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Trouble-shooting
Error message Situation Solution
No lens filter is attached. Attach new, clean lens filter.
The thermometer cannot identify
a secure position of the probe.
An accurate measurement was
not possible.
POS = position error
IRT 4020:
Clear the display by
pushing the «start» button once.
IRT 4520: Clear the display by
pushing the «I/O» button once.
Take care that the positioning of
the probe is correct and remains
stable.
Ambient temperature is not within
the allowed operating range
(10 40 °C or 50 104 °F).
Allow the thermometer to remain
in a room for 30 minutes where
the temperature is between
10 and 40 °C or 50 and 104 °F.
Temperature taken is not within
typical human temperature range
(34 42.2 °C or 93.2108 °F).
HI = too high
LO = too low
Make sure a new, clean lens filter
is attached and thermometer is
properly inserted. Then, take a
new temperature.
System error – self-check display
flashes continuously and will not
be followed by the ready beep
and the ready symbol.
If error persists,
If error still persists,
Wait 1 minute until the thermo-
meter turns off automatically, then
turn on again.
... reset the thermometer by re-
moving the batteries and putting
them back in.
… have the thermometer checked
at a Braun Customer Service
Center.
6022434_IRT_AP_N Seite 10 Donnerstag, 21. September 2006 2:31 14
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