78 • Chapter 4: Calibration Mode
GX-6000 Operator’s Manual
17 . Connect the tubing from the demand flow regulator to the rigid tube on the probe.
Allow the GX-6000 to draw gas for one minute.
18 . Press and release the POWER/ENTER button to set the span adjustment for each
channel to the programmed values.
19 . If all channels passed calibration, the following screen sequence occurs.
20 . If any of the sensors cannot be adjusted to the proper value, a screen displays that
indicates a calibration failure and lists the sensor(s) that failed to calibrate. In the
example below, the oxygen and H
2
S channels failed calibration. The other sensors
calibrated normally.
The buzzer and alarm LEDs activate in a double pulsing pattern. Press and release
the RESET button to reset the alarm and continue to the Auto Cal Menu. After
calibrating the PID channel by following the instructions below, attempt to calibrate
the standard channels again. If the failure continues, investigate the cause. See
“Troubleshooting” on page 100.
21 . If you were using a 5-gas calibration cylinder, continue to Step 22.
If you were using a 4-gas calibration cylinder:
a. Remove the tubing from the rigid tube on the probe.
b. Unscrew the 4-gas cylinder from the regulator.
c. Screw the PID calibration cylinder onto the demand flow regulator. Continue
with Step 23.
AUTO
PASS
AUTO
AUTO CAL
CONCENTRATION
GAS SELECT
ESCAPE
4:07
CH4 O2
%LEL %
H2S CO
ppm ppm
50 12.0
25.0 50
SENSOR
O2
%
H2S
ppm
FAIL
FAIL