Thermo Fisher Scientific Thermo Scientific Temp 340 - Manual (Page 33)

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24. TROUBLE SHOOTING
The following chart lists the most probable
faults. There are no internal adjustments
or user-replaceable parts.
FAULT ACTION
NO
Display
Check condition of batteries.
Check that batteries are inserted
properly.
Display
Shows
OPEN
No Thermistor connected in the
Connector
Display
Shows
Err
If display shows this message
other than during the field
calibration mode, please return the
instrument for servicing
Cannot
connect
to PC
Ensure that the meter is powered
on and measuring prior to
connecting to USB port. Before and
after the driver is installed, your PC
may not recognize the Temp-340 if
the Temp-340 is not powered on
prior to connecting the USB to the
computer.