FLUKE 87 MULTIMETER - NO VOLTAGE MEASUREMENT REPAIRED FIXED - SAVED FROM THE E-WASTE / RECYCLE BIN
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- Опубликовано: 26 сен 2020
- I plucked a donated Fluke 87 headed to E-Waste and repaired it with only 1 part at a cost of a few cents.
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Those resistor networks are designed to handle in excess of 1000V, you can probably buy a replacement, hey will be Caddock brand.
YOUR VIDEO IS MAGISTRAL I CONGRATULATE THANK YOU FOR SHARING YOUR KNOWLEDGE
Great video!
Glad to see you fixed 87 v I have one they were about 800 when new.
Excellent repair and another interesting case! Thanks a lot.
Very nice @NorCal715. A $400 meter repaired with a ten cent part. Fluke would have charged at least $100 for that repair. I have to replace $1000 circuit boards likely because of a ten cent part failure. I hate the fact that I don't have the brains to fix many circuit boards and have to bill my customers for board replacements.
Precision laser trimmed ceramic resistor arrays are not ten cents a pop.
Labor costs + precision resistor divider would probably legitimately add up to $100 lol. That resistor divider could possibly be the most expensive part on the board.
GREAT JOB STEVE
Thank you..
Nice job 👌👍
Ur always the best sir..
Nice job.
Thanks for this vedio
Thanks
Hopefully you will get a high voltage resistor, or at least 2 4M7 in series, with a lower value to adjust up the resistance, because otherwise you really should not subject that little 0.25W resistor to more than 125VAC as it might flash over.
I was thinking at first the input 1k resistor was open circuit, a common fault, but the ceramic divider is not a common thing to have fail, just guess it was dropped exactly the wrong way.
I don't plan on ever using this meter over 120vac so I think it will be fine. That thought had crossed my mind also. I had to try about 20 different values before I found one that was that accurate. The difference between .995m and 1.002m was a deal breaker. Maybe one day I will replace it with a couple of precision 5 megs or (4)2.5 megs thanks for watching.
Nice work! Looks like u know your job. I have a Fluke 15B (which i recently hacked to be sort of 17b), which has some continuity issue. One day after batt swich routine i had a leak, but nothing that serious (some corrosion on terminals meter itself + and in batt shell), but i wiped and brushed it clean, checked pcb solder pads and so on, all good. When i set it on beeper and short test leads i have ridiculous 380 ohm resistance, and while i'm holding leads together it started to drop, but sloooowly. I have a spare crocodile clamp probe, short it together and let them hang for a while. After a minute or so, i started to hear a beep, so does resistance drops to 78, started weak buzz and solid after a little while (i know a solid beep on 40 ohms according to calibration manual). After de-clamping and testing, everything become somewhat normal, and even after re-switching to other modes, but still over 40 ohms. /*EDIT - after turning meter off and back on after minute or two, issue starts again */. My original leads long gone, i am using relatively cheap ones, it does the job (uni-t's, but looks phony af)), it was like 1.5 ohm probe resistance or so, can't remember. I love my meter, it was a gift and really need to fix it normal again. I am a service engineer, so any advices, like replace smd elements, can be appreciated. Problem is, i don't have another multimeter to help me fix mine, and really scary to mess with it by myself, without some guidance. By the way, it's full of trimpots, may be cell leaks under one of them without any signs of cause, or maybe dry cap... no idea. Please help ^.^
I am sorry but I got lucky on the 87. I don't have a clue what may be causing the issue. Sorry.
@@norcal715 Nah, it's ok, i guess. Wish i have luck like u are. Anyway, mb someone faced this kind of issue might help. I just wondering %)
@@norcal715 I figured out what happened tomorrow. My guess about wrong current flow was right. Ok, so we have two batt terminals. Positive one, even though it looks completely alright, after de-soldering i notice it started to become....umm dunno how to say.... rotten solder pad, ha. I rework it with heating gun and solder pad was like a sponge, bubbling all the surface. Fluke quality of soldering components un-judgably good, but terminals - it has a blob on outer side, so it wasn't noticeable at first glance.
nice video
GOOD EVENING MASTER
THERE ARE NO LONGER SCHEMATICS OF FLUKE IT WOULD BE A GREAT HELP TO THE COMMUNITY OF REPAIR TECHNICIANS
Hi! Awesome video! I have a Fluke 324 clamp meter which I mistakenly connected to 230Vac while on continuity mode, and it now sometimes beeps weird to indicate continuity... I mean it doesn't make the normal beeping noise but rather a weird one.. any clues to what it might have wrong? I called Fluke but they told me that they wouldn't repair it and that I should buy a new one, which I can't afford.
Also great video! Thanks so much for sharing it with us!
Great video . What can cause a meter to read 36 volts on a 12 volt battery that gradually drops to 12 . New battery in meter .
Back in business
Hi! I ran into a broken fluke 87 that isn’t reading resistance or diode mode well. Diode is showing around 2v when not connected and ohm showing around 320. Any thoughts? I’ve check the input side and all checks out. I need to look into the diode voltage supply next. Thanks!
Great video,hope you don't mind me asking a question I have a fluke 117 love it to bits,but lately, the buzzer seem to be getting lower in volume, fresh battery and fuse,do you think my board is on its way out!thanks
Try and clean the contacts to the piezo beeper/element and see if anything changes. I dont think this has a all in one enclosed "speaker"
Thank you Sr For 1 more very detail video .Mr nor cal 715 I have a question for you. Am a little confused about how to use my pr-57 my question is do I need to disconnect the ground terminal on my pr-57 to be safe or do I have to use an adapter 3 to2. If am working on a device that have a 3 prongs cord on it? Again tank you for all your very good videos.
Disconnecting the ground from the output on this model isn't enough as the metal clip that holds the outlet in place bonds to the chassis (and ground). Probably easier to use a 3 to 2 prong adapter, especially if you want to ever use the leakage detection functionality.
Thank you very much Sr For Answering my question. And that's what am going to do use a 3 to 2 adapter on my pr-57 . am 100% sure that a lot of people will be very happy if you whit all your experience on electronics makes a video on safety about hot chassis ,grounds and osciloscope safety .thanks again Sr.
This DMM carries a lifetime warranty. You should have contacted Fluke about it.
I ALREADY SUBSCRIBED TO YOUR CHANNEL I DO NOT SPEAK ENGLISH I USE TRANSLATOR GREETINGS FROM VENEZUELA
My fluke III sleep for long and when I turn on. Screen shown all weird numbers on it. It goes on/off . Some time it turn on but when I try to test something, it's kind of reboot/ reset with screen blank.. what should I do?
What have you used to polish the contacts?
A very fine stainless steel toothbrush. Thanks for watching
I have a magnavox VCR recorder needing help with the tape loading to play. Can you help Niota Tennessee
email me Norcal715videos@gmail.com
I'm a bit confused, my Fluke 87 buss fuse DMM 44/ 100 and below the fuse on the board shows 1000V 100A fuse.
Please clarify if it's 400MA or 100Amps.
There is both an 11 amp fuse and a 400 ma fuse
hi, my fluke 87 multimeter is not woking retifire funcation please help out me.
Hello. please i am looking for lcd screen for fluke 87 do you know a site that sell it with other spare parts. Regards
Sorry no I do not.
Does anyone knows where I can purchase spare displays for Fluke 87V?
Not to be too pedantic, but where you said 1 or 2 percent a little past 8 minutes in, that would be 1 or 2 tenths of a percent. This would seem to be within, or at least on the edge, of the specification for that range which is +/- (0.05 % + 1).
How does a guy burn out a 10meg resistor?
Yeah,.maybe he dropped it
6 Amps for the battery???
Don't these have a lifetime warranty?
Not sure but I will look into it. Thanks!
PLEASE MAKE FLUKE AMPERIMETRIC CLIPS REPAIR VIDEOS. NO SCHEMATICS ARE GETTING IN GOOGLE
I have a fluke 87 stuck on .900V dc reading and its not reading any voltage also AC or also doesnt work in diode mode. I already changed the resistor anything else I should be looking at?
You are experienced rewiue give me bkprecision lcr meter 880
Wish somehow I could get 87V, I can't afford one, this model is like iPhone X for me, cause 289FVFIR3000 is the iPhone 12 Pro, please someone donate me 87V even if it's broken.
That battery has 6 amps? Wth
Ni-mh have very high current capabilities.
What sort of dimwit throws out a Fluke?
Industrial applications, if it quits .... get a new one.