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Potentiometer with no resistance readings.
Potentiometer with no resistance readings.
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Old 5th December 2017, 11:52 AM   #1
Michael 5of9 is offline Michael 5of9  United Kingdom
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Question Potentiometer with no resistance readings.

We have a similar potentiometer to the one pictured here which gives no resistance readings between any of the three legs; is there any way of obtaining reference readings without altering the adjustment?

CM161229-09400603 Edited.jpg

Anagas pot values flat Edited.jpg

My thoughts were to give it a good spray with solvent switch-cleaner with the meter still connected and on
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Old 5th December 2017, 12:03 PM   #2
scottjoplin is offline scottjoplin  Wales
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If you are getting no reading at all either there is something wrong with your meter or the way you are using it. What reading do you get shorting test leads? Check range setting
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Old 5th December 2017, 12:18 PM   #3
Enzo is offline Enzo  United States
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Or whatever it is connected to is shorted.
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Old 5th December 2017, 12:21 PM   #4
jan.didden is offline jan.didden  Europe
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No reading at all does that mean it is zero or it is infinite?

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Old 5th December 2017, 12:25 PM   #5
Andrew engineer is offline Andrew engineer  United Kingdom
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Very brief reply now, more later. Glad messages are working. Cut track means pot acts only as a variable resistor (like any other resistor ie 2 connections) but can be adjusted from 0 to specified maximum. 3rd leg irrelevant.
When you say 'no resistance reading', what does the ohm meter say? 0 (or say 0.3) means short circuit, eg copper track or solder bridge. anything above say 10M means open circuit, same as connected to nothing. A pot in circuit is almost bound to have a measurable resistance between each pair of legs (except for the 3rd leg of a cut track pot, which might be connected to anything or nothing.
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