HS-04 Operator’s Manual Chapter 5: User Mode and Calibration • 49
10. The table below describes the 2 calibration outcomes.
Calibration Passed Calibration Failed
1. The instrument indicates that the
calibration passed.
2. The instrument shows the current gas
reading.
3. If MAX.SPAN is set to ON (default is
OFF, see page 95), the response
reading’s maximum adjustment is
displayed. A maximum span of 100
ppm indicates that the reading could
have been adjusted up to 100 ppm. 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.
4. Close the regulator.
5. Remove the calibration cup.
6. Press and release POWER MODE to
enter Measuring Mode.
1. The instrument indicates that the
calibration failed.
2. Close the regulator.
3. Unscrew the regulator.
4. Remove the calibration cup.
5. Press and release POWER MODE to
return to the A-CAL screen in the A-
CAL menu.
6. See “Troubleshooting” on page 70.
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