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Trouble-shooting
Error message Situation Solution
No lens filter is attached. Attach new, clean lens filter.
The thermometer probe was not
positioned securely in the ear.
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
(50–104 °F or 10–40 °C).
Allow the thermometer to remain
for 30 minutes in a room where
the temperature is between
50 and 104 °F or 10 and 40 °C .
Temperature taken is not within
typical human temperature range
(93.2–108 °F or 34 –42.2 °C).
HI = too high
LO = too low
Make sure the probe tip and lens
are clean and a new, clean lens
filter is attached. Make sure the
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.
… call Braun ThermoScan
customer service at
1-800-327-7226
IRT4520/4020_NA_S4-42 Seite 10 Freitag, 18. August 2006 11:33 11