[volt-nuts] Fluke 8840A 100 and 1000 VDC ranges read low.

[John Phillips]

Thank you...


On Tue, Mar 13, 2012 at 8:27 AM, Rob Klein <rob.klein at smalldesign.nl> wrote:

> John,
>
> I do not know what these "instructions" you have are, but the 8840A manual
> (http://assets.fluke.com/**manuals/8840A___imeng0300.pdf<http://assets.fluke.com/manuals/8840A___imeng0300.pdf>
> )**, pp. 112 - 114, describes
> the calibration procedure in some detail. And yes, that includes the 200V
> and 1000V
> ranges.
>
> - Rob.
>
> Op 12-3-2012 23:13, John Phillips schreef:
>
>  Hi,
>> I have calibrated several Fluke 8840A DMM but have never seen one that
>> needed the 100 or the 1000 VDC range calibrated. The instructions I have
>> do
>> not say anything about calibration constants for these ranges.
>> I have changed the 100X voltage devider but that did not help.
>> 10 VDC reads 9.9997
>> 10 VDC on the 100 scale reads 9.985
>> 100 VDC reads 99.915 on 100 scale and 99.81 on the 1000 scale.
>> 1 VDC on the 10 scale reads 0.9999
>> The 100 to 1 dividers are about 99.995 and 99.997 to one. The 99.997
>> divider is in the unit now.
>>
>> What did I not do to get this to work. There must be a step someplace to
>> do
>> a math cal on the 100 to 1 divider.
>> Thanks you...
>> .
>>
>
>
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-- 
John Phillips