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Troubleshooting Guide
6
6-2
Problem Solution
The display is either a. Clean the thermometer lens.
erratic or stays at Refer to Section 5.1.
one reading
b. Activate the Diagnostic Program in
the thermometer as follows:
c. Press the key.
d. Hold down the key and press
the key until “VER X.X” is
displayed.
You can expect to see and hear the following:
• You will see the version number “VER X.X” of the
software for about 1 second.
• You will hear a beep, “TST” is displayed, and °F
flashes.
• Soon after, all of the segments of the display
including the backlighting will light up for about
1 second.
• The display will clear and a PAS (pass) or ERR (error)
code may be seen on the display.
If you see an error code, either “ERR1”, “ERR2”, or
“ERR3”, record the code and call our Customer
Service Department. Provide Customer Service with
the error code that is displayed in the upper left
corner of the display. The Customer Service
Department representative may ask you to return the
thermometer to the factory.
• The display will go back to the Real Time Mode
(Emissivity Display Mode).
e. After running the diagnostic
program, press the key to
release this mode.