Re: Fluke 289 bad supercapacitor replacement repair
maybe you could do the upgrade to a lithium rechargeable and a current limit resistor?
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Re: Fluke 289 bad supercapacitor replacement repair
Did anyone’s replacement cap fail again? Charged up the batteries (takes roughly 2hrs)in my 289 and had to input date and time again. Ugh!Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
I see- as an extra seal to protect against future leaks. I'm not sure what the acid is, as silicone sealant dissolves in sulfuric acid and puffs up in nitric and acetic acid. Larger supercaps can take a piss on a PC board. If the cap had a housing or was potted maybe.Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
For Fluke 289 jack-detect DS2, any top-emitting 0805 IR LED will work, just not too high to hit jack diffuser when you assemble everything.
Original is mentioned as OSRAM SFH 325 FA-3/4-Z series, peaking at 980nm. One guy used 940nm Harvatek HT-170IRAJ works fine.Attached FilesLeave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
The supercap electrolyte is acidic and it eventually corrodes through the case and causes a lot of damage. Putting RTV over that, uh just a mess for a few dollar part in an expensive multimeter.Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Is the electrolyte leak causing damage to other components?
Anyway, probably the same answer as whether to use RTV on a regular electrolytic capacitor to prevent leaks, though a supercapacitor does not need to deal with ESR as much if it's just needed to maintain static RAM state.
In other words, it leaks because it's under pressure...Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
i wonder if putting RTV on the cap would contain it, or if the leak is under pressure??Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Check for contamination inside the jacks for the cables.
If memory serves me right there is an optical sensor there.
So if there is dirt in the ampere jack it will cause this message...Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
HELLO boys!
I need your help. :'( :'( :'(
I have the tester 289 that as I turn on gives me an "incorrectly connected cables."
Could it be the super capacitor?
it is damaged. the fluke is 289 and of the year 2008.
I found on ebay a PANASONIC GOLDCAP KONDENSATOR Capacitor 0,22F 3,6V 10x5MM[/img].
You can help me?
Thank you.Attached FilesLeave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Beware you are about to see Fluke porn!
I had to take the 289 apart again to make pictures. On a side note: The supercap held the memory for the entire time I had it apart again. So I am happy!Attached FilesLeave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Nice! But you're supposed to post pictures to make us happy
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Re: Fluke 289 bad supercapacitor replacement repair
Got the supercap today, it fits perfect, and the meters are back in business as they suppsed to be.
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Re: Fluke 289 bad supercapacitor replacement repair
Yes. See
https://www.eevblog.com/forum/testge...unt-coin-cell/Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
didnt they fuck around over this?
i seem to remember a long thread at eevblog about it.Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Keep in mind these meters have a minimum of 10 years warranty.
So if anyone is not up to replacing them just send it in to Fluke to have them do it...
https://www.fluke.com/en-gb/support/warrantiesLeave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
Unfortunately yes. Which sucks big time, because they aren't really a "cheap" DMM either. I am fortunate, that both caps were not leaking to the board yet making a mess. I suggest strongly to anyone that has a Fluke 287 / 289 to do this test and replace that cap before it is too late. Different revision boards, have different style of supercaps in it too. Also the 189 is affected, but not the 187 series.Leave a comment:
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Re: Fluke 289 bad supercapacitor replacement repair
many meters have been fucked by that cap leaking!Leave a comment:
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