GX-6000 Operator’s Manual
Chapter 4: Calibration Mode • 83
c. Let the instrument draw through the VOC zero filter for 1 minute before
continuing.
4 . To continue with the fresh air adjustment, press and hold the
▲
AIR button.
If you do not want to continue, press and release the DISP/LOCK button and the unit
will return to the Calibration Mode Screen.
5 . The GX-6000 will indicate that it is adjusting the zero reading for a few seconds and
then it will prompt you to release the
▲
AIR button.
6 . Release the
▲
AIR button. The fresh air adjustment will finish, the fresh air readings
will be displayed momentarily, and then the instrument will return to the Calibration
Mode Screen.
7 . If the VOC zero filter was used, remove the filter from the GX-6000’s inlet fitting or
probe. Reinstall the plugs on each end of the filter.
Performing a Span Adjustment in Single Calibration
1 . Install the demand flow regulator onto the calibration cylinder.
2 . Connect the sample tubing to the demand flow regulator.
3 . Install the sample hose and probe on the GX-6000 inlet fitting. Make sure the probe’s
two halves are tightened firmly together to avoid leaks that can affect the calibration.
See Figure 22, “Replacing the Particle Filter and Hydrophobic Filter Disk” on
page 110 for an illustration of the internal parts of the probe.
AIR
AIR CAL
HOLD AIR KEY
AIR
AIR CAL
HOLD AIR KEY
ADJUSTING ZERO
AIR
AIR CAL
RELEASE AIR KEY
ZERO ADJUSTED
AIR
AIR CAL
ZERO ADJUSTED
AIR
CH4 O2
%LEL %
H2S CO
ppm ppm
VOC
ppm
0 20.9
0.0 0
0
CAL
CAL MODE
AIR CAL
AUTO CAL
SINGLE CAL
NORMAL MODE