10
Symptom
Possible Cause
Solution
fails to power on.
extremely low.
the same model or
specifications.
Polarities of the
batteries are reversed.
Ensure that the
batteries are correctly
installed according to
the polarity symbols in
the battery
compartment.
The thermometer is
faulty.
If the warranty period
does not expire,
contact Zewa or a local
distributor.
Only the battery
symbol is
displayed after the
thermometer
power on.
The battery level is low.
Use new batteries of
the same model or
specifications.
"Er1" is displayed.
The ambient
temperature is lower
than 10°C (50.0°F) or
higher than 40°C
(104°F).
Take a measurement
under an ambient
temperature between
10°C (50.0°F) and
40°C (104°F).
"ErC" is displayed.
An error occurs when
data is being read from
or written into the
memory, or the
temperature correction
is not complete.
Contact Zewa.
The temperature
reading is lower
than the typical
body temperature
The lens of the
temperature probe is
dirty.
Clean the lens using a
cotton swab.
The distance between
Move the thermometer
