UEi Test Instruments AQM4 User Manual
Page 18
When the accuracy becomes a concern,
return to UEi for standard calibration. It
is necessary to have standard CO gas for
calibration.
CAUTION:
Do not calibrate the meter in the air with
unknown CO concentration. It could be
calibrated as 400ppm by default which
leads to inaccurate measurements.
Will Not Power On
- Press for more than 3 seconds.
- Check that the adaptor is connected
and on.
- Check that battery level is sufficient
and properly installed.
Readings Not Changing
- Check whether data hold function is
activated (HOLD icon is at the left top).
Slow Response
- Check the air flow channels on
the rear. Verify no blockage exists.
Error Messages
EO1/E33: CO² sensor is out of order. Try new
battery first.
E02:
The value is under range.
E03:
The value is over range
E04:
The original data error results in
this error (DP, WB)
CO CALIBRATION
TROUBLESHOOTING
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