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TC-08 Power

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TC-08 Power

Postby oguz » Tue May 12, 2015 1:48 pm

Hi,

I used TC-08 to measure temperature with my laptop but when but when I plugged my laptop my values ​​are distorted. Which solution you offer me ?

Thank you
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Re: TC-08 Power

Postby Martyn » Wed May 13, 2015 8:15 am

I take it you mean the plug in the laptops power supply, these can be a source of noise which can have an effect on readings.

Is it the original power supply that came with the laptop ?
Does it have a true earth connection ? Two wire or three wire from the socket to the brick ?
Martyn
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Re: TC-08 Power

Postby oguz » Mon May 18, 2015 11:48 am

Hi Martyn,

yes its a original charger with two wire from the socket to the brick

Thanks
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Re: TC-08 Power

Postby Martyn » Wed May 20, 2015 6:52 am

What are you measuring the temperature of ? and are the bare ends of the thermocouples touching the surface ?
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Re: TC-08 Power

Postby oguz » Wed May 20, 2015 12:16 pm

I measure the temperature of my oven standard(stallion). Yes can be that my thermocouples affects(touches) the surface but it is not the reason of the defect.
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Re: TC-08 Power

Postby Martyn » Thu May 21, 2015 1:38 pm

If the thermocouple tips are touching a surface that is grounded, and the laptop power supply is connected to a different ground then it is possible to pull the TC08 outside it's common mode operating range, due to a ground loop, which would result in incorrect readings.

If you insulate the thermocouple tips, and the issue still remains, then it is due to noise created by the power supply.
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