General Tools and Instruments CMM880 - Manual (Page 10)

? Power on but no display. Check the
battery are in place and making good
contact or correct polarity , replace a
new battery or attach optional AC
adaptor for the weak battery caused.
No Display. Make sure battery is not
empty , if the display disappear ,
check sleep mode is active. Refer to
the Disable sleep mode function for a
long time using the measurement. ?
Screen flashing. Battery low , the
batteries need to be replaced. ?
Er 1, Er 3 ,E r 4 . Circuit error , return
the unit to the store for repairing.
See Fig.L as an example. ?
Er 2 . Improper calibration; Probe
managed. ?
Er 5. Sensor damaged, send back
the unit to the store you bought for re
-pairing , Humidity reference needs
to be changed. ?
The meter x 1
Battery x 2 (AAA size )
Operation manual
Gift /plain white box x 1
This package contains:
Fig. L
MATERIAL SUPPLIED
9
TROUBLESHOOTING