Question for old-timers re: Simpson meters
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From: Mark Zacharias on 14 Jan 2010 06:26 Hi, As some of the guys here know, I presently collect old analog multimeters. I recall a picture I saw several years ago of a "wall" of Simpson meters - maybe 50 or more, used to demonstrate reliability. They were all being pulsed with DC of perhaps 0.5 hz or so for years on end and none had failed. Anybody remember this and where can I get a JPG of this, and maybe a link to the info? I've tried Google images etc no luck. Mark Z.
From: Jim Yanik on 14 Jan 2010 09:18 "Mark Zacharias" <mark_zacharias(a)sbclobal.net> wrote in news:003beb0d$0$2118$c3e8da3(a)news.astraweb.com: > Hi, > > As some of the guys here know, I presently collect old analog > multimeters. > > I recall a picture I saw several years ago of a "wall" of Simpson > meters - maybe 50 or more, used to demonstrate reliability. They were > all being pulsed with DC of perhaps 0.5 hz or so for years on end and > none had failed. that's not surprising; the meter movements are very simple and sealed from contamination. there's not much to fail,especially if you're not transporting them. the batteries leaking or resistors going out of tolerance are the biggest problems with Simpson meters,aside from being dropped. > > Anybody remember this and where can I get a JPG of this, and maybe a > link to the info? > > I've tried Google images etc no luck. > > > Mark Z. > > -- Jim Yanik jyanik at localnet dot com
From: Wendell on 14 Jan 2010 12:53 On Jan 14, 8:18 am, Jim Yanik <jya...(a)abuse.gov> wrote: > "Mark Zacharias" <mark_zachar...(a)sbclobal.net> wrote innews:003beb0d$0$2118$c3e8da3(a)news.astraweb.com: > > > Hi, > > > As some of the guys here know, I presently collect old analog > > multimeters. > > > I recall a picture I saw several years ago of a "wall" of Simpson > > meters - maybe 50 or more, used to demonstrate reliability. They were > > all being pulsed with DC of perhaps 0.5 hz or so for years on end and > > none had failed. > > that's not surprising; > the meter movements are very simple and sealed from contamination. > there's not much to fail,especially if you're not transporting them. > > the batteries leaking or resistors going out of tolerance are the biggest > problems with Simpson meters,aside from being dropped. > > > > > Anybody remember this and where can I get a JPG of this, and maybe a > > link to the info? > > > I've tried Google images etc no luck. > > > Mark Z. > > -- > Jim Yanik > jyanik > at > localnet > dot com You might check with the guy who runs simpson260.com Regards, Wendell
From: Mark Zacharias on 15 Jan 2010 07:48 "Jim Yanik" <jyanik(a)abuse.gov> wrote in message news:Xns9D005EBA3EB83jyaniklocalnetcom(a)216.168.3.44... > "Mark Zacharias" <mark_zacharias(a)sbclobal.net> wrote in > news:003beb0d$0$2118$c3e8da3(a)news.astraweb.com: > >> Hi, >> >> As some of the guys here know, I presently collect old analog >> multimeters. >> >> I recall a picture I saw several years ago of a "wall" of Simpson >> meters - maybe 50 or more, used to demonstrate reliability. They were >> all being pulsed with DC of perhaps 0.5 hz or so for years on end and >> none had failed. > > that's not surprising; > the meter movements are very simple and sealed from contamination. > there's not much to fail,especially if you're not transporting them. > > the batteries leaking or resistors going out of tolerance are the biggest > problems with Simpson meters,aside from being dropped. >> >> Anybody remember this and where can I get a JPG of this, and maybe a >> link to the info? >> >> I've tried Google images etc no luck. >> >> >> Mark Z. >> >> > > > > -- > Jim Yanik > jyanik > at > localnet > dot com Not surprising except perhaps considering mechanical issues - bearings, solder - to-coil connections, spring and/or taut-band failure, etc. As I recall, they were running this way for maybe over 20 years. They may have been naked meter movements and not complete VOM's. Like to have that picture, though... Mark Z.
From: Jim Yanik on 15 Jan 2010 08:31
"Mark Zacharias" <mark_zacharias(a)sbclobal.net> wrote in news:00c8f14f$0$1584$c3e8da3(a)news.astraweb.com: > "Jim Yanik" <jyanik(a)abuse.gov> wrote in message > news:Xns9D005EBA3EB83jyaniklocalnetcom(a)216.168.3.44... >> "Mark Zacharias" <mark_zacharias(a)sbclobal.net> wrote in >> news:003beb0d$0$2118$c3e8da3(a)news.astraweb.com: >> >>> Hi, >>> >>> As some of the guys here know, I presently collect old analog >>> multimeters. >>> >>> I recall a picture I saw several years ago of a "wall" of Simpson >>> meters - maybe 50 or more, used to demonstrate reliability. They >>> were all being pulsed with DC of perhaps 0.5 hz or so for years on >>> end and none had failed. >> >> that's not surprising; >> the meter movements are very simple and sealed from contamination. >> there's not much to fail,especially if you're not transporting them. >> >> the batteries leaking or resistors going out of tolerance are the >> biggest problems with Simpson meters,aside from being dropped. >>> >>> Anybody remember this and where can I get a JPG of this, and maybe a >>> link to the info? >>> >>> I've tried Google images etc no luck. >>> >>> >>> Mark Z. >>> >>> >> >> >> >> -- >> Jim Yanik >> jyanik >> at >> localnet >> dot com > > > Not surprising except perhaps considering mechanical issues - > bearings, solder - to-coil connections, spring and/or taut-band > failure, etc. As I recall, they were running this way for maybe over > 20 years. > > They may have been naked meter movements and not complete VOM's. > > Like to have that picture, though... > > Mark Z. > > those meters on the wall were likely left in one switch position and thus not any different than a "naked meter movement" with a resistor in series to measure voltage instead of current. BTW,I still have my Simpson 270-3 VOM. Works great. -- Jim Yanik jyanik at localnet dot com |