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RKI Instruments SDM-2012 PC Controlled Configuration User Manual

Page 110

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105 • Calibrating a Gas Tracer

16. After calibration gas has been applied to the ppm sensor, fresh air will be

applied to the standard 3 sensors (catalytic LEL, O

2

, and CO) and the

%volume sensor (if installed) for 45 seconds and the PC Controller program
will perform a zero adjustment.

Figure 83: Air Flowing to Standard 3 Sensors

The PC Controller Program will analyze the zero adjustment results. If any of
the standard 3 sensors or the %volume sensor (if installed) failed the zero
adjustment, the calibration will be aborted.