48 • Chapter 5: User Mode and Calibration
04 Series for CO(-H2)
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.90), 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. The instrument continues to the
E-
CAL
CYL B
screen.
6. If you are calibrating the H
2
response,
unscrew the regulator from the CO
cylinder and screw it into the H
2
cylinder.
7. Press and release POWER MODE to
start the H
2
calibration.
8. Repeat Step 8 through Step 11.
9. After the H
2
response is calibrated, the
instrument continues to the
START
item in the
E-CAL
menu.
10. If you did not calibrate the H
2
response, use AIR to scroll to the
START
item in the
E-CAL
menu.
11. Remove the calibration cup.
12. 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
E-CAL
CYL A
screen in
the
E-CAL
menu.
6. See “Troubleshooting” on page 65.
PASS
E-CAL
CO
51
E-CAL
ppm
CO
91
MAX .SPAN
ppm
CO
FAIL
E-CAL
ppm
