2. Store the meter in an area with moderate temperature and humidity
(refer to the operating and storage range in the specifications chart
earlier in this manual).
TROUBLESHOOTING
Can’t power on
Press
SET
for more than 0.3 seconds and try again. Check that the
batteries have good contact and the correct polarity or that the AC
adaptor is properly connected.
Slow response
Check whether the air flow channels on the rear of the meter are blocked.
Error messages
E01: CO
2
sensor damaged.
E02: The value is under range.
E03: The value is over range.
E04: The original data error results in this error (DP, WB)
E07: Too low voltage to measure CO
2
, replace batteries or use an
adaptor.
E11: Retry humidity calibration.
E17: Retry CO
2
calibration.
E31: Temperature sensor damaged.
E34: Humidity sensor damaged.
