM 2000 EX 4309 Charcoal Filter Poison resistant sensor Note The use of optional accessories may affect the response time Note Arjay Engineering Ltd Monitoring systems must be installed and maintained according to instructions to ensure proper operation Only qualified personnel should install and maintain the equipment Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 4 PRODUCT DESCRIPTION 4 1 GENERAL DESCRIPTION The ARJAY HLM 2000 EX series sensor transmitter is designed to provide continuous reliable surveillance of surrounding air for combustible gases listed in Product Information page 3 This unit provides a 4 to 20 mA variable current signal which is proportional to the gas concentration detected Each sensor transmitter is factory calibrated and ready for field installation and operation 4 1 1 SENSOR TRANSMITTER SPECIFICATIONS OPERATING TEMPERATURE 40 to 40 40 to 104 F OPERATING PRESSURE Ambient atmospheric pressure HUMIDITY 0 to 99 RH non condensing SIGNAL OUTPUT 4 to 20 mA into 250 Ohms max
19. sessed 4 Ambient temperature Avoid installation in environments likely to promote condensation 5 Accessibility Future maintenance and calibration requirements should be considered when selecting detector locations 6 Structural arrangements Structural arrangements such as walls troughs or partitions could allow vapor gas to accumulate 7 Mechanical damage and contamination Detectors should be installed in locations to preclude mechanical damage from cranes traffic exhausts and washdowns from normal operations 5 2 MOUNTING The sensor housing SHOULD NOT touch the mounting surface Do not install the sensor facing up Please refer to the mounting installation diagram at the end of this manual Note Refer to the electrical code for mounting regulations The mounting arrangement of the transmitter housing dependant on the transmitter location and mounting surface must comply with local electrical regulations and codes Model HLM 2000 EX HLM 2000 EX UM01 doc Rev 1 0 5 3 CABLE SELECTION AND WIRING The transmitter output S terminal block connects to the S connections on a channel terminal block of the monitor one transmitter per channel as shown in Figure 5 3 2 Connection should be made using 3 conductor shielded cable shield is to be grounded at the monitor and not grounded at the transmitter housing Run cable through steel conduit for best signal transmission The maximum permissi
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