Configuration Owner's manual

207 • Calibrating GX-2012s and Gas Tracers
16. After calibration gas has been applied to the ppm sensor, fresh air will be
applied to the standard sensors (catalytic LEL, O
2
, H
2
S (GX-2012 only) and
CO) and the %volume sensor (if installed) for 45 seconds and the PC
Controller program will perform a zero adjustment.
Figure 165: Air Flowing to Standard Sensors
The PC Controller Program will analyze the zero adjustment results. If any of
the standard sensors or the %volume sensor (if installed) failed the zero
adjustment, the calibration will be aborted for that instrument.