STATUS SCIENTIFIC CONTROLS
FGD3 Infrared Gas Detector Heads
TD06/024
Issue:
7
Change Note:
1904
Page 16
5.2.1
C: 1 - Zero Sensor
This is a calibration feature. It allows the instrument to determine the sensor output
under zero gas conditions.
•
Apply zero gas to the sensor inlet and allow enough time for the sensor to
respond and all the gas to be purged (typically 2 minutes minimum
dependent upon flow rate).
•
Select menu mode
C: 1
(refer to section 5.2) and press ENTER.
•
Press ENTER to perform the ZERO calibration. Pressing MENU instead of
ENTER aborts the calibration (the ZERO factor will still be displayed on exit).
•
Press MENU
– the display will show the ZERO factor for the instrument
before returning to its standard mode of operation.
The ZERO factor should be recorded on any calibration certificates completed.
Note: For Hydrocarbon sensors
If there is 0% Hydrocarbon gas present in the atmosphere then the instrument can be
zeroed in air.
Note: For Carbon Dioxide sensors
There is Carbon Dioxide gas present in the atmosphere and as such zero gas must be
applied before the instrument can be zeroed.
Summary of Contents for FGD 3 Series
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