LED number 4 is blinking and the ready light is off

- Infrared sensor track defective

Step 1

Open the inspection cover..   the infrared filter glasses are dirty..   clean the glasses with a cotton
stick (10036) and alcohol (10035)
Close the inspection cover.          


If this does not help, do as follows..

Replace measuring head housing
and electronic module.
Use our ExP for this procedure

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