OT Simpson VOM question

10 messages

OT Simpson VOM question

Reply Threaded

Hi all,
I hope you don't mind this question as it's a bit of topic. I figured some of you guru's might be some help here. My fater in law bought me a Simpson 260-6P meter at a thrift store. It needs a little repair. We found one blown resistor inside. A search of the internet found a site (simson260.com) that has manuals and schematics and such. The resistor in question is a 22.5 ohm and the parts list says its wire wound. A trip to Elliot Electronics here in Tucson wasn't much help on the wire wound spec. But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the standard variety. My question is, will the not being wire wound matter much and will the .5 ohm make much of a difference. I can't seem to find a source online for Simpson parts, just places to send them to for repair. Since I'm unemployed I'd like to fix it myself if I can find the part or use these. Any ideas?
Thanks
Kelly
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evan foss

Re: OT Simpson VOM question

Reply Threaded

It is hard to tell what effect that half ohm change will have with out
the schematic. Typically meters are made with better than 5% parts
though. If the old one wasn't I guess you could get away with it. For
some reason that simson260.com wouldn't load for me.

On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:

> Hi all,
> I hope you don't mind this question as it's a bit of topic. I figured some of you guru's might be some help here. My fater in law bought me a Simpson 260-6P meter at a thrift store. It needs a little repair. We found one blown resistor inside. A search of the internet found a site (simson260.com) that has manuals and schematics and such. The resistor in question is a 22.5 ohm and the parts list says its wire wound. A trip to Elliot Electronics here in Tucson wasn't much help on the wire wound spec. But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the standard variety. My question is, will the not being wire wound matter much and will the .5 ohm make much of a difference. I can't seem to find a source online for Simpson parts, just places to send them to for repair. Since I'm unemployed I'd like to fix it myself if I can find the part or use these. Any ideas?
> Thanks
> Kelly
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Roland Wiench

Re: OT Simpson VOM question

Reply Threaded

Hello Kelly,

Go to: http://www.surplussales.com/

Then click Product Index
and click Wire wound resistors

When you get there, you are going to be like a kid in a candy store.

Roland

On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:

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Kelly Hales

Re: OT Simpson VOM question

Reply Threaded

In reply to this post by evan foss

All the other resistors inside are marked 1%. I'd like to find the right
one. Sorry it should have been www.Simpson260.com
Thanks
Kelly
----- Original Message -----
From: "evan foss" <[hidden email]>
To: "Electric Vehicle Discussion List" <[hidden email]>
Sent: Thursday, July 02, 2009 10:57 AM
Subject: Re: [EVDL] OT Simpson VOM question

It is hard to tell what effect that half ohm change will have with out
the schematic. Typically meters are made with better than 5% parts
though. If the old one wasn't I guess you could get away with it. For
some reason that simson260.com wouldn't load for me.

On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:

> Hi all,
> I hope you don't mind this question as it's a bit of topic. I figured some
> of you guru's might be some help here. My fater in law bought me a Simpson
> 260-6P meter at a thrift store. It needs a little repair. We found one
> blown resistor inside. A search of the internet found a site
> (simson260.com) that has manuals and schematics and such. The resistor in
> question is a 22.5 ohm and the parts list says its wire wound. A trip to
> Elliot Electronics here in Tucson wasn't much help on the wire wound spec.
> But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the standard
> variety. My question is, will the not being wire wound matter much and
> will the .5 ohm make much of a difference. I can't seem to find a source
> online for Simpson parts, just places to send them to for repair. Since
> I'm unemployed I'd like to fix it myself if I can find the part or use
> these. Any ideas?
> Thanks
> Kelly
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evan foss

Re: OT Simpson VOM question

Reply Threaded

I don't see the 22 Ohm resistor on the schematic. R14 is 22.5 Ohms if
I am reading that last smudged out digit correctly. If that is it then
you are ok although you really should use 1% parts in a meter. R14 is
for the 10mA setting on the meter.

On Thu, Jul 2, 2009 at 2:32 PM, Kelly Hales<[hidden email]> wrote:

> All the other resistors inside are marked 1%. I'd like to find the right
> one. Sorry it should have been www.Simpson260.com
> Thanks
> Kelly
> ----- Original Message -----
> From: "evan foss" <[hidden email]>
> To: "Electric Vehicle Discussion List" <[hidden email]>
> Sent: Thursday, July 02, 2009 10:57 AM
> Subject: Re: [EVDL] OT Simpson VOM question
>
>
> It is hard to tell what effect that half ohm change will have with out
> the schematic. Typically meters are made with better than 5% parts
> though. If the old one wasn't I guess you could get away with it. For
> some reason that simson260.com wouldn't load for me.
>
> On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:
>> Hi all,
>> I hope you don't mind this question as it's a bit of topic. I figured some
>> of you guru's might be some help here. My fater in law bought me a Simpson
>> 260-6P meter at a thrift store. It needs a little repair. We found one
>> blown resistor inside. A search of the internet found a site
>> (simson260.com) that has manuals and schematics and such. The resistor in
>> question is a 22.5 ohm and the parts list says its wire wound. A trip to
>> Elliot Electronics here in Tucson wasn't much help on the wire wound spec.
>> But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the standard
>> variety. My question is, will the not being wire wound matter much and
>> will the .5 ohm make much of a difference. I can't seem to find a source
>> online for Simpson parts, just places to send them to for repair. Since
>> I'm unemployed I'd like to fix it myself if I can find the part or use
>> these. Any ideas?
>> Thanks
>> Kelly
>> -------------- next part --------------
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>> http://lists.sjsu.edu/mailman/private/ev/attachments/20090702/00166c4a/attachment.html
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>>
>
>
>
> --
> http://www.coe.neu.edu/~efoss/
> http://evanfoss.googlepages.com/
>
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halestorm

Re: OT Simpson VOM question

Reply Threaded

In reply to this post by Kelly Hales

In a DC circuit the fact that it is wire-wound should not matter, but in
this application you probably do need to adhere to a <= 1% tolerance
resistor so your 22 ohm is out (which may be 22 ohm +/- 10%, even). Metal
foil is typically the construction of precision resistors. If you don't find
what you need through the surplus channels, you can buy these off the shelf
at places like digikey.com or mouser.com. For example,
Mouser part # 71-PTF6522R600FYBF

http://www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMtn16vD%252bEOkdyoSWWFdsY%252bNgR1Qtz63AWQ%3d

might do it.

On Thu, Jul 2, 2009 at 10:04 AM, Kelly Hales <[hidden email]> wrote:

> The resistor in question is a 22.5 ohm and the parts list says its wire
> wound. A trip to Elliot Electronics here in Tucson wasn't much help on the
> wire wound spec. But I did pick up some 22 ohm 1 watt and 2 watt resistors,
> in the standard variety. My question is, will the not being wire wound
> matter much and will the .5 ohm make much of a difference.
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Kelly Hales

Re: OT Simpson VOM question

Reply Threaded

In reply to this post by Roland Wiench

THANK YOU ROLAND
Don't know why I didn't loon there. Have it bookmarked. They truely have
way too much to look at, but had the exact part.
Kelly

----- Original Message -----
From: "Roland Wiench" <[hidden email]>
To: "Electric Vehicle Discussion List" <[hidden email]>
Sent: Thursday, July 02, 2009 11:31 AM
Subject: Re: [EVDL] OT Simpson VOM question

> Hello Kelly,
>
> Go to: http://www.surplussales.com/
>
> Then click Product Index
> and click Wire wound resistors
>
> When you get there, you are going to be like a kid in a candy store.
>
> Roland
>
>
> On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:
>> Hi all,
>> I hope you don't mind this question as it's a bit of topic. I figured
>> some of you guru's might be some help here. My fater in law bought me a
>> Simpson 260-6P meter at a thrift store. It needs a little repair. We
>> found one blown resistor inside. A search of the internet found a site
>> (simson260.com) that has manuals and schematics and such. The resistor in
>> question is a 22.5 ohm and the parts list says its wire wound. A trip to
>> Elliot Electronics here in Tucson wasn't much help on the wire wound
>> spec. But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the
>> standard variety. My question is, will the not being wire wound matter
>> much and will the .5 ohm make much of a difference. I can't seem to find
>> a source online for Simpson parts, just places to send them to for
>> repair. Since I'm unemployed I'd like to fix it myself if I can find the
>> part or use these. Any ideas?
>> Thanks
>> Kelly
>
> _______________________________________________
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> Usage guidelines: http://evdl.org/help/index.html#conv
> Archives: http://evdl.org/archive/
> Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev
>
>

Kelly Hales

Re: OT Simpson VOM question

Reply Threaded

In reply to this post by evan foss

Indeed it is R14 and 22.5 ohms. I ordered a couple 1% 3watt 22.5 wirewounds
off the site Roland posted. Thanks for the eyes on look Evan.
Kelly

----- Original Message -----
From: "evan foss" <[hidden email]>
To: "Electric Vehicle Discussion List" <[hidden email]>
Sent: Thursday, July 02, 2009 11:49 AM
Subject: Re: [EVDL] OT Simpson VOM question

I don't see the 22 Ohm resistor on the schematic. R14 is 22.5 Ohms if
I am reading that last smudged out digit correctly. If that is it then
you are ok although you really should use 1% parts in a meter. R14 is
for the 10mA setting on the meter.

On Thu, Jul 2, 2009 at 2:32 PM, Kelly Hales<[hidden email]> wrote:

> All the other resistors inside are marked 1%. I'd like to find the right
> one. Sorry it should have been www.Simpson260.com
> Thanks
> Kelly
> ----- Original Message -----
> From: "evan foss" <[hidden email]>
> To: "Electric Vehicle Discussion List" <[hidden email]>
> Sent: Thursday, July 02, 2009 10:57 AM
> Subject: Re: [EVDL] OT Simpson VOM question
>
>
> It is hard to tell what effect that half ohm change will have with out
> the schematic. Typically meters are made with better than 5% parts
> though. If the old one wasn't I guess you could get away with it. For
> some reason that simson260.com wouldn't load for me.
>
> On Thu, Jul 2, 2009 at 1:04 PM, Kelly Hales<[hidden email]> wrote:
>> Hi all,
>> I hope you don't mind this question as it's a bit of topic. I figured
>> some
>> of you guru's might be some help here. My fater in law bought me a
>> Simpson
>> 260-6P meter at a thrift store. It needs a little repair. We found one
>> blown resistor inside. A search of the internet found a site
>> (simson260.com) that has manuals and schematics and such. The resistor in
>> question is a 22.5 ohm and the parts list says its wire wound. A trip to
>> Elliot Electronics here in Tucson wasn't much help on the wire wound
>> spec.
>> But I did pick up some 22 ohm 1 watt and 2 watt resistors, in the
>> standard
>> variety. My question is, will the not being wire wound matter much and
>> will the .5 ohm make much of a difference. I can't seem to find a source
>> online for Simpson parts, just places to send them to for repair. Since
>> I'm unemployed I'd like to fix it myself if I can find the part or use
>> these. Any ideas?
>> Thanks
>> Kelly
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL:
>> http://lists.sjsu.edu/mailman/private/ev/attachments/20090702/00166c4a/attachment.html
>> _______________________________________________
>> General EVDL support: http://evdl.org/help/
>> Usage guidelines: http://evdl.org/help/index.html#conv
>> Archives: http://evdl.org/archive/
>> Subscription options: http://lists.sjsu.edu/mailman/listinfo/ev
>>
>>
>
>
>
> --
> http://www.coe.neu.edu/~efoss/
> http://evanfoss.googlepages.com/
>
> _______________________________________________
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evan foss

Re: OT Simpson VOM question

Reply Threaded

On Thu, Jul 2, 2009 at 3:36 PM, Kelly Hales<[hidden email]> wrote:
> Indeed it is R14 and 22.5 ohms. I ordered a couple 1% 3watt 22.5 wirewounds

I am known in my family as the miss reader. As a result I always
double check these things. That way I have two wrong numbers to use
instead of just one. :)

> off the site Roland posted. Thanks for the eyes on look Evan.

I am always happy to help a fellow unemployed person.

> Kelly

Evan

--
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http://evanfoss.googlepages.com/

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JS-20

Re: OT Simpson VOM question

Reply Threaded

In reply to this post by Kelly Hales

Kelly Hales wrote:
My father in law bought me a Simpson 260-6P meter at a thrift store.
It needs a little repair.

We found one blown resistor inside.

A search of the internet found a site (simson260.com) that has manuals
and schematics and such.

The resistor in question is a 22.5 ohm and the parts list says its wire
wound.

I have the manual for the model 260 series III, which lists it as R18.
An examination of the schematic shows it as part of a voltage divider
for the current scales, and may affect all of them.

The part number from simpson is 0-008133

John in Sylmar, CA

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