[volt-nuts] Fluke 895A

[Joseph Gray]

You can get two digits from the last dial scale. I didn't say I believed
them :-) In fact, given the age and history of this thing, I'm surprised
that even the first digit is believeable.

Joe Gray
W5JG



On Wed, Aug 14, 2013 at 12:43 AM, Charles Steinmetz
<csteinmetz at yandex.com>wrote:

> Joe wrote:
>
>  Just messing around, I measured a used 9 V battery. On the 100 uV scale
>> and with some interprolating of the last dial, I read 9.189795 V at null
>> (with a tiny bit of wobble on the needle).
>>
>
> Reading an 895A to 7 significant figures is a case of "false precision,"
> which can lead to overconfidence in the accuracy of measurement results.
>  Fluke specifies the accuracy of the 895A in differential mode as +/-
> (0.0025% of input + 0.0001% of range + 5 uV) at calibration temperature
> (around +/- 250 uV uncertainty for the measurement you describe), with
> calibration recommended every 30 days to maintain that accuracy.
>
> Best regards,
>
> Charles
>
>
>
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