RKI Instruments GX-2009 Manual - Manual (Page 21)

GX-2009 Operator’s Manual Start Up • 16
8. If the GX-2009 experiences a sensor failure during start up, a screen
indicating which sensor failed displays. In the example below, the CO
sensor has failed.
If you wish to continue, press and release the POWER MODE button to
acknowledge the failure. The gas reading for the failed sensor will be
replaced by “- - -”. Replace the failed sensor as soon as possible.
9. If Auto Zero Adjustment is set to On, then the GX-2009 will perform
an automatic fresh air adjustment.
If the fresh air adjustment is successful, the unit will proceed to Normal
Mode. If one or more of the sensors fails the fresh air adjustment, the
display will indicate which sensor or sensors failed. If a failure occurs,
press and release the POWER MODE button to proceed to Normal
Mode. The gas reading for the failed sensor or sensors will be replaced
by “- - -”. Replace any sensors that fail the automatic fresh air
adjustment as soon as possible.
WARNING: If the Auto Zero Adjustment feature is turned on, make
sure that you start-up the GX-2009 in a known fresh air
environment, an environment free of combustible or toxic
gasses and of normal oxygen content, 20.9%. If you do
not start-up the unit in a fresh air environment, the fresh
air adjustment will not be accurate.
10. The GX-2009 is now operating in Measuring Mode and monitoring for
gas. The Normal Operation Screen appears.
The concentrations of the target gasses are displayed along with the
time in the lower right corner and the battery charge level in the lower
left corner.
F A IL
SENSOR
CO ppm
Auto
ZERO
0 20.9
5:15
CO ppm H2S ppm
CH4 %LEL OXY vol%
0 0.0