Technical data

Failures
61
EN
13 Failures
Failure Possible reason Solution
The meter cannot be
switched on.
Batteries are empty. Check whether the batteries
are in good contact or cor-
rect polarity or whether the
adaptor is well plugged. If
necessary change the bat-
teries.
The ON OFF key has not
been well pressed.
Keep the ON/OFF key
pressed for a second.
The current readings do not
appear.
Check whether the data
hold function is activated.
If the HOLD icon blinks at
the left top, press HOLD to
deactivate the HOLD func-
tion.
Slow Response Check whether the air flow
channels on the rear were
blocked.
If necessary clean the air
flow channels.
Error messages Significance
E01
The CO
2
sensor is out of order. Retry CO
2
calibration.
E02 The value is under range.
E03 The value is over range.
E04 The original data error results in this error (DP, WB).
E07 Battery voltage is too low for the CO
2
measurement.
Change batteries or connect the adaptor.
E11 Retry humidity calibration.
E17 Retry humidity calibration.
E31 The temperature sensor is damaged.
E34 The humidity sensor is damaged.