Author Topic: Change multimeter resistors  (Read 2620 times)

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Offline TiolecoTopic starter

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Change multimeter resistors
« on: July 08, 2011, 12:27:41 am »
I have an analog multimeter with 1% resistors , and I want to exchange them for 0.5% or better, be worth doing that?
 

Offline PeterG

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Re: Change multimeter resistors
« Reply #1 on: July 08, 2011, 01:30:28 am »
A change of 0.5% wont make a visible change to an Analog meter. There is generally a larger degree of error on the meters mechanical movement.

Regards
Testing one two three...
 

Offline Kiriakos-GR

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Re: Change multimeter resistors
« Reply #2 on: July 08, 2011, 01:35:10 am »
You will archive a bit better stability against environmental temperatures.   :)

If it please you do it, why not ..   ;)
 

Online Zero999

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Re: Change multimeter resistors
« Reply #3 on: July 08, 2011, 04:07:59 pm »
If the meter is trimmed in some way, replacing the resistors will make it less accurate, not better.
 

Offline Kiriakos-GR

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Re: Change multimeter resistors
« Reply #4 on: July 08, 2011, 04:40:36 pm »
I have not see in my life yet ... production items to be trimmed in any way.
 

Offline Fox

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Re: Change multimeter resistors
« Reply #5 on: July 08, 2011, 08:29:06 pm »
If you change the resistor, at least you have to calibrate your Multimeter
But want to do that, do it with the original resistors, so you now where your meter deviates and how much.
So i won`t go into the effort of replacing the resistors.

If you really wan`t a more accurate meter you have to change at least your voltage reference to a better one and or your ADC, but this is not as easy as it seams.
 So if you want a better meter the easiest way would be to buy a better one.

As for the analog scale most of them have accuracies about 2%, so calibrating your meter is the best way to improve your measurements.
A closed Switch should have zero Ohms or less!
 


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