8
TROUBLESHOOTING
Power on but no display
a) Make sure the time of pressing ON/OFF key is more than 0.1 sec.
b) Check the batteries are in place and making good contact and correct polarity.
c) Replace a new battery and try again.
d) Remove the batteries for one min. and then put back for second try.
No Display
a) Check whether the low battery indicator displayed before display disappears, if yes,
replacing a new battery.
b) Check whether sleep mode is active. If yes, pressing
+ HOLD
or
ON/OFF+HOLD
key to disable auto power off function.
Er 1
Circuit error in RH measurement channel, return the meter to the store for repairing.
Er 2
Circuit error in Internal temperature measurement channel, return the meter to the store
for repairing.
Er 3
Circuit error in reference resistor channel, return the meter to the store for repairing.
Er 4
Internal temperature is out of the range.
Er 5
External temperature is out of the range.
Note:
a. Dry Bulb temperature means air (Internal) temperature. Dew point & Web Bulb are
calculated from internal temperature.
b. When the meter is on, plugging in an external probe might cause
“ER 5”
error in min.
or max mode of ext. Temperature, T2-T1 and T2-dp. pressing
“RESET”
key could solve
above question.