Routine Maintenance - Crowcon Xgard IR Instructions D'installation, D'utilisation Et D'entretien

Xgard IR
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160
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× 3   + 40
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9. If the control equipment display requires adjustment consult the operating manual for
the equipment.
10. Remove the gas and allow the sensor to completely settle before re-checking the
zero setting.
11. Close the junction box of the detector ensuring that the lid is securely tightened, and
the grub-screw is secured.
12. The detector is now operational.
Note: ATEX Certified Xgard IR detectors will be supplied calibrated for compliance with
EN61779 (where, for example, 100% LEL Methane = 4.4% volume). UL\CSA certified
detectors will be supplied calibrated for compliance with ISO10156 (where 100% LEL
Methane = 5% volume).

3.2 Routine maintenance

Site practices will dictate the frequency with which detectors are tested. Crowcon would
recommend that detectors be gas tested at least every 6 months and re-calibrated as
necessary. To re-calibrate a detector follow the steps given in 3.1.
The sinter should be inspected regularly, and replaced if it has become contaminated. A
blocked sinter may prevent gas from reaching the sensor.
When performing maintenance on Xgard IR, ensure that the sensor retainer and junc-
tion box lid O-rings are present and in good condition to maintain the ingress protection
of the product. See the 'Spare parts and accessories' section for the part numbers of
replacement O-rings.
The sensor used in Xgard IR should provide in excess of 5 years trouble-free operation.
In the event of a sensor failure, the sensor module should be replaced.
3.3 Changing Gas Types.
Each Xgard IR detector is supplied pre-calibrated for a particular type of gas (for
example methane, propane or CO
the Xgard IR detector should be returned to Crowcon for modification. Please contact
Crowcon for further details.
= 136 mV
). If re-calibration for a different gas type is required,
2
3. Operation
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