What are 6.5 Digit Multimeters Good For?
in [Design]
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From: Archimedes' Lever on 13 Mar 2010 12:42 On Sat, 13 Mar 2010 13:27:35 GMT, Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >On a sunny day (Fri, 12 Mar 2010 13:00:04 -0800) it happened D from BC ><myrealaddress(a)comic.com> wrote in <MPG.26044b27299d843e9896f7(a)209.197.12.12>: > >>In article <hne8fg$uqm$1(a)news.albasani.net>, pNaonStpealmtje(a)yahoo.com >>says... >>> >>> On a sunny day (Fri, 12 Mar 2010 10:50:48 -0600) it happened John Fields >>> <jfields(a)austininstruments.com> wrote in >>> <ekrkp5lg8obtcmftn2tmq8adsnlte9u59e(a)4ax.com>: >>> >>> >On Fri, 12 Mar 2010 12:30:31 GMT, Jan Panteltje >>> ><pNaonStpealmtje(a)yahoo.com> wrote: >>> > >>> >>On a sunny day (Thu, 11 Mar 2010 17:56:35 -0800) it happened D from BC >>> >><myrealaddress(a)comic.com> wrote in <MPG.26033f321480b139896e5(a)209.197.12.12>: >>> >> >>> >>>6.5 digit multimeters sell around $1000.00. >>> >>>For electronics development, are these $1000 multimeters really >>> >>>necessary? >>> >>>What are they good for? >>> >> >>> >>They are not needed, all you need is a 5 Euro multimeter, >>> >>and in extreme cases a precise reference. >>> >>That means if you use one of those reference chips, you borrow >>> >>the very accurate multimeter for a day, measure your reference chip, >>> >>write it down, and use that to calibrate your cheap multimeter, >>> >>or o compute it's real value, >>> >>Saved: 1000$ >>> > >>> >--- >>> >If you don't _need_ the accurate multimeter, then how do you get around >>> >the fact that unless you use _it_ to measure the reference, your cheap >>> >multimeter is pretty much a boat anchor? >>> > >>> > >>> >JF >>> >>> Sorry can you explain that again in electronics English? >> >>He means you still need an accurate tool to make use of a less accurate >>tool. Which raises the question, why have the less accurate tool? >> >>btw... Boat anchor is a term I sometimes use for large heavy antiqued >>test equipment. >>Pre LCD scopes are boat anchors. > >Yes, OK, but Fields did not read very well, >you only need the accurate one ONCE. >And that means you can go to a place and have yor reference measured. You're an idiot.
From: Mike Harrison on 13 Mar 2010 14:05 >>CRT + linear transformer + steel chassis = boat anchor. But quiet (electrically) >>LCD + smps + plastic box = not boat anchor +LCD backlight inverter = many noise sources.
From: Jim Yanik on 13 Mar 2010 16:45 Mike Harrison <mike(a)whitewing.co.uk> wrote in news:neonp5hq8cqen9nc6i721c9v55q5gg2of8(a)4ax.com: > >>>CRT + linear transformer + steel chassis = boat anchor. > > But quiet (electrically) > >>>LCD + smps + plastic box = not boat anchor > > +LCD backlight inverter = many noise sources. > and dies a lot faster than the older scopes. -- Jim Yanik jyanik at localnet dot com
From: Jan Panteltje on 13 Mar 2010 19:34 On a sunny day (Sat, 13 Mar 2010 08:25:30 -0600) it happened John Fields <jfields(a)austininstruments.com> wrote in <9r7np5l0ouml00fj82aq7ftuajjmgprsri(a)4ax.com>: >On Sat, 13 Mar 2010 13:23:56 GMT, Jan Panteltje ><pNaonStpealmtje(a)yahoo.com> wrote: > >>On a sunny day (Fri, 12 Mar 2010 15:31:33 -0600) it happened John Fields >><jfields(a)austininstruments.com> wrote in >><a3blp59kk10s93orbunu7mg8s921d1t56f(a)4ax.com>: >> >>>On Fri, 12 Mar 2010 20:33:42 GMT, Jan Panteltje >>><pNaonStpealmtje(a)yahoo.com> wrote: >>> >>>>On a sunny day (Fri, 12 Mar 2010 10:50:48 -0600) it happened John Fields >>>><jfields(a)austininstruments.com> wrote in >>>><ekrkp5lg8obtcmftn2tmq8adsnlte9u59e(a)4ax.com>: >>>> >>>>>On Fri, 12 Mar 2010 12:30:31 GMT, Jan Panteltje >>>>><pNaonStpealmtje(a)yahoo.com> wrote: >>>>> >>>>>>On a sunny day (Thu, 11 Mar 2010 17:56:35 -0800) it happened D from BC >>>>>><myrealaddress(a)comic.com> wrote in <MPG.26033f321480b139896e5(a)209.197.12.12>: >>>>>> >>>>>>>6.5 digit multimeters sell around $1000.00. >>>>>>>For electronics development, are these $1000 multimeters really >>>>>>>necessary? >>>>>>>What are they good for? >>>>>> >>>>>>They are not needed, all you need is a 5 Euro multimeter, >>>>>>and in extreme cases a precise reference. >>>>>>That means if you use one of those reference chips, you borrow >>>>>>the very accurate multimeter for a day, measure your reference chip, >>>>>>write it down, and use that to calibrate your cheap multimeter, >>>>>>or o compute it's real value, >>>>>>Saved: 1000$ >>>>> >>>>>--- >>>>>If you don't _need_ the accurate multimeter, then how do you get around >>>>>the fact that unless you use _it_ to measure the reference, your cheap >>>>>multimeter is pretty much a boat anchor? >>>>> >>>>> >>>>>JF >>>> >>>>Sorry can you explain that again in electronics English? >>> >>>--- >>>If you can't understand it in plain English, what makes you think you'll >>>be any less confused in "electronics English", whatever that may be? >>> >>>The point I was making was that your statement that 6.5 digit >>>multimeters aren't needed is wrong, since without one you wouldn't be >>>able to determine the accuracy of the cheap multimeter. >>> >>> >>>JF >> >>I know a guy who was actually a technican, he started studying philoosphy. >>He showed mw one of his books. >>To make a long story short: Philosophy is not for me. > >--- >The book had an ugly cover? Do not remember the cover, not interesting, but some of the statements in it were interesting, but indicated your state of mind in some aspects, so that is why I thought I should mention it, stay clear of it :-)
From: Jan Panteltje on 13 Mar 2010 19:36
On a sunny day (Sat, 13 Mar 2010 08:13:20 -0600) it happened John Fields <jfields(a)austininstruments.com> wrote in <l37np519aum4a3r6n9aetaona9ij7hesm7(a)4ax.com>: >On Sat, 13 Mar 2010 13:27:35 GMT, Jan Panteltje ><pNaonStpealmtje(a)yahoo.com> wrote: > >>On a sunny day (Fri, 12 Mar 2010 13:00:04 -0800) it happened D from BC >><myrealaddress(a)comic.com> wrote in <MPG.26044b27299d843e9896f7(a)209.197.12.12>: >> >>>In article <hne8fg$uqm$1(a)news.albasani.net>, pNaonStpealmtje(a)yahoo.com >>>says... >>>> >>>> On a sunny day (Fri, 12 Mar 2010 10:50:48 -0600) it happened John Fields >>>> <jfields(a)austininstruments.com> wrote in >>>> <ekrkp5lg8obtcmftn2tmq8adsnlte9u59e(a)4ax.com>: >>>> >>>> >On Fri, 12 Mar 2010 12:30:31 GMT, Jan Panteltje >>>> ><pNaonStpealmtje(a)yahoo.com> wrote: >>>> > >>>> >>On a sunny day (Thu, 11 Mar 2010 17:56:35 -0800) it happened D from BC >>>> >><myrealaddress(a)comic.com> wrote in <MPG.26033f321480b139896e5(a)209.197.12.12>: >>>> >> >>>> >>>6.5 digit multimeters sell around $1000.00. >>>> >>>For electronics development, are these $1000 multimeters really >>>> >>>necessary? >>>> >>>What are they good for? >>>> >> >>>> >>They are not needed, all you need is a 5 Euro multimeter, >>>> >>and in extreme cases a precise reference. >>>> >>That means if you use one of those reference chips, you borrow >>>> >>the very accurate multimeter for a day, measure your reference chip, >>>> >>write it down, and use that to calibrate your cheap multimeter, >>>> >>or o compute it's real value, >>>> >>Saved: 1000$ >>>> > >>>> >--- >>>> >If you don't _need_ the accurate multimeter, then how do you get around >>>> >the fact that unless you use _it_ to measure the reference, your cheap >>>> >multimeter is pretty much a boat anchor? >>>> > >>>> > >>>> >JF >>>> >>>> Sorry can you explain that again in electronics English? >>> >>>He means you still need an accurate tool to make use of a less accurate >>>tool. Which raises the question, why have the less accurate tool? >>> >>>btw... Boat anchor is a term I sometimes use for large heavy antiqued >>>test equipment. >>>Pre LCD scopes are boat anchors. >> >>Yes, OK, but Fields did not read very well, >>you only need the accurate one ONCE. >>And that means you can go to a place and have yor reference measured. > >--- >You seem to be the one having trouble with the language since even if >it's used only once, you still _need_ the higher accuracy instrument in >order to determine the error in the lower accuracy one. > >JF No you do not, how do you think those instruments came about? In your theory nothing could ever be made. :-) |