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Old 4th February 2011, 05:42 PM   #1
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Default fluke 87 offset -3V in V

Hello,
I have a fluke 87 and when i set the fluke on Vdc i get an offset from -3V.
There is no problem on other settings.

Does someone now how i can repair this?

Thanks,
Gunther
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Old 4th February 2011, 10:23 PM   #2
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Quote:
Originally Posted by Gunther76 View Post
Hello,
I have a fluke 87 and when i set the fluke on Vdc i get an offset from -3V.
There is no problem on other settings.
Before anything else, have you tried a new, good battery?
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Old 5th February 2011, 05:53 AM   #3
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Yes,i tried a new battery but it makes no difference.
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Old 5th February 2011, 06:52 AM   #4
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Some of those meters allow offset and perhaps yours does and needs resetting.

When in doubt, take a two step approach. 1. Read the manual. 2. Call Fluke on their toll free number.
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Old 7th February 2011, 06:16 AM   #5
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I have the manual but there is nothing in the manual to set the offset,I can set it to OV before measuring but I have to do this every time I use the fluke and the autoranging won't work when I do this.
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Old 7th February 2011, 06:50 AM   #6
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Do you have -3 V in every DC voltage range? Does it work besides that? 12 V = 9 V?
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Old 7th February 2011, 07:07 AM   #7
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In every DC voltage range (except for the mV but this is an other selection on the fluke)
Yes the reading is correct 12V gives 9V
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Old 7th February 2011, 02:43 PM   #8
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There is a 10-page service manual as a free download on Fluke's website, have you got it?
A common problem is a 1K fusible resistor opens when stressed (i.e. overvoltage, etc.) worth checking.
The meter uses a 3V rail.
It may be that a component in this area is o/c.
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Old 8th February 2011, 08:26 AM   #9
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No I don’t have that service manual, do you have the link I can’t find it on the website?
Thanks,
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Old 8th February 2011, 12:23 PM   #10
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Try this:
Download information
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