Author Topic: trimmer test  (Read 2654 times)

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Offline rizomaTopic starter

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trimmer test
« on: March 14, 2014, 01:01:11 pm »
Hi guys I got some chinese trimmers  they look exactly like the bourns 3296 but instead are boater 3296 I would like test  them to some degree... Basic stuff Any advice?

Maybe that is the wrong section, sorry!
Regards
 

Offline mcinque

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Re: trimmer test
« Reply #1 on: March 14, 2014, 06:44:29 pm »
I guess that a multimeter in Ohm scale would do the job.
 

Offline Holograph

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Re: trimmer test
« Reply #2 on: March 14, 2014, 06:50:14 pm »
You can check with an ohmmeter (as mentioned) while turning them to see if the resistance change is smooth. But most likely if they are cheap quality it will wear out a lot quicker - it might not always be obvious when the parts are new if they are poor quality.

What do you intend to trim with them? You could also check them with AC voltage of varying frequency to see if the resistance/impedance is stable.
« Last Edit: March 14, 2014, 06:52:42 pm by Holograph »
 

Offline robrenz

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Re: trimmer test
« Reply #3 on: March 14, 2014, 07:17:11 pm »
Trimmers are designed for a very limited number of adjustment cycles anyway. Typical is in the 10 to 200 cycles.

Offline deth502

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Re: trimmer test
« Reply #4 on: March 14, 2014, 07:29:10 pm »
i use an analog meter to make sure they are qworking smoothly. good chance youll never notice a quick dip in the reading with a dmm.

if you want to get real fancy, run some voltage through them and set your o-scope to .5 sec/div.
 

Offline rizomaTopic starter

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Re: trimmer test
« Reply #5 on: March 15, 2014, 02:46:18 am »
I was taking about noise ratio, temperature stability, audio behavior thanks for the hints, the oscilloscope and feed a voltage seems a good idea, maybe I can compare before and after...
The application it's for an Audio Vco
« Last Edit: March 15, 2014, 02:50:36 am by rizoma »
 

Offline mcinque

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Re: trimmer test
« Reply #6 on: March 15, 2014, 07:02:07 am »
I was taking about noise ratio, temperature stability, audio behavior

In that case a DSO is absolutely required, as suggested. You can try also to pass audio frequency to them and see their behaviour.
« Last Edit: March 15, 2014, 07:05:10 am by mcinque »
 


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