Comper IR-EFT, Instructions For Use Manual, Page: 12 / 20

10
Troubleshootings
Symptom Possible cause Solution
High
measurement
result
The thermometer is used within 30
minutes after taking from a cold
Remove the thermometer from the
situation and wait for 30 minutes in
a steady-state room condition before
taking a temperature.
The thermometer probe is exposed
to direct sunlight for a long time.
The thermometer is used on an
individual in excited emotion
Please take measurement after
getting calm.
Low measurement
result
Sweating body
Dry the body and wait for 30
minutes after swimming, bathing or
sweating.
The probe is dirty.
Clean the probe with a soft clean
cloth dipped with 70% alcohol.
The thermometer is used
immediately after getting in room
from outdoors in cold weather.
Please wait until the body warms up
before taking a measurement.
Difference in
measurement
results
Measurements were not taken on the
same body parts.
Take and compare the
measurements from the same body
parts, e.g the same right ear.
The forehead or ears are covered
with foreign body. Remove the foreign body before
taking a measurement.
“ErH ” is displayed
Hardware failure Please contact your supplier.
“ErE ” is displayed
Memory failure Please contact your supplier.
3 short beeps and
“Lo
” is displayed
The measured forehead temperature
is lower than 32
℃
(89.6
℉
).
The measured ear temperature is
lower than 22
℃ (71.6 ℉ ).
Check if the forehead probe is
installed properly and please attach
the probe to the center of forehead to
take measurements.
Take measurements after confirm
the ear probe cover and the probe are
clear.
3 short beeps and
“H1
”
is displayed
The measured temperature is higher
than 43
℃ (109.4℉)
Check if the probe and ear probe
cover are in good condition before
taking a measurement.
3 short beeps and
“Err
”
is displayed
The time interval between two
measurements are less than 3
seconds. Wait for 3 seconds and take another
measurement after hearing a short
beep indication.
The ambient temperature exceeds
15.0℃-40.0℃
（
59.0℉-104.0℉
）
Make sure that both user and
thermometer have stayed in a 15℃-