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Thread: Probes
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05-10-2010, 02:52 PM #1
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Probes
Could anyone please help?
I have a number of probes & cant distinguish which is which PTC or NTC & is the NTC for the evaporator reading?
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05-10-2010, 04:49 PM #2
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Re: Probes
PTC Positive Temperature Coefficient
Originally Posted by refrep
Could anyone please help?
I have a number of probes & cant distinguish which is which PTC or NTC & is the NTC for the evaporator reading?
NTC Negative Temperature Coefficient.
Most electronic controllers can identify which type is connected, but you should have them all the same ie. either all PTC or NTC
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22-10-2010, 12:05 PM #3
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Re: Probes
Me too have bunch of this probes mixed up. i'm using a ID 985LX eliwell controller, but it can't distinguish which one is which. any help on how to distinguish? Originally Posted by B G Scott
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22-10-2010, 12:10 PM #4
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Re: Probes
Check the rsistance at 20°C,
PTC = 1KΩ
NTC = 10KΩ
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23-10-2010, 04:54 PM #5
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Re: Probes
Eliwell probes, blue is NTC and grey is PTC or measure them like Chemi explained. Originally Posted by Jundeb
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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23-10-2010, 05:12 PM #6
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Re: Probes
Hey Guys.
I thought it was simpler than that.
Meaning that a PTC - rise in temp = rise in resistance?
Therefore NTC - rise in temp = drop in resistance?
Or have I got it completely wrong?
Cheers Grizzly.
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23-10-2010, 05:48 PM #7
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Re: Probes
Thats how i understand it, just warm one up and see which way the resistance goes to see what type it is, then there are a few different resistance too. Like 1k and 10k at the same temp for example. Originally Posted by Grizzly
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24-10-2010, 08:15 AM #8
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Re: Probes
In fact, there are more than hundred different NTC and PTC types.
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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