INSTALLATION & OPERATING DATA
8 CALIBRATION
continued
8.3
Calibrate ZERO
Apply purge air, at a flow rate of 0.2 to 1 l/min, for a few
seconds to clear all remnants of gas.
AIR
The Gas Sensing Module will automatically return to
the NORMAL measuring mode if NO pushbuttons are
operated within 60 seconds.
Press CALIBRATE ZERO (5 seconds) until the indicator is flashing
GREEN (3 times).
Release and the indicator will briefly show RED to denote
ZERO setup.
The Gas Sensing Module will commence auto-zero.
Once the auto-zero has completed, the indicator will briefly
show amber to indicate trim mode has been entered.
G
G
R
G
TRIM MODE
Trim mode allows the output from the GSM to be adjusted to
give an accurate 'zero' level. During this mode, the CALIBRATE ZERO
button decreases the output signal and the CALIBRATE SPAN
increases it. Once set, the GSM will return automatically to
normal mode about 25 seconds after the last button press.
15/25
ISSUE N 06/15
