RKI Instruments SDM-2012 PC Controlled Configuration User Manual

Page 212

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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.

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