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How to tell what sort of thermistor I have?

Posted by epicepee

epicepee

How to tell what sort of thermistor I have?
April 04, 2015 11:46PM

Registered: 11 years ago
Posts: 471

I recently bought a Geeetech round PCB bed heater. It came with an unspecified 100k thermistor. Which settings should I use (in Repetier firmware), or should I add a table? It doesn't need to be that accurate, just within 5-10C, and it should be repeatable.

If it helps, this is the heater.

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Dust

Re: How to tell what sort of thermistor I have?
April 05, 2015 10:56AM

Admin
Registered: 13 years ago
Posts: 7,008

[www.geeetech.com]

Looks to be type 11 in Marlin.

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epicepee

Re: How to tell what sort of thermistor I have?
April 05, 2015 04:18PM

Registered: 11 years ago
Posts: 471

Thank you! Do you happen to know if Repetier has a table for it?

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iamdarkyoshi

Re: How to tell what sort of thermistor I have?
April 05, 2015 05:50PM

Registered: 9 years ago
Posts: 98

I just tried different tables for mine and used multiple temperature reference points from a thermostat with a desoldered temp sensor. tried different tables until the displayed value and the thermostat displayed the same thing (or close to)

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epicepee

Re: How to tell what sort of thermistor I have?
April 05, 2015 10:41PM

Registered: 11 years ago
Posts: 471

Do you know which was the closest, ultimately?

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iamdarkyoshi

Re: How to tell what sort of thermistor I have?
April 05, 2015 10:52PM

Registered: 9 years ago
Posts: 98

my firmware is UPMarlin, for my twoup that is barely a twoup anymore. I used "100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)"
It was the best match for my Anubus clone. I bought an E3D V6, and made a heated bed from the Anubis thermistor. My original table read 275 when it was actually 235, and the values met equal at about 40 degrees.