EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Groucho2005 on August 26, 2020, 07:07:07 pm
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Here's my brand spanking new Keithley DMM6500 compared to my good old Fluke 187 (bought in 1999, Made in USA) which has never been calibrated in 21 years:
(https://i.postimg.cc/FsfRN5LQ/DSC-4194.jpg)
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What is the voltage reference inside the fluke?
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What is the voltage reference inside the fluke?
I don't know, I'll have to open it up (unless someone here knows which reference it uses).
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Looks to be ref43: https://www.eevblog.com/forum/testgear/fluke-187/ (https://www.eevblog.com/forum/testgear/fluke-187/)
PS on the other side, my $5 dt-182 was also spot-on and was never calibrated except on the factory. But it has a bit less counts :).
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REF43G
https://www.analog.com/media/en/technical-documentation/data-sheets/REF43.pdf (https://www.analog.com/media/en/technical-documentation/data-sheets/REF43.pdf)
Marco
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never been calibrated in 21 years:
It's a youngster. My Fluke 8060A is still good after 35 years.
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never been calibrated in 21 years:
It's a youngster. My Fluke 8060A is still good after 35 years.
Amazing. :)
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I love my 189's :)
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I like my 188 (something somewhere between a 187 and 189) very much and all the herd of oldies that are still spot on (meaning the standard deviation of the herd is little ;D).
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188 never existed ??
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188 never existed ??
True, my 187 has identity problems: It has all the functionality of a 189 although it still occupies a 187 housing. 188 felt appropriate... ^-^
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Oh you're the one who hacked a 187 into a 189 loll :-+
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never been calibrated in 21 years:
It's a youngster. My Fluke 8060A is still good after 35 years.
Amazing. :)
It's the nature of the beast, they're designed that way.
I bet people here still have cheap-ass 1980s Tandy multimeters that are in spec.
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I love my 189's :)
+1 , among the 87V, 287 and 189 I own, 189 gets used almost 90%.
(https://www.eevblog.com/forum/chat/show-your-multimeter!/?action=dlattach;attach=394899;image)
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Love mine as well. :-DMM
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Does owning a broken 189 count?
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Would love to own one.
As I told before in another post, I would gladly exchange my 289 by a 189.
But why do I worry really?
I'm super happy with my 87V and I don't pretend to sell it. I have a 289, although If I had the chance to exchange it for a 189 in the same condition as mine, pristine basically new I would probably without bat an eye do it. I have the 54II that I pretend to repair after the accident it had, but parts are hard to get by at normal prices and want to buy the 225C Scopemeter because I used one extensively while working in the telecom industry so I got a linking on it. That would basically be all my to do list before I'm to old to enjoy them.
in https://www.eevblog.com/forum/testgear/what-do-you-think-of-the-new-fluke-87-v-max/msg2782518/#msg2782518 (https://www.eevblog.com/forum/testgear/what-do-you-think-of-the-new-fluke-87-v-max/msg2782518/#msg2782518)
The 289 is great mind it, but for some reason with time I started to appreciate more the 189. And when I bought my 289 FVF kit it was the year it was launched as the new "Top of the Line" for Fluke, and Fluke AD in Portugal - AresAgante gave me to choose between the "old" 189 at a discount price or the "new" 289. Being young I choose the most blingy one instead of the workhorse.
Nowardays I kinda regret a little, but really a tiny bit. I can count with the fingers of one hand the times I used the TrendCapture functionality on the 289, most of the time is record and download to the PC, something that the 189 do.
But at the same time I like the big guy still (289). Probably because it was at the time one of my biggest purchases for someone who had started working not long time ago and had helped me to earn money and keep me sane in the bad times.
But whatever, enough rambling. I look like the old guys...
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c. 1985, I bought an 8060A, mostly for its deciBel capabilities. It was expensive, but well worth the weeks it took to save up for.
When that got stolen I replaced it with a 189. Corrosion hit the battery terminals a couple of years back, Fluke said no more repairs -- but at least had the parts for sale.
It's still my favorite meter. Sounds like I need to go through it and check for impending failures. Any pointers?
thanks...
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It's still my favorite meter. Sounds like I need to go through it and check for impending failures. Any pointers?
Measure the current draw when it's powered off, it should be about 70uA. If it's much more than that then the supercap is probably bad.
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You could check for any forms of contamination on the pcb as well, including from your hands.
I've moved to the new Ikea LADDA 2450mAH NiMH AA rechargeables this year for my Fluke 189s. I'm still evaluating them but so far so good, $9 for a 4 pack. Rechargeables make you lazy, easier to let it auto off than switch off.
Supercap drain on the one in front of me is 66.8uA.
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Supercap drain on the one in front of me is 66.8uA.
The cap itself shouldn't be draining anything.
The 60-70uA drain is from the internal real time clock.
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I seem to recall it being even lower with no supercap in circuit. Might have been the 289, can't remember.
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I have both the 189 and 289. There are advantages with the 289 but it's too slow to use and the display is hard to read. Too slow because it takes time for it to boost up also the autoranging in resistance measurement is too slow.