Ampcontrol Pty Ltd
– ABN 28 000 915 542
GG2 DISPLAY USER MANUAL
GG2B023 Version 3
– JUNE/19
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
Page 27 of 82
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5
COMMISSIONING AND CALIBRATION
Commissioning is the performance of initial checks, adjustments and calibration prior to placing the
system in operation for the first time. Calibration however, is not limited to performance of
commissioning. Calibration is also performed throughout the life of the system on a periodic basis and
after major repairs to the system.
During commissioning and subsequent re-calibration, it is vital to ensure that procedures are followed to
prevent any abnormal sensor signal from initiating any fault, warning or alarm status indicator, or
equipment control function on auxiliary equipment connected to the detector.
The instruments supplied are NATA calibrated prior to delivery. However, before putting the system into
operation, it is recommended to check the calibration. This is especially important if the instruments are
commissioned sometime after delivery.
5.1 Preliminary Checks
Perform the following preliminary checks:
1. Verify that all connections are correct and installation complete as detailed in Section 4.
2. Check that the correct supply voltage is available to the GG2 Detector.
3. Apply power to the system.
5.2 System Calibration
Applying Test Gas
There are several test and calibration procedures which must be conducted at intervals to ensure
ongoing detector performance. Most of these procedures involve applying a test gas to the detector
using the GG2 Calibration Cup. The gas should be applied at a rate of 0.5 litres per minute.
Detector Tests and Calibration
If the GG2 Detector has spent considerable time at low or elevated temperatures, please allow the
device to stabilise to room temperature in powered-up operational (no fault) state for 24 hours before
beginning calibration. If the GG2 Detector has not experienced exposure to temperature extremes the
apparatus should be left in a powered-up operational (no fault) state for one hour before beginning
calibration. Calibration of sensors can only be achieved by using the appropriate span and zero gas. The
volume fractions of zero and calibration gases components shall be known to a relative uncertainty of ±
2% of the nominal value.
Calibration gas should be applied to the sensor at a rate of 0.5 litres per minute, using the GG2
Calibration Cup. Allow sufficient time for the sensor to stabilize before making an adjustment.
Detector calibration procedures are detailed in the following sections.
CAUTION!
Excessively large flow rates during calibration will artificially cool the
sensor and potentially pressurise the calibration cup leading to errors in
ambient gas measurements.
CAUTION!
GG2 Detectors should be tested regularly to verify proper operation. AS
2290.3 provides guidance depending on the application.
