GX-2003 Operator’s Manual Calibration Mode • 41
3. If necessary, use the ▲AIR and (SHIFT)▼ buttons to set the correct
combustible gas value.
4. Press and release the POWER ENTER button to enter the new
setting. The OXY calibration value begins to flash.
5. Repeat steps 3 and 4 to set the correct values for the remaining
channels. After the last channel is set, you return to the calibration
values screen and the values are no longer flashing.
NOTE: The RKI Four Gas Cylinder typically contains 12% O
2
by
volume. Be sure to set the “OXY” reading to agree with the
concentration listed on the cylinder’s label, not zero.
6. With the calibration values screen displayed, press the
POWER/ENTER button. CAL. along the left side of the LCD
begins to flash and the current gas readings are displayed.
7. Connect the tubing from the demand flow regulator to the rigid
tube on the probe. Allow the gas to flow for one minute.
8. Press and release the POWER/ENTER button to set the calibration
to the programmed values.
If all channels passed calibration, AUTO CALIBRATION PASS
displays, then the calibration menu displays.
If any of the sensors cannot calibrate to the proper value, FAIL
PUSH AIR KEY displays and the GX-2003 lists the sensor(s) that
failed to calibrate. In the example below, the OXY and H2S
channels failed calibration. The other sensors calibrated normally.
The buzzer, vibrator, and alarm lights activate. Press and hold the
▲AIR button for a few seconds to reset the alarm and return to the
calibration menu. Attempt to calibrate again. If the failure
continues, investigate the cause. See “Troubleshooting” on
page 74.
C CH4 0%LEL
A OXY 20.9VOL%
L H2S 0.0ppm
. CO 0ppm
21:09
FAIL
PUSH AIR KEY
< > < >
<O2 > < > <CO >
21:09
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