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 Post subject: Simpson 260 detailed parts
PostPosted: May Tue 17, 2022 6:44 am 
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I believe there are inductors or wire chokes but the information i can get isn't detailed enough.
Please help
Fatrask1


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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Tue 17, 2022 7:02 am 
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What series is it? I don't think any of them have those, but it would help to be sure.

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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Tue 17, 2022 7:22 am 
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Fatrask1 wrote:
I believe there are inductors or wire chokes but the information i can get isn't detailed enough.
Please help
Fatrask1

If you are referring to items like those circled, those are wire wound resistors. This is a photo of a 260-2 borrowed from simpson260.com.
Model and series can be found on the meter face.


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Simpson 260-2 WW Resistors.JPG
Simpson 260-2 WW Resistors.JPG [ 232.96 KiB | Viewed 430 times ]
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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Tue 17, 2022 12:01 pm 
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I am not aware of any of the 260 series having inductors or chokes, but most of them use wirewound resistsors. Sometimes those are air core, sometimes wound over some core or other. The parts list will tell you what they are.

All, or at least most, of the Simpson meter manuals are available at simpson360.com Unless the wirewound resistors are burned or physically damaged, they will not need replacement and should be left alone.

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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Tue 17, 2022 5:20 pm 
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Typically wound over a phenolic form, cotton covered resistance wire.


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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Wed 18, 2022 1:49 pm 
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There are wirewound resistors in a lot of VOMs made worldwide. They are usually under 5 ohms or so in value. And they hold their values unless abused badly. They can even overheat sometimes and really not change. You must really cook them to cause them to fail. The big failure in meters that have not been abused is drift in the other fixed resistors upwards in value which makes for lower readings.

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 Post subject: Re: Simpson 260 detailed parts
PostPosted: May Thu 19, 2022 12:07 am 
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Location: Peekskill, NY
There is one wire-wound resistor in a version of that meter that's prone to fail, involving measuring a large current while the (+) lead
is connected to the "+ 5 amps" terminal and the (-) lead is connected to the "common" terminal. This lets the magic smoke out of one of
those resistors.


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