Control Displays and Symbols
LCD Display
Error Messages
LCD Display
6
Display Meaning
Thermometer is running a built-in test.
Memory shows previous
temperature reading.
Thermometer is ready to take
a reading.
Measurement complete.
Low battery.
Display Meaning
Measured temperature
too high
Measured temperature
too low
Ambient temperature
too high
Ambient temperature
too low
Error function display
Blank display
Dead battery indication
What to Do
Wait for memory display.
Wait for ready display.
Insert ear thermometer into ear and press
"START" button.
Read temperature.
See instructions on page 7 for
"Replacing the Battery".
Description
Displays "H" when measured
temperature higher than
42.2˚C or 108.0˚F. Emits three
short beeps and red LED is on
for 5 seconds.
Displays "L" when measured
temperature lower than 32.0˚C
or 89.6˚F. Emits three short
beeps and red LED is on for
5 seconds.
Displays "H" in conjunction
with the "s" when ambient
temperature is higher than
40.0˚C or 104.0˚F. Emits three
short beeps and red LED is on
for 5 seconds.
Displays "L" in conjunction
with the "s" when ambient
temperature is lower than
5.0˚C or 41.0˚F. Emits three
short beeps and red LED is on
for 5 seconds.
When system has malfunction.
Emits three short beeps and
red LED is on for 5 seconds.
Possible Cause and Fault Remedy
Probe may not have been
inserted properly. Take another
measurement.
Probe may not have been
inserted properly. Take another
measurement.
Ambient temperature is higher
than 40.0 °C or 104.0 °F.
Ambient temperature is lower
than 10.0 °C or 50.0 °F.
Thermometer has malfunctioned.
Turn it off and take another
measurement.
Please check if the battery has
been loaded correctly. Also
check polarity (+ and -) of
batteries.
If the steady battery icon is the
only symbol shown on the
display, the battery should be
replaced immediately.