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2106M0525 Iss 2 Nov 05

1

Sensepoint

Gas Detectors

Technical Manual

Содержание Sensepoint

Страница 1: ...2106M0525 Iss 2 Nov 05 1 Sensepoint Gas Detectors Technical Manual ...

Страница 2: ...2106M0525 Iss 2 Nov 05 2 ...

Страница 3: ...recautions to prevent false alarms Never attempt to open a junction box enclosure or replace refit the sensor when flammable toxic gas is present The detector must be earthed for electrical safety and to limit the effects of radio interference An earth point is provided inside the unit Ensure that all screens armor are grounded at a single earth star point at the controller or detector BUT NOT BOT...

Страница 4: ...nel or product or property damage Note Identifies useful additional information Every effort has been made to ensure the accuracy of our documents however Honeywell Analytics can assume no responsibility for any errors or omissions in our documents or their consequences Honeywell Analytics greatly appreciates being informed of any errors or omissions that may be found in the contents of any of our...

Страница 5: ...XCEPT Oxygen 17 Oxygen Detectors ONLY 17 Accessories 19 Fitting an Outer Filter 19 Maintenance 20 Operational Life 21 Sensor Replacement 21 Junction Box Replacement 23 Changing the Outer Filter 26 Fault Finding 27 Parts 28 Sensors 28 Other Parts 29 Accessories 29 Specifications 30 General 30 Detectable Gases 30 Electrical 31 Physical 31 Certification 31 Applicable Standards 31 Environmental 31 Con...

Страница 6: ...Contents 2106M0525 Iss 2 Nov 05 6 ...

Страница 7: ...poison resistant catalytic pellistor sensor device which forms part of a bridge measuring circuit Toxic detector detects toxic gas present in ambient air Detectors measuring gas in parts per million ppm concentrations are available for detecting carbon monoxide CO hydrogen sulfide H2S hydrogen H2 sulfur dioxide SO2 nitrogen dioxide NO2 and ammonia NH3 gas The Toxic and oxygen detectors feature a l...

Страница 8: ...cknut The enclosure features a hinged lid that facilitates installation by a single technician when making electrical connections changing the sensor The terminal block is used to connect sensor power signals to an external controller The three cable entry positions are fitted with approved seals An earth continuity plate with earth terminal is fitted for added RFI protection All the detector type...

Страница 9: ...care when handling sensors as they may contain corrosive solutions Do not tamper or in any way dis assemble the sensor Do not expose to temperatures outside the recommended range Do not expose sensor to organic solvents or flammable liquids At the end of their working life sensors must be disposed of in an environmentally safe manner Disposal should be according to local waste management requireme...

Страница 10: ...lling gas detectors EN50073 1999 Guide for selection installation use and maintenance of apparatus for the detection and measurement of combustible gases or oxygen International codes of practice specifications defining minimum gas detection requirements for specific applications published by regulatory bodies Mount the detector where gas is most likely to be present noting the following points fo...

Страница 11: ...cess plant system and equipment involved safety and engineering personnel Tools The following tools are required for installation Hex Key 4 mm 0 16 in A F for cover fixing screws 7 mm 0 28 in drill for mounting holes Note Fixing screws bolts are not supplied Dimensions The subsequent diagrams show dimensions for Sensepoint Note Diagram not to scale ...

Страница 12: ...follows 1 Drill two mounting holes in the surface The surface should be flat and firm For sizes position etc see the previous dimension drawing 2 Mount the detector using its two mounting lugs Use M6 screws bolts Mount the unit with the gas sensor pointing downwards to ensure that dust water will not collect on the sensor and to stop gas entering the detector Toxic Oxygen 205 0 mm 8 1 76 5 mm 3 0 ...

Страница 13: ...bling may be SWA cable or conduit run Wire size 1 0 to 2 5 mm2 17 to 14 AWG max with suitable M20 explosion proof gland or 1 2 in NPT or 3 4 in NPT steel conduit Use any of the 3 cable conduit entries The following diagrams show how to earth bond Steel Wired Armored SWA cable at enclosures The same principles apply to conduit installations These bonding techniques provide good RFI EMC performance ...

Страница 14: ...ling fitting is placed within 18 in of the enclosure on all conduit runs Cable using any suitable certified cable entry device Use armored multi core cable 2 wire plus screen for toxic oxygen detector 3 wire for flammable detector Cable entry devices must be selected in accordance with the marking on the certification label on the cover of the enclosure Note All unused cable conduit entries must b...

Страница 15: ... NOT BOTH to prevent false alarms due to earth loops All connections are made via the terminal block inside the detector housing 1 Open the enclosure lid Unscrew the four M4 captive securing hex screws using a 4 mm 0 16 in A F hex key wrench The lid is attached to the base by a retaining hinge Lift the lid vertically away from the enclosure base and then tilt it away from the base 2 Terminate the ...

Страница 16: ...re Ensure the cover is securely clamped to the body of the enclosure Use only the captive fixing screws supplied replacement with alternative screws will invalidate certification Fully tighten the four M4 captive securing hex screws 4 Carry out one of the following two procedures Supply red Signal blue Screen braided wire Toxic Oxygen Detector Center Tap white Non Sensitive Element blue Sensitive ...

Страница 17: ...in a clockwise direction If required fit an accessory Refer to the instructions supplied with the item except for fitting outer filters see page 19 Oxygen Detectors ONLY a Remove the sensor cap Unscrew the cap in a counter clockwise direction Refer to the following diagram b Remove the protective disc from inside the sensor cap Discard the disc c Remove the cell s protective plug The plug is stuck...

Страница 18: ...cap Screw the cap in a clockwise direction If required fit an accessory Refer to the instructions supplied with the item except for fitting outer filters see page 19 Power the unit and check for correct operation of the detector Check the gas reading at the controller Refer to the controller s user documentation e Protective Disc x x x x x x x x x x x x x X xxxxxxxx xxxxxX b Sensor Cap Cell Protec...

Страница 19: ...ng outer filters see the following procedure Fitting an Outer Filter This procedure applies to all types of Sensepoint gas detector Refer to the following diagram 1 Remove the sensor cap or accessory Unscrew the cap accessory in a counter clockwise direction 2 Fit the outer filter The filter fits inside the Sensor Cap 3 Refit the sensor cap or accessory Screw the cap accessory firmly in a clockwis...

Страница 20: ... that all screens armor are grounded at a single earth star point at the controller or detector BUT NOT BOTH to prevent false alarms due to earth loops Take care when handling sensors as they may contain corrosive solutions Do not tamper or in any way dis assemble the sensor Do not expose to temperatures outside the recommended range Do not expose sensor to organic solvents or flammable liquids At...

Страница 21: ...rating life subject to the presence of poisons inhibitors is in excess of 3 years The operational life of toxic sensors depends on the application frequency and amount of gas exposure Under normal conditions both the carbon monoxide and hydrogen sulfide sensors have an expected operating life of greater than 24 months The oxygen hydrogen chlorine sulfur dioxide nitrogen dioxide and ammonia sensors...

Страница 22: ...ted power supplies and ensure that they remain OFF during the this procedure 2 Open the enclosure lid Unscrew the four M4 captive securing hex screws using a 4 mm 0 16 in A F hex key wrench The lid is attached to the base by a retaining hinge Lift the lid vertically away from the enclosure base and then tilt it away from the base 3 Disconnect the sensor wiring at the terminal block Record the posi...

Страница 23: ... will break the insulation around the terminal The enclosure is fitted with an earth continuity plate and internal and external earth studs A suitable ring type terminal lug must always be used to secure the earth conductor 9 Close the enclosure lid and secure it Cautions Ensure there is no moisture inside the enclosure before closing the lid Ensure the seal between the body and the cover is corre...

Страница 24: ...er clockwise direction Refer to the warning about sensor handling and disposal at the start of this chapter 6 Put the sensor and M20 locknut to one side for re fitting later 7 Disconnect the controller wiring at the terminal block Record the position of the wiring 8 Remove the controller cable and gland from the box 9 Remove the junction box from its mounting The box is attached by two mounting lu...

Страница 25: ...lways be used to secure the earth conductor Refer to your written record for the position of the wiring or see page 15 16 Refit the controller cable to the new box Fit a new cable gland 17 Reconnect the controller wiring at the terminal block Refer to your written record for the position of the wiring or see page 15 18 Close the lid of the enclosure and secure it Cautions Ensure there is no moistu...

Страница 26: ...ram 1 Remove the sensor cap or accessory Unscrew the cap accessory in a counter clockwise direction 2 Remove the outer filter Discard the old filter 3 Fit the new outer filter 4 Refit the sensor cap or accessory Screw the cap accessory firmly in a clockwise direction Sensor Body 1 4 Sensor Cap New Filter Outer 3 Counter clockwise Clockwise Outer Filter 2 ...

Страница 27: ...nt Reading low when gas applied Adjust the span setting at the controller Controller s user document For oxygen versions check that the protective plug has been removed from the cell and the RFI screen and filter have been fitted See page 17 Reading high when gas applied Adjust the span setting at the controller Controller s user document Reading zero when gas applied Check the sensor Protective D...

Страница 28: ...1SS Toxic Ammonia 0 50 ppm SPSTAXA1SS 0 1 000 ppm SPSTAXA2SS Carbon monoxide 0 200 ppm SPSTAXC1SS 0 500 ppm SPSTAXC2SS Chlorine 0 5 ppm SPSTAXL1SS 0 15 ppm SPSTAXL2SS Hydrogen 0 1 000 ppm SPSTAXG1SS 0 10 000 ppm SPSTAXG2SS Hydrogen sulfide 0 50 ppm SPSTAXH1SS 0 20 ppm SPSTAXH2SS 0 100 ppm SPSTAXH3SS Nitrogen dioxide 0 10 ppm SPSTAXN1SS Sulfur dioxide 0 15 ppm SPSTAXS1SS 0 50 ppm SPSTAXS2SS Oxygen ...

Страница 29: ...els SPSTJB Description For Part No Weather housing includes remote gassing nozzle Flammable Sensor 02000 A 1635 Toxic oxygen Sensor 02000 A 1640 Collecting cone Flammable Sensor 02000 A 1642 Calibration Gas Flow housing Both detector types 02000 A 1645 Right angle mounting bracket for ceiling mount Both detector types 02000 A 0160 ...

Страница 30: ...100 LEL Methane 10 40oC 40oF 50oC 122oF Toxic Ammonia 0 50 ppm 3 20o C 4o F 40o C 104o F 0 1 000 ppm Carbon monoxide 0 200 ppm 20oC 4oF 50oC 122oF 0 500 ppm Hydrogen 0 1 000 ppm 5oC 23oF 40oC 104oF 0 10 000 ppm Hydrogen sulfide 0 50 ppm 25oC 13oF 50oC 122oF 0 20 ppm 0 100 ppm Chlorine 0 5 ppm 5 20o C 4o F 50o C 122o F 0 15 ppm Nitrogen dioxide 0 10 ppm 60 15o C 5o F 40o C 104o F Sulfur dioxide 0 1...

Страница 31: ...PPS Fire retardant Glass Filled Polyester GFP Weight 190 g 185 g 205 g oxygen 600 g Flammable Toxic Oxygen Enclosure Ex II 2 G D EEx d IIC T6 T85 C Tamb 55 C to 55 C BAS98ATEX2156X SIRA03ATEX1116X Performance Ex II 2 G D EEx d ia IIC T4 T135 C Tamb 55 C to 65 C BAS90ATEX2157X Ex II 2 G D EEx e II T6 T85 C Tamb 40 C to 50 C SIRA04ATEX3018 Flammable Toxic EMC Standard EN50270 EN445544 H2S only EN502...

Страница 32: ...ing the details below 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 Please note Product designs and specifications are subject to change without notice The user is responsible for determining the suitability of this product ...

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