Problem with logger.

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MarkPetrie
Newbie
Posts: 0
Joined: Mon Nov 21, 2022 3:36 pm

Problem with logger.

Post by MarkPetrie »

Hello.

I'm using a TC-08 with 8 inputs, all type K.
ch 1 is about 800C, the others are about 11C
The readings are 250C for ch 1, 23-25 C for the other 7 channels.
If I disconnect ch1, all the other readings drop down to [the correct] 11C.
Additionally, sometimes, the readings all change to the correct ones. I haven't been able to determine a pattern for that effect.

Laptop is a PC.
Cheers
Mark

Martyn
Site Admin
Site Admin
Posts: 4238
Joined: Fri Jun 10, 2011 8:15 am
Location: St. Neots

Re: Problem with logger.

Post by Martyn »

It sounds as if the tip of thermocouple 1 is touching a conducting surface, and the readings return to correct values when a heater or similar switches off.

Try electrically isolating the tip.
Martyn
Technical Support Manager

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