44 • Chapter 5: User Mode and Calibration
SC-04
11. 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 pg.88), the response
reading’s maximum adjustment is
displayed. A maximum span of 10.00
ppm indicates that the reading could
have been adjusted up to 10.00 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. The instrument continues to the
START
screen.
6. Remove the calibration cup.
7. 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 63.
PASS
A-CAL
SO2
5.10
A-CAL
ppm
SO2
10.00
MAX .SPAN
ppm
SO2
FAIL
A-CAL
ppm