I am using DT80 Series 3 data logger for temperature measurement via K-type thermocouple. Previously it was working well, but for past few months it is showing RefError or Over Range error on the screen. I have tried to resolve this issue but couldn't find any solution. Any kind of help in this regard will be highly appreciated.

Hi Roshan,

You can check if there is a failed status in the TEST result, if you see one, please disconnect all sensors and rerun the TEST.

If the fault remains, you have to return it for assessment. We guess there was a ground loop or voltage spike because of one of the thermocouples.

You can reach out datataker.support@thermofisher.com to get an invitation for the new forum platform.

Best regards,
dataTaker Expert