
6Troubleshooting Guide
  | Problem | Solution  | 
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  | The thermometer is  | Remove and reinstall the batteries or  | ||||
  | “locked up” (the  | disconnect and reconnect the ac  | ||||
  | display is “frozen”).  | adapter.  | 
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  | The display is either  | 1. Clean the thermometer lens.  | ||||
  | erratic or stays at one  | Refer to Section 4.2.  | 
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  | reading.  | 
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  | 2. Activate the Diagnostic Program in  | ||||
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  | the thermometer as follows:  | ||||
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  | a. Pull the trigger and press the  | ||||
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  | key to lock the trigger.  | ||||
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  | b. Hold down the  | key and  | |||
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  | press the  | key until  | |||
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  | “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
1second.
•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
1second.
•The display will clear and a PAS (pass) or ERR (error) code may be seen on the display.
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