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4) Check regularly whether safety risks exist.
5) Remove the batteries if the thermometer will not be used for more
than two months.
Troubleshooting
Problem
Possible Cause
Solution
The thermometer
fails to power
on.
Low battery
Change
the batteries.
Polarities of the
batteries are reversed.
Make sure that the
batteries are installed
correctly.
The thermometer is
damaged.
Contact the
manufacturer.
"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).
The temperature
reading is lower
than the typical
body
temperature
range.
The lens of the
temperature probe is
dirty.
Clean the lens using a
cotton swab.
The distance between
the temperature probe
and the target is too
long.
Move the thermometer
closer to the target.
The thermometer is
used within 30
minutes after being
taken from a cold
environment.
Wait for more than 30
minutes after the
thermometer is moved
into the measurement
environment.
