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While some people use a much more exhaustive and precise testing procedure, a very simple test can uncover the most common problems with a thermistor:
* measure the resistance of the thermistor at room temperature with an ohmmeter.
If this resistance is 0 (short) or infinity (open), then something is connected incorrectly or the thermistor has been destroyed.
(These are the most common problems).
If that test looks good, then a followup test can uncover nearly all the remaining possible problems with a thermistor:
* put icewater in a ziplock bag and press it against the thermistor. Then measure the resistance of the themistor at freezing.
The two measured values of resistance are usually adequate to identify what kind of thermistor it is.
If both values are practically the same, then it's not really a thermistor -- perhaps someone has accidentally substituted a resistor.
If one or both values are not the expected values,
perhaps someone has accidentally substituted a different kind of thermistor.
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∙ 12y ago
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Is potentiometer and Thermistor are variable resistors. How please explain?
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Is potentiometer and Thermistor are variable resistors. How please explain?
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