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Test Equipment Anonymous (TEA) group therapy thread
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bd139:

--- Quote from: xrunner on July 07, 2022, 07:23:15 pm ---
--- Quote from: bd139 on July 07, 2022, 06:53:52 pm ---More cleaning … haven’t had a 465B this good yet. Hope the IC works  :-DD

--- End quote ---

Good job. I'm thinking about those knobs on the AC/DC/GND selector. I wish I had some to play with because I want to try a reconditioning idea with some modelling paints (not colored paint mind you ...). Might or might not work. Hmmm oh well if I ever got some I might do it.

--- End quote ---

Yeah those are slightly irritating. Dipping them in enamel might be an option  :-//
Zoli:

--- Quote from: AVGresponding on July 07, 2022, 07:26:39 pm ---...
You seem to think manufacturers never make mistakes.

FYI I just measured a collection of random diodes I manged to arrange to get a reading of 3.053V on the F87. I measured that voltage drop in parallel (quicker than making a whole new setup) with a Keithley 2015. It said 3.05242V. I don't even need to bother doing the maths, that's clearly well within the 2%+1 LSD spec, and well within the combined uncertainty of the meters.

I put it to you that the 3.000 figure in the manual is a typo, and should read 3.099V. Or perhaps they just felt 3.000V looked neater than 3.099V, such things have been known.

If they haven't bothered to correct the Hi Res firmware issue (afaik), why would they bother with a trivial typo?


EDIT: Incidentally, while the manual gives a figure of 0.6mA (typ) for diode test current, I measured mine as 0.78mA and change. That's 30% away from "typical". Make of that what you will.

--- End quote ---
Again, can you GUARANTEE that the readings what you've just done, stays within the specified limits for ALL specified conditions for ALL the manufactured DMM's(calibrated, OC)?
Because that's what the specification changes means.
And BTW, what is the required accuracy for "typical"? Old Trafford or playing field?
Anyway, I'm getting tired of this discussion, never mind you've barking at the wrong tree; I strongly recommend to contact Fluke, and continue the discussion with them, since they are responsible to the issues you've raised. 
mnementh:

--- Quote from: bd139 on July 07, 2022, 08:12:41 pm ---
--- Quote from: xrunner on July 07, 2022, 07:23:15 pm ---
--- Quote from: bd139 on July 07, 2022, 06:53:52 pm ---More cleaning … haven’t had a 465B this good yet. Hope the IC works  :-DD

--- End quote ---

Good job. I'm thinking about those knobs on the AC/DC/GND selector. I wish I had some to play with because I want to try a reconditioning idea with some modelling paints (not colored paint mind you ...). Might or might not work. Hmmm oh well if I ever got some I might do it.

--- End quote ---

Yeah those are slightly irritating. Dipping them in enamel might be an option  :-//
--- End quote ---

3DP.

mnem
You know you want to. >:D
bd139:

--- Quote from: mnementh on July 07, 2022, 09:10:14 pm ---
--- Quote from: bd139 on July 07, 2022, 08:12:41 pm ---
--- Quote from: xrunner on July 07, 2022, 07:23:15 pm ---
--- Quote from: bd139 on July 07, 2022, 06:53:52 pm ---More cleaning … haven’t had a 465B this good yet. Hope the IC works  :-DD

--- End quote ---

Good job. I'm thinking about those knobs on the AC/DC/GND selector. I wish I had some to play with because I want to try a reconditioning idea with some modelling paints (not colored paint mind you ...). Might or might not work. Hmmm oh well if I ever got some I might do it.

--- End quote ---

Yeah those are slightly irritating. Dipping them in enamel might be an option  :-//
--- End quote ---

3DP.

mnem
You know you want to. >:D

--- End quote ---

Is rather have inferior originals than inferior replacements  :-DD
AVGresponding:

--- Quote from: Zoli on July 07, 2022, 08:24:46 pm ---
Again, can you GUARANTEE that the readings what you've just done, stays within the specified limits for ALL specified conditions for ALL the manufactured DMM's(calibrated, OC)?
Because that's what the specification changes means.
--- End quote ---

Yes. It's not hard, the specified conditions are not unusual.


EDIT: Though I'm not going to put the time and effort into such a tedious task without some form of reward, ie a bet, ie, put your money where your mouth is.




--- Quote from: Zoli on July 07, 2022, 08:24:46 pm ---And BTW, what is the required accuracy for "typical"? Old Trafford or playing field?
--- End quote ---

More like "Manchester" by the looks of it.





--- Quote from: Zoli on July 07, 2022, 08:24:46 pm ---Anyway, I'm getting tired of this discussion, never mind you've barking at the wrong tree; I strongly recommend to contact Fluke, and continue the discussion with them, since they are responsible to the issues you've raised.

--- End quote ---

Yes, I've often noticed people get tired of discussions once they've backed themselves into a corner.

I may raise the matter with Fluke, though frankly I suspect they will not care.
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