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Products => Test Equipment => Topic started by: SharpEars on September 20, 2015, 02:45:51 am

Title: Fluke 8842A getting rid of a small current offset (-30 uA)
Post by: SharpEars on September 20, 2015, 02:45:51 am
Is it possible on the Fluke 8842A multimeter to get rid of a small current offset (say about 30 microamperes or so)? This appears when the unit is fully warmed up and in current measurement mode and there is nothing attached to it. I was looking through the manual and short of going through the entire calibration procedure for all functions, I see no way to get rid of a fairly small current offset (i.e., to zero out the reading when there is no current flowing through the instrument).

If anyone has any thoughts or knows of a way to do this, please help me out.
Title: Re: Fluke 8842A getting rid of a small current offset (-30 uA)
Post by: TiN on September 20, 2015, 03:09:58 am
Just use math REL function to null readout?
Title: Re: Fluke 8842A getting rid of a small current offset (-30 uA)
Post by: deadlylover on September 20, 2015, 03:13:20 am
Does pressing the offset button work?
Title: Re: Fluke 8842A getting rid of a small current offset (-30 uA)
Post by: mtdoc on September 20, 2015, 04:02:11 am
Yep, that's exactly what the OFFSET button does.  See section 2-29 in the manual "Offset Measurements".
Title: Re: Fluke 8842A getting rid of a small current offset (-30 uA)
Post by: SharpEars on September 20, 2015, 02:27:46 pm
Does pressing the offset button work?

Yep, that's exactly what the OFFSET button does.  See section 2-29 in the manual "Offset Measurements".

I must have been blind, the Offset button did the trick! I guess I was looking for a Zero button and tried to search for zero/zeroing in the manual, as it is called on my other DVMs. Apparently, the word offset didn't click in my head as "compensating for an existing offset."