Trouble-shooting
Error message | Situation | Solution |
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| No lens filter is attached. | Attach new, clean lens filter. |
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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 | Make sure the probe tip and lens |
typical human temperature range | are clean and a new, clean lens |
(93.2 – 108 °F or 34 – 42.2 °C). | filter is attached. Make sure the |
| thermometer is properly inserted. |
HI = too high | Then, take a new temperature. |
LO = too low
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| System error – | Wait 1 minute until the thermo- |
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| flashes continuously and will not | meter turns off automatically, then |
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| be followed by the ready beep | turn on again. |
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| and the ready symbol. |
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| If error persists, | ... reset the thermometer by re- |
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| moving the batteries and putting |
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| them back in. |
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| If error still persists, | … call Braun ThermoScan |
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| customer service at |
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