Operating Instructions Sensepoint Toxic Sensor
Contents
1. manual a 2 recommended at certified ambient 92mm concerning performance EMC to BS EN50081 parts 1 amp 2 5 1 Changing the electrochemical cell and internal filter nc tencrusciniinsautauvecnavouscnmimaanuesenweaneics 9 5 2 Changing the external hydrophobic assembly 10 for harsh dirty This product is certified for use in hazardous areas and is protected against water and dust ingress to IP65 or IP66 67 if approved weather protection is fitted NOTE M20 thread option awaiting certification Appendix A Specifications c ccscceeeeeeeeeees 11 Appendix B Glossary uu cececeeceeeeeeeeeeeeeeeeeees 12 7 ASSOCIATED DOCUMENTATION Appendix C Main features ccccseescsssersseeees 13 2106M0502 SensePoint Technical Handbook Appendix D Spare parts cccccsssecscssscsssseseeees 14 oe relevant control system manual for connection Sensepoint Toxic Sensor 2 BS EN50082 parts 1 amp 2 and EN 45544 satan caution certification code temperature environments product name as EN50014 1992 range 11 sae notified 12 13 14 body CONTENTS 1 INTRODUCTION amp 2 ASSOCIATED DOCUMENTATION Operating Instructions Honeywell 4 INTRODUCTION c ccesessesssesecscessesssecesseesseeerseerseesseeees 2 1 INTRODUCTION 2 ASSOCIATED DOCUMENTATION ccsccssssssssessesseeee 2 SensePoint is for the detection of toxic gases and is designed for use with an approved junction box 3 SAFETY oo ciceesesnecnsserdetsaceretenncvaneiuetrtcers2. 00ppm 2106B1598 Calibration flow rate recommended between 0 5 and 1 5 l min in solvents for extended periods For further details contact Honeywell Analytics Ltd Ser No year of manufacture SensePoint Toxic 90mm NO 2106B1599 se Gas Sensor mats yee ae a TE Intrinsically safe apparatus in which the circuits themselves Weather PIO CO Ma ciconerete et eeeeeer ya 02000 A 1635 NH CI H SO NO NO O_no less than 12 months are incapable of causing ignition of a flammable gas Weight 185g a a a MA l 205g oxygen ing Standard cccceceeeeeeeeee ees A IP rating Certification label as defined in directive 94 9 EC SOP nus eaueane PARAD I l cs at i A pee aes a EIN I EE CE mark manufacturer s certification number os External Hydrophobic barrier Flow housing for adsorbent gases 02000 A 3120 conrorms to raaemar explosion Certification aa address resthouse a MEH Plastic retainer Junction box standard ccccccecceeeeeee eens 00780 A 0100 E Il 2G EEx dia c T4 s 65 C directives rano iak group amp category AN ensepoin OX Se To reorder a complete new sensor see the label on the product Vmax 32V BAS98ATEX2157X Honeywell Gy Bas98ATEX2157X 2G f z leads or contact EAR Analytics Ltd P UL approved via IEC 79 pending Scie EEx dia llc TA Tamb 55 650 J optional This product complies with the relevant CE standards 0600 stati risk read
3. APPENDIX A SPECIFICATIONS Operating temperature range see table 1 Operating humidity range 20 to 90 RH continuous 10 to 99 RH intermittent non condensing Operating pressure range 90 to 110 k Pa Warm up time APPENDIX B GLOSSARY Exd Flame proof or explosion proof within the confines of European standards EN50014 and EN50018 An enclosure that can withstand the pressure developed during the internal explosion of an explosive mixture and which prevents transmission of the explosion to the explosive atmosphere surrounding the enclosure Exe Increased safety within the confines of European standards EN50014 and EN50019 applied to electrical apparatus that 103mm APPENDIX C MAIN FEATURES 103mm __ Standard Honeywell Analytics junction box APPENDIX D SPARE PARTS Replacement sensing elements including hydrophobic barrier OG 2106B1545 2106B1549 see table 1 does not produce arcs or sparks in normal service in which additional measures are applied so as to give increased v e y at sensor security against the possibility of excessive temperatures 2106B 1594 Exe Exd gland 1000ppm 2106B1595 NH Power consumption PPS 0 9 W a E RAAE L Ca cide a mae in most NH 50ppm 2106B1596 Signal output alkalies petroleum aromatic hydrocarbons alcohols ethers a H _ 1000ppm 2106B1597 4 to 20 mA loop powered esters and most chlorinated hydrocarbons Avoid immersion H 100
4. cell from the pcb Dispose of this in accordance with the local regulations Oxygen For oxygen SensePoint unscrew the old cell connections Remove the new cell from its packaging and remove the shorting link across the base of cell Plug the new cell into the pcb toxic cell Screw in the new cell via the metal tabs oxygen cell Screw the sensor cap assembly back onto the sensor main body Fit the new internal metal gauze assembly Fit the new internal hydrophobic assembly Note The sensor should now be calibrated See Section 4 2 9 4 OPERATIONS First zero the control system with no gas present on the sensor If target gas is suspected to be in the vicinity of SensePoint flow clean air over the sensor using a flow housing see below Fit a flow housing and connect a cylinder of either air for a zero or a known concentration of gas approximately 50 FSD to the flow housing using nylon or PTFE tubing Tubing lengths should be kept to a minimum to avoid extending the speed of response Connect the outlet of the flow housing to a safe exhaust area Pass the gas through the flow housing at a flow rate of approximately 1 Ito 1 51 per minute Allow the sensor to stabilise When gassing with air adjust the control card to indicate zero For span the control card should be adjusted to indicate the concentration of the target gas being applied Remove the flow housing and the gas supply Note for oxygen the
5. e note Product designs and specifications are subject to change without notice The user is responsible for determining the suitability of this product
6. eeservassiienractncieat 3 It employs an electrochemical cell sensor device which is gas specific and used as part of a 4 20mA loop powered 31 WV ARTIS sasnsutastewssntanauaueseesnsenseigecdcamaumbassevenaseenne 3 measuring circuit The sensor includes a voltage clamp g2 Precaution acarieni 3 within a sealed Exd enclosure and an electrochemical cell driver and cell within an IS portion of the sensor A OPERATIONS soraio 4 Different sensor versions detect different gases Sensors 41 Installation 4 are available for the detection of H S CO Cl NH H SO 4 2 Callibration cc sccessssssssessssesessesssssssssessesesseessseessseed RO NO Oy The CoeOh Availabe In M207 Orage NFT AS Fault finding essiri niniin ina a ii 8 thread versions All accept accessories from the specified range Should you require information outside the scope of these instructions please contact Honeywell Analytics Ltd 5 MAINTENANCE ccsccscsssssscsccsscnsccccscceccescceccecensens 9 3 SAFETY 3 1 WARNINGS W This apparatus is not suitable for use in oxygen enriched atmospheres AN te Oxygen deficient atmospheres lt 6 V V may suppress the sensor output Refer to local or national regulations relative to installation at the site The operator should be fully aware of the action to be taken if the gas concentration exceeds an alarm level The ECC electrochemical cell contains a small quantity of acid SensePoint should be protected from mechanical im
7. hould be fitted to a tapped hole within the enclosure and locked in place with a locknut if the parallel thread version is being used Cabling should be multicore two wires plus screen conductor size 2 5mm max Sensors are supplied pre calibrated The apparatus should be installed in a location free from dusts and direct heat sources Installation is to be performed by a qualified installation engineer with the power to the unit disconnected For oxygen versions remove the neoprene stopper and snap the RFI screen and internal hydrophobic assembly supplied separately into place page 10 See the technical handbook for details of installation in forced air conditions 4 OPERATIONS FAULT FINDING Sensor reads non zero all the time Gas could be present ensure that there is no target gas in the atmosphere Background or other volatile organic gases eg solvents can interfere with the operation of the sensor Sensor reads non zero when no gas is present adjust the zero on the control card Sensor reads low when gas is applied adjust the span on the control card z for oxygen versions check that the neoprene plug has been removed from under the plastic retainer Sensor reads high when gas is applied adjust the span on the control card Sensor reads zero when gas is applied check the wiring check the dust protection cap has been removed s check that the sensor is not obstructed g replace the
8. pact Installation should consider not oy the best placing for gas detection related to potential leak points gas characteristics and ventilation but also where the potential of mechanical damage is minimized or avoided 3 2 CAUTIONS E apaau to gas above the design range of the sensor may require the sensor to be re calibrated Do not modify or alter the sensor construction as essential safety requirements may be invalidated Install SensePoint using certified Exe or Exd junction box connectors and glanding Sensors should be disposed of in accordance we local disposal regulations Materials used Sensor Fortron PPS polyphenylene sulphide _ Cell PPO modified polyphenylene oxide 4 OPERATIONS Table 1 Range Recommended Warm Application Operating Temp cp ke Time H S 0 to 50 ppm 20 ppm c otoSpem ppm 0 to 25 VIV _ 19 vi NH Oto 50ppm 25 ppm NH 0 to 1000ppm 500 ppm cl oto 15ppm__ HO ppm O to 1000 ppm 500 ppm 3mins 5 C 40 C H O to 10000 ppm 3000 ppm SO 0 to 15 ppm 20 ppm 0 to 50 ppm 50 ppm 12hrs 5 mins 5 C 40 C NO O to 100 ppm i 5mins ase aoc 3mins 3 mins 5 C 40 C 10 ppm 3mins 5 mins 15 C 40 C 20 ppm__ 3mins 5 mins _ 15 c 40 NO O to 10 ppm 5 ppm 1hr 4 OPERATIONS INSTALLATION The Unit should be fitted to a junction box certified Exd or Exe and fitted with an approved cable gland and connector block The sensors s
9. sensor if failure is suspected z for oxygen versions check that the neoprene plug has been removed from under the plastic retainer Cannot adjust span or zero at control card refer to the technical handbook 4 OPERATIONS Wiring connections are 4 2 SCREEN RED BLUE SENSOR SCREEN SENSOR The unit requires a nominal 18 to 30V 30mA current loop powered supply CALIBRATION SensePoint for toxic gas detection is supplied pre calibrated however for increased accuracy in specific applications on site calibration is recommended Re calibration should only be attempted by qualified service personnel Calibration should only be attempted after the sensor has been installed and powered for a time exceeding the warm up time Table 1 5 MAINTENANCE 5 1 CHANGING ELECTROCHEMICAL CELL AND 5a 5b Ta Tb 10 INTERNAL FILTER Unscrew and remove the grey plastic retainer or accessory if fitted from the sensor Remove the old internal hydrophobic assembly by pushing against the snap fit through one of the retaining slots with a small flat bladed screwdriver The assembly will pop out Do not attempt to lever the assembly out as this may damage the housing Remove the internal metal gauze insert Open the enclosure by unscrewing the sensor cap assembly from the sensor main body ensuring that the electrochemical cell does not rotate with the cap Toxic Gently pull the old electrochemical
10. span gas is normally air at 20 8 V V 11 12 5 2 Oxygen cell O The control card should be adjusted to indicate this when the sensor is in either clean ambient air or in a flow of 20 8 V V O in nitrogen from a cylinder A zero adjustment is not normally required however it is recommended that the alarm levels are tested using a cylinder of a lower concentration of oxygen in nitrogen See Table 1 for details of concentrations and times to be used If the controller cannot be spanned consult the technical handbook For calibration in high flow applications refer to the technical handbook 5 MAINTENANCE Replace the grey plastic retainer or accessory In the event of an apparatus failure return unit to Honeywell Analytics Ltd CHANGING THE EXTERNAL FILTERS Remove the grey plastic retainer or accessory Remove the old external hydrophobic barrier and replace with the new one Replace the grey plastic retainer Main body of sensor Toxic electrochemical cell Sensor cap RFI screen metal gauze Internal hydrophobic assembly External hydrophobic barrier Grey plastic retainer Thank you for reading this data sheet For pricing or for further information please contact us at our UK Office using the details below le UK Office Keison Products P O Box 2124 Chelmsford Essex CM1 3UP England Tel 44 0 1245 600560 Fax 44 0 1245 808399 Email sales keison co uk Pleas
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