Technical Manual
SureTemp
®
Model 670/SureTemp 4
®
Model 675 29
Troubleshooting Table (continued)
SYMPTOM POSSIBLE CAUSE PROCEDURE
Monitor mode
temperature reading too
high
Probe malfunction Change probe or test calibration of
entire system (instrument and probe)
with the M9600 Calibration Tester.
Instrument malfunction. Check calibration with Cal Key.
Normal mode
temperature reading too
low.
Probe malfunction. Recharacterize probe. (remove
completely from instrument and re-
install.)
Or change probe.
Or test calibration of entire system
using 9600.
Instrument malfunction Check calibration with Cal Key.
Improper placement of
probe.
Probe must be under the tongue and
as far back as possible into the
sublingual pocket.
Normal mode
temperature reading too
high.
Probe malfunction. Recharacterize probe. (remove
completely from instrument and re-
install.)
Or change probe.
Or test calibration of entire system
using 9600.
Instrument malfunction Check calibration with Cal Key.
Improper technique. Movement in mouth after insertion and
before final temperature is displayed
can cause high readings. Place probe
quickly into sublingual pocket and hold
still.
Improper technique. Do not place probe in mouth until
display is showing “OrL”.
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