fluke 87 offset -3V in V

Gunther76 · 4th February 2011, 05:42 PM

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

Steerpike · 4th February 2011, 10:23 PM

Quote:

Originally Posted by Gunther76

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?

Gunther76 · 5th February 2011, 05:53 AM

Yes,i tried a new battery but it makes no difference.

bob91343 · 5th February 2011, 06:52 AM

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.

Gunther76 · 7th February 2011, 06:16 AM

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.

peranders · 7th February 2011, 06:50 AM

Do you have -3 V in every DC voltage range? Does it work besides that? 12 V = 9 V?

Gunther76 · 7th February 2011, 07:07 AM

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

tunneldiode · 7th February 2011, 02:43 PM

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.

Gunther76 · 8th February 2011, 08:26 AM

No I don’t have that service manual, do you have the link I can’t find it on the website?
Thanks,

tunneldiode · 8th February 2011, 12:23 PM

Try this:
Download information

4th February 2011, 05:42 PM	#1
Gunther76 diyAudio Member Join Date: Feb 2011	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

7th February 2011, 06:50 AM	#6
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Do you have -3 V in every DC voltage range? Does it work besides that? 12 V = 9 V? __________________ /Per-Anders (my first name) or P-A as my friends call me

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5th February 2011, 05:53 AM	#3
Gunther76 diyAudio Member Join Date: Feb 2011	Yes,i tried a new battery but it makes no difference.

5th February 2011, 06:52 AM	#4
bob91343 diyAudio Member Join Date: Mar 2010	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.

7th February 2011, 06:16 AM	#5
Gunther76 diyAudio Member Join Date: Feb 2011	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.

7th February 2011, 07:07 AM	#7
Gunther76 diyAudio Member Join Date: Feb 2011	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

7th February 2011, 02:43 PM	#8
tunneldiode diyAudio Member Join Date: Jan 2011	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.

8th February 2011, 08:26 AM	#9
Gunther76 diyAudio Member Join Date: Feb 2011	No I don’t have that service manual, do you have the link I can’t find it on the website? Thanks,

8th February 2011, 12:23 PM	#10
tunneldiode diyAudio Member Join Date: Jan 2011	Try this: Download information

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