GX-6000 Operator’s Manual Calibrating Using the Auto Calibration Method • 72
4 . The Calibration Mode Screen displays with the cursor next to AIR CAL.
5 . Press and release the POWER/ENTER button. The Fresh Air Reading
screen will display.
6 . If you suspect any low-level VOC background in the area, you will need
to use the VOC zero filter.
NOTE: If you have both a VOC and a CO
2
sensor installed, you will need to
follow the directions in “Performing a Demand Zero for Instruments
with a Carbon Dioxide Sensor and a PID Sensor” on page 198
instead of following the directions shown below.
a. Remove the plug from each end of the VOC zero filter.
b. Attach the VOC zero filter to the inlet fitting or probe. The filter does
not have a preferred flow direction.
c. Let the instrument draw through the VOC zero filter for 1 minute
before continuing.
7 . 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.
CAL
CAL MODE
AIR CAL
AUTO CAL
SINGLE CAL
NORMAL MODE
AIR
CH4 O2
%LEL %
H2S CO
ppm ppm
VOC
ppm
0 20.9
0.0 0
0