Troubleshooting Guide; Changing Batteries - Beurer FT 90 Mode D'emploi

9. Troubleshooting Guide

Error Problem
message
Measurement during self-
test, device not yet ready for
measurement.
Room temperature below <10 °C or
over 40 °C (<50 °F, >104 °F).
(1) Forehead temperature mode:
The temperature recorded is
higher than 42.2 °C (108 °F).
(2) Object temperature mode: The
temperature recorded is higher
than 80 °C (176 °F).
(1) Forehead temperature mode:
The temperature recorded is
lower than 34 °C (93.2 °F).
(2) Object temperature mode: The
temperature recorded is lower
than -22 °C (-7.6 °F).
The batteries are empty.

10. Changing batteries

The device requires two AAA (LR03) batteries.
• Open the battery compartment.
Use a pointed object to press down on the battery
compartment lock and at the same time slide the
battery compartment downwards.
Solution
Wait until the forehead symbol stops
flashing.
Room temperature must be between
10 °C and 40 °C (50 °F and 104 °F).
Operate the thermometer only between the
specified temperature ranges. In the event
of a repeated error message, contact your
retailer or Customer Services.
Operate the thermometer only between the
specified temperature ranges. In the event
of a repeated error message, contact your
retailer or Customer Services.
Replace the batteries.
18