What are 6.5 Digit Multimeters Good For?
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From: D from BC on 11 Mar 2010 20:56 6.5 digit multimeters sell around $1000.00. For electronics development, are these $1000 multimeters really necessary? What are they good for?
From: John Larkin on 11 Mar 2010 21:23 On Thu, 11 Mar 2010 17:56:35 -0800, D from BC <myrealaddress(a)comic.com> wrote: >6.5 digit multimeters sell around $1000.00. >For electronics development, are these $1000 multimeters really >necessary? >What are they good for? Measuring to PPM accuracy, and measuring microvolt-level voltages. And as a traceable standard for calibrating products. The Fluke 8845A is excellent. John
From: Jon Slaughter on 11 Mar 2010 21:33 John Larkin wrote: > On Thu, 11 Mar 2010 17:56:35 -0800, D from BC > <myrealaddress(a)comic.com> wrote: > >> 6.5 digit multimeters sell around $1000.00. >> For electronics development, are these $1000 multimeters really >> necessary? >> What are they good for? > > Measuring to PPM accuracy, and measuring microvolt-level voltages. And > as a traceable standard for calibrating products. > > The Fluke 8845A is excellent. > > John What's the big deal? Can't they just switch to 24-bit ADC's on the cheap and get the accuracy? Or is there some special techniques required to get that resolution in practice?
From: Jon Kirwan on 11 Mar 2010 21:49 On Thu, 11 Mar 2010 20:33:16 -0600, "Jon Slaughter" <Jon_Slaughter(a)Hotmail.com> wrote: >John Larkin wrote: >> On Thu, 11 Mar 2010 17:56:35 -0800, D from BC >> <myrealaddress(a)comic.com> wrote: >> >>> 6.5 digit multimeters sell around $1000.00. >>> For electronics development, are these $1000 multimeters really >>> necessary? >>> What are they good for? >> >> Measuring to PPM accuracy, and measuring microvolt-level voltages. And >> as a traceable standard for calibrating products. >> >> The Fluke 8845A is excellent. >> >> John > >What's the big deal? Can't they just switch to 24-bit ADC's on the cheap and >get the accuracy? Or is there some special techniques required to get that >resolution in practice? Measurement precision and accuracy aren't the same. You mix "resolution," "accuracy," and "24-bit" in the same breath. Jon
From: D from BC on 11 Mar 2010 21:53
In article <a69jp59q5nvmomn6rqobm4q4a3m0a4088k(a)4ax.com>, jjlarkin(a)highNOTlandTHIStechnologyPART.com says... > > On Thu, 11 Mar 2010 17:56:35 -0800, D from BC > <myrealaddress(a)comic.com> wrote: > > >6.5 digit multimeters sell around $1000.00. > >For electronics development, are these $1000 multimeters really > >necessary? > >What are they good for? > > Measuring to PPM accuracy, and measuring microvolt-level voltages. And > as a traceable standard for calibrating products. > > The Fluke 8845A is excellent. > > John Ah.. the tool that sets the tools. Of course there's always something better.. :P 8.5 Digit multimeter http://www.home.agilent.com/agilent/product.jspx?nid=- 536902435.536881781.00&cc=US&lc=eng |