Ampcontrol Pty Ltd
– ABN 28 000 915 542
GASGUARD CH4 GAS SENSOR USER MANUAL
GSB076 Version 6
– March/2019
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 15 of 25
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5
COMMISSIONING AND CALIBRATION
Commissioning is the process of carrying out initial checks, adjustments and calibration prior to placing
the system into operation for the first time.
Sensor calibration, although forming part of the commissioning process, is also performed periodically
throughout its operational life. Calibration is also required immediately following any repair to the sensor.
During commissioning and subsequent recalibration, it is important to ensure that appropriate steps are
taken to prevent the sensor output signal from initiating a fault, warn or alarm condition, or
inappropriately driving an equipment control function. Consult the relevant equipment user manuals for
specific details on how to isolate alarms and functions.
The sensor, as supplied has been factory calibrated to traceable standards. However, before putting the
sensors into operation, it is important to verify this calibration. This is especially important if the
instruments are commissioned sometime after delivery.
5.1 Preliminary Checks
Perform the following preliminary checks:
Verify that electrical connections are correct and that they comply with the appropriate standards.
Apply power to the sensor.
Check the voltage applied to the Amplifier electronics is between 12VDC and the maximum
permitted under the conditions of certification.
Verify that the sensor is displaying a gas reading and has not entered a fault condition. The
reading may not sit at zero initially since the sensor needs to stabilise from the point of applying
power.
5.2 Gasguard Display Panel
The Gasguard display provides a number of indications relating to its operational status. The table below
lists these along with their meaning.
Table 2: Gasguard Sensor Display Status Codes
Display
Description
-777
There is no sensor plugged into the amplifier or supply voltage low
-888
Sensor is faulty/expired
-999
Amplifier needs reconfiguration
Er
Error has occurred
CAL
Calibration mode initiated (display blinks when in calibration mode)
SAU
Calibration settings have been saved
PU
Powering Up
