RKI Instruments SDM-2012 PC Controlled Configuration - Manual (Page 210)

205 • Calibrating GX-2012s and Gas Tracers
14. The pumps will start and the program will indicate that air is flowing. The AIR
indicator on the program screen will be on. The CAL
S
LED on the SDM-2012
control panel will begin to flash amber. Air will be applied to the ppm sensor for
45 seconds, then the PC Controller Program will perform a zero adjustment on
the ppm sensor.
If at any point during the calibration you wish to cancel the calibration, click the
Cancel button in the lower right corner of the screen. The calibration will be
aborted and the CAL
S
LED will turn solid amber.
Figure 163: Air Flowing, PPM Sensor
The PC Controller Program will analyze the zero adjustment results. If the ppm
sensor failed the zero adjustment, the calibration will be aborted for that
instrument.