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Info Request - Simpson 255 VOM

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  • Info Request - Simpson 255 VOM

    I'm sure many forum members that are into electrical or electronics work know about the famous Simpson 260 VOM Multimeter, but have any of you ever heard of or seen the similar model 255? Yes, there really was a model 255 made and they are pretty similar but there's got to be something different. Any info would be great. I've tried searching but so far haven't found much. A call to Simpson Electric Co. support came back with that they know they used to make them, but their info got lost when they moved some time ago. As best we could figure, most likely it's the same as a 260 but may have special ranges or other features.

    The people that host the web site www.simpson260.com said they have not seen a 255 but they are sure such were made, but not currently.

    When I saw the new 260 series 9, I really think it's so different that it should not be called a 260 and needs it's own new model number. Also, if you ever saw the original version of a 260 it's quite different from the series 2 and onward.

  • #2
    Re: Info Request - Simpson 255 VOM

    What's wrong with this manual?

    http://www.simpson260.com/downloads/...ser_manual.pdf

    There's a schematic there also.

    I have an old 260 in the roll top case. It is packed away or I would drag it out and take a photo and see what model it is, but I have had it at least 25 years and it was used when I bought it. Takes a odd ball battery as I remember, one of the two batteries that is.
    "It's a table saw, do you know where your fingers are?" Bob D. 2006

    https://www.youtube.com/user/PowerToolInstitute

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    • #3
      Re: Info Request - Simpson 255 VOM

      Thanks for the manual for the 255. I was hoping to find some good pictures of a 255 inside and out.

      OK Now I see what the 255 is about. It has the taught band movement that was in a 260 series 6, but much more like a 260 series 5 on the inside and has a special jack for use with a thermocouple for temperature reading. Needless to say there are some circuit changes too.

      Now I'll have to go on a prowl and try to find one of them in good enough condition so I might take some pictures of it. I have far too much good junk around and must get rid of it soon.

      As for the 260s the very first of them from waaaay back used (2) special 3 Volt batteries in series which were soldered in place. Put simple it was a 3/4 A$$ design. They also used a C cell with wires soldered to it. The next series and up until the series 6 (if memory is right) had (1) D cell and (4) AA cells but in a much more reasonable configuration. The series 6, 7, and 8 along with a few others use a D cell and a 9 Volt snap (1604) type battery.

      The Triplett 630 series and some of their model 60s use (1) D cell and also a wild 30 Volt battery which today can be replaced with an Eveready #413. The origional was made for Triplett by Burgess.

      Sometime I'm sure I'll find out what's different about the Simpson 255 from the 260 of the same era. My bet is they are the same other than for ranges.

      The pictures below show the insides of a Simpson 260 series 1 only they didn't have "Series 1" on the face. That came along after the series 2. A casual look at a series 2 through series 8 and they look very much alike. With a careful look you'll see changes.

      Inside of 260 (first version) What a shame that someone didn't remove the AA and C cells before they leaked. The AA cells are someone's wild way to make up the special 3 Volt batteries.
      http://simpson260.com/260-1/simpson_...nside_left.jpg
      http://simpson260.com/260-1/simpson_...side_right.jpg
      http://simpson260.com/260-1/simpson_...inside_top.jpg
      http://simpson260.com/260-1/simpson_...ide_bottom.jpg

      The picture is of an Eveready #413 battery just in case anyone is interested. The current Triplett 630s still use it. I would think they would have changed over to using (3) type 1604 9 Volt batteries series connected but oh well.

      Bob, Regarding your 260: The roll top cases are still made and are a nice addition. As for which one you have, take a good look at the face in the lower center. It should have a series number unless it's a series 1 or 2. They will say 20,000 Ohms/Volt DC and 1,000 Ohms / Volt AC. The newer ones are 5,000 Ohms/Volt AC.

      My personal favorite which I really think needs it's own non 260 model number is the 260 series 6XL series. They have extra ranges and a low power resistance feature. Inside they are really made well. For anyone wanting a new 260, I recommend not getting the standard series 8 but to look hard at the bright yellow series 8XI and 8XIP industrial version. There are differences and some parts are higher quality. Also, they use standard banana plug jacks. I guess the new reversed ones are safer but they make for PITA when you need to use older accessories or your own special test leads.
      Attached Files
      Last edited by Woussko; 08-16-2008, 02:11 AM.

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      • #4
        Re: Info Request - Simpson 255 VOM

        If anyone needs test leads for VOMs, DMMs and more here is a web site for Oldaker Corp. the company that made many of them for Simpson and Triplett until they started either making their own or having them made by a cheaper company. Oldaker is a small company and is 100% USA based. Sadly some of the parts they have to buy may not be made here, but they try hard to buy only USA made parts when they can do so. They setup a special web site where you can buy most of their products direct. Sometimes I've seen some of the more common Oldaker test lead kits/sets on eBay for nice prices.

        Oldaker main site - http://testleads.net/

        Oldaker buy direct site which they setup - http://www.usprobes.net/

        I've used them for custom test leads. They are a very willing company to work with. It's very different when you can actually talk by phone with the owners.

        Here is a kit of quality clip leads that are the result of my begging them to make this up about a year ago. They listened to me!!! I asked for white to be included and it will be upon asking. They made these up using what was on hand at the time. They had run out of white clip boots when the picture was taken and blah blah blah. These are very different from the cheapo Made in China clip leads at sold Radio "Rat" Shack or seen all too many times on eBay.
        http://www.usprobes.net/2616kit.htm

        Clips are Mueller #BU-60 with Mueller # BU-62 boots. Test lead wire is fine stranded 18 ga. copper similar to Belden #8899 which has a rubber and not a stiff PVC jacket.

        Woussko command - HUSH Woussko, Hush
        Last edited by Woussko; 08-16-2008, 02:12 AM.

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        • #5
          Re: Info Request - Simpson 255 VOM

          Originally posted by Woussko View Post

          The people that host the web site www.simpson260.com said they have not seen a 255 but they are sure such were made, but not currently.
          Well, you never talked to me, and Simpson260.com is MY website. Try looking on the main page under "250 Series" and you will see my photos of one I had.

          Or direct: http://simpson260.com/255/simpson_255.htm


          Thanks all for looking at my site.


          Paul Perkins
          Asheville, NC

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          • #6
            Re: Info Request - Simpson 255 VOM

            Thanks Paul for the info. You have a great web site for sure.

            Woussko command: HUSH Woussko, Hush ... BAD Dog

            My brain gets *&^%$#$ and I howl for no good reason.
            Last edited by Woussko; 08-16-2008, 06:53 AM.

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            • #7
              Re: Info Request - Simpson 255 VOM

              Originally posted by Radiac View Post
              Well, you never talked to me, and Simpson260.com is MY website. Try looking on the main page under "250 Series" and you will see my photos of one I had.

              Or direct: http://simpson260.com/255/simpson_255.htm


              Thanks all for looking at my site.


              Paul Perkins
              Asheville, NC
              Thanks for taking the time to create that site Paul, very nice and helpful.

              Bob, N2IPH
              "It's a table saw, do you know where your fingers are?" Bob D. 2006

              https://www.youtube.com/user/PowerToolInstitute

              Comment


              • #8
                Re: Info Request - Simpson 255 VOM

                What's the advantage over this meter vs a fluke equivilant?
                Buy cheap, buy twice.

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                • #9
                  Re: Info Request - Simpson 255 VOM

                  Originally posted by Bob D. View Post
                  Thanks for taking the time to create that site Paul, very nice and helpful.

                  Bob, N2IPH
                  Thanks Bob and Woussko for the kind words.

                  Bob, you may be interested in my other site: http://bkportables.com
                  Like Simpson260.com, there is no fancy HTML - PHP or flash crap. No ads or banners popping up. Just free information.

                  I started both sites, 'cause everyone likes free manual copies.

                  Paul

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