Detcon IR-700 SIL 2 Safety Manual - Manual (Page 5)

within +/- 5% LEL of the 50% LEL applied gas level . If response test is not within acceptable limits, then a Full
Calibration procedure must be performed and the Gas Response Proof Test re-performed.
13.1 FULL CALIBRATION
Tools Required:
Zero Gas Cylinder – Zero Air or N2 (may use local ambient air if it’s confirmed to be methane free)
Span Calibration Gas Cylinder - 50% LEL Span Calibration Gas Cylinder (containing 2.50 % volume
methane /balance Air or N2)
Calibration Kit provided by Detcon
Programming magnet
Full Calibration shall be conducted when required. The procedure for performing the Full Calibration is
in the Calibration section of the IR-700 instruction manual. In all cases the model IR-700 gas detector
should be allowed to warm up for 5 minutes before conducting a Full Calibration.
Warning: The 4-20mA output from the IR-700 will drop to 2mA during the Full Calibration
Successful completion of the Gas Response Proof Test must be recorded and documented in the SIS
logbook. If the Full Calibration is performed, it should also be documented in the SIS logbook.
14 OUTPUT RESPONSE PROOF TEST
Tools Required:
Span Calibration Gas Cylinder - 50% LEL Span Calibration Gas Cylinder (containing 2.50 % volume
methane /balance Air or N2)
Calibration Kit provided by Detcon
The Output Proof Test is performed as follows:
1. Inhibit alarm response at the control device.
2. Apply test gas (50% LEL methane/Air or N2 ) to the detector. Verify correct 4-20mA output signal at the control
device.
3. Re-activate alarm response at the control device.
15 FAULT/FAILURE ACTION PLAN
In the event that a Full Calibration does not result in acceptable Gas Response Proof test, then the standard Maintenance,
Troubleshooting, and Device Repair and Return Procedures are listed in the IR-700 instruction manual must be followed.
Any failure to successfully complete the Gas Response Proof Test must be recorded and documented in the SIS logbook.