83 • Chapter 5: User Mode and Calibration GX-3R Pro Operator’s Manual
Option C from Flow Chart Option D from Flow Chart
• Calibration passed
• One cylinder assigned
• Auto Start After Successful Cal set to OFF (factory setting is
ON)
• Calibration failed
1. The instrument indicates that all channels passed the
calibration.
2. The instrument shows the current gas readings.
3. If DISP MAX SPAN is set to ON (default is OFF, see page
196), the response reading’s maximum adjustment displays.
A maximum span of 100% LEL on the combustible channel
indicates that the reading could have been adjusted up to
100% LEL. If the maximum span value is close to the
calibration gas value, the sensor should be replaced soon.
The maximum adjustment is either twice the calibration
value or full scale, whichever is lower. The maximum
adjustment for the oxygen channel is 25.0% volume.
4. If the combustible gas sensor is nearing the end of its useful
life, the reading conversions that can be made in Display
Mode’s HC GAS LIST item become limited. Press and
release POWER MODE. See page 48 for the limited
conversion list. Replace the combustible sensor as soon as
possible.
5. Close the regulator.
6. Unscrew the regulator.
7. Remove the calibration cup.
8. The instrument continues to the START MEASURE item in
the AUTO CAL menu.
9. Press and release POWER MODE to enter Measuring Mode.
1. The instrument indicates which channels failed the
calibration.
2. Close the regulator.
3. Unscrew the regulator.
4. Remove the calibration cup.
5. Press and release POWER MODE to return to the AUTO
CAL CYL X screen in the AUTO CAL menu.
6. See “Troubleshooting” on page 118.
MAINTE 7:49
11.9
O2 %
47 47 23.3
CH4 %LEL CO ppm H2S ppm
AUTO CAL
MAINTE 7:49
25.0
O2 %
100 70 48.5
CH4 %LEL CO ppm H2S ppm
MAX SPAN
MAINTE 7:49
11.9
O2 %
FAIL 47 23.3
CH4 %LEL CO ppm H2S ppm
AUTO CAL
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