Poll

Are you interested in seeing more handheld meters tested?

This testing is pointless! Please STOP damaging these meters!
3 (6.4%)
 Yes, I would like to more meters tested.
44 (93.6%)

Total Members Voted: 47

Author Topic: Handheld meter robustness testing  (Read 633535 times)

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Online AVGresponding

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Re: Handheld meter robustness testing
« Reply #3750 on: July 18, 2020, 09:21:38 am »
This is for that ave agv ?? guy who was blabbing about safety all the while showing his hardware fuse installed.  Too stupid to buy the right one.  Worse, people watch this stuff and may actually believe the guy knows what he's doing.

Are you referring to AvE?
nuqDaq yuch Dapol?
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3751 on: July 18, 2020, 03:30:38 pm »
This is for that ave agv ?? guy who was blabbing about safety all the while showing his hardware fuse installed.  Too stupid to buy the right one.  Worse, people watch this stuff and may actually believe the guy knows what he's doing.

Are you referring to AvE?

Yeah, that's the guy.   I used that example in one of my videos where I zoomed in to show the part number and I think I went over the datasheet for it.   If you are going to talk about safety,   at least have the common sense to order the correct fuse for the meter after you blow one out.

****
I looked for their original video and was unable to find it.   As I said, I had used that part in another video I made which can be seen here:

https://youtu.be/nXjVc4Rmg7Y?t=3104

****
See attached screen captures taken from their original video.   
« Last Edit: July 18, 2020, 05:42:50 pm by joeqsmith »
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline rsjsouza

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Re: Handheld meter robustness testing
« Reply #3752 on: July 18, 2020, 04:24:41 pm »
Joe, good video from Fluke. I'll watch it later.
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3753 on: July 18, 2020, 05:48:01 pm »
Joe, good video from Fluke. I'll watch it later.

Looks like they want you to provide them with your information to watch their safety course.  If you decide to watch this series, I'm interested in hearing what your take is on it. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3754 on: July 30, 2020, 11:38:52 pm »
I pulled this old junk meter from the trash bin.  It's missing the case.  The small glass filled fuse appears original.  The large fuse was missing.  I installed a smaller fuse to test it out and it appears 100% functional.    Shown at 10V, 1V and 1.0mV.

The board is marked
Fluke 7x-3001
REV L
E-2 (hand written)
CAD 585
REV L

Main IC is marked
FLUKE O
683052
22 84
L 255


It uses spark gaps for the primary clamps.  I doubt it would hold up very well to my transient tests but it seems to have had a useful life.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3755 on: September 07, 2020, 11:55:50 pm »
Finally got around to running the Fluke 77 from the trash bin.   

How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3756 on: September 09, 2020, 01:22:47 am »
So far there have been a few suggestions on what to do with the meter before it heads back to trash bin.  One was life cycle the rotary switch.   If I had the case, I would have set this up.  Another was to run ESD tests on it.  My plan is to replace the damaged resistor and run that test.   Maybe then see if swapping out a few parts will allow the meter to survive to some higher levels.   Obviously, this is all dependent on if anything else was damaged, if it survives ESD, etc.   

So stay tuned for round II.   If you have anything you would like to see done with it, feel free to leave a comment.
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3757 on: September 10, 2020, 11:44:13 am »
Part II.  Enjoy.
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline bd139

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Re: Handheld meter robustness testing
« Reply #3758 on: September 10, 2020, 12:19:43 pm »
Interesting. I haven't watched Part II yet. The rotary switch is trouble on these older meters IMHO. I had a 77 for years (which was my father's before) which wore out eventually and caused problems. Also I got a Fluke 25 recently that the previous dum dum owner had blown up where the switch had actually melted and buckled.

Some graphic stupidity. Fuse go bang? Yeah it was supposed to. This is not the correct solution  :palm: :palm: :palm:



Ahh fuse replaced, now switch go bang. I've removed the top layer of wafer here to show the damage:



More  :palm: :palm: :palm:

Replacement analogue board were generously provided for the meter by another forum member and it lives but my word what a shit show.
 
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Online wolfy007

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Re: Handheld meter robustness testing
« Reply #3759 on: September 10, 2020, 12:47:11 pm »
Part II.  Enjoy.


I think I have a parts unit 77 (had a nasty battery leak), I think I may have stolen the fuses and the fusable resistor, but it has a case and other bits in case you want to get it going and test in a proper case.
 

Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3760 on: September 10, 2020, 11:45:23 pm »
I think I have a parts unit 77 (had a nasty battery leak), I think I may have stolen the fuses and the fusable resistor, but it has a case and other bits in case you want to get it going and test in a proper case.
Someone else (perhaps you) had extended a similar offer in the YT comments.   I appreciate the offer but I don't have any plans to revive it.  It's not a rare meter and not something I would have a need for.  If it were a 189, I would change my tune.   Then again, if it were a 189, it would have survived. 

The battery had leaked at one point with this meter as well.  It's odd to think of needing to split the case in order to gain access to the battery.  You can really tell this meter is old from some of their early design choices. 

They go on to develop the skills to later design and produce some very good products becoming a world leader to what we have today. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3761 on: September 10, 2020, 11:49:45 pm »
Interesting. I haven't watched Part II yet. The rotary switch is trouble on these older meters IMHO. I had a 77 for years (which was my father's before) which wore out eventually and caused problems.

I wouldn't be at all surprised to learn that the mechanical switch has a high failure rate.  Thinking back to when they were used in TV set tuners and how it was a constant battle to keep them working (no remotes or digital tuning).   It seems like Fluke mastered how to make a switch reliable on the PCB.  Same is true for Brymen.  After that, things get pretty dicey from the ones I have looked at.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Online wolfy007

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Re: Handheld meter robustness testing
« Reply #3762 on: September 11, 2020, 12:59:50 am »
I think I have a parts unit 77 (had a nasty battery leak), I think I may have stolen the fuses and the fusable resistor, but it has a case and other bits in case you want to get it going and test in a proper case.
Someone else (perhaps you) had extended a similar offer in the YT comments.   I appreciate the offer but I don't have any plans to revive it.  It's not a rare meter and not something I would have a need for.  If it were a 189, I would change my tune.   Then again, if it were a 189, it would have survived. 

The battery had leaked at one point with this meter as well.  It's odd to think of needing to split the case in order to gain access to the battery.  You can really tell this meter is old from some of their early design choices. 

They go on to develop the skills to later design and produce some very good products becoming a world leader to what we have today.

Honestly, looking at the 8060A, they almost went backwards with the 77, my guess is it was made to a price point. Though the 8060A doesnt have great input protection, its a great meter in most other respects, including having a battery/fuse access door...  ::)
 
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Offline joeqsmith

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Re: Handheld meter robustness testing
« Reply #3763 on: September 11, 2020, 01:30:10 am »
I think I have a parts unit 77 (had a nasty battery leak), I think I may have stolen the fuses and the fusable resistor, but it has a case and other bits in case you want to get it going and test in a proper case.
Someone else (perhaps you) had extended a similar offer in the YT comments.   I appreciate the offer but I don't have any plans to revive it.  It's not a rare meter and not something I would have a need for.  If it were a 189, I would change my tune.   Then again, if it were a 189, it would have survived. 

The battery had leaked at one point with this meter as well.  It's odd to think of needing to split the case in order to gain access to the battery.  You can really tell this meter is old from some of their early design choices. 

They go on to develop the skills to later design and produce some very good products becoming a world leader to what we have today.

Honestly, looking at the 8060A, they almost went backwards with the 77, my guess is it was made to a price point. Though the 8060A doesnt have great input protection, its a great meter in most other respects, including having a battery/fuse access door...  ::)

I wrote Fluke off after my first one and vowed to never own another.  It really wasn't until I started running these tests and beat the crap out of that 101  that I gained some respect for them and decided to have another look.   Outside of the odd 87V failure that I still don't understand and this old 77,  all of Flukes DMMs have done very well against my tests.   Today, outside of the Brymen BM869s, the only DMM I use on a regular basis is the Fluke 189.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Online EEVblog

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Re: Handheld meter robustness testing
« Reply #3764 on: September 12, 2020, 02:05:51 am »
I think I have a parts unit 77 (had a nasty battery leak), I think I may have stolen the fuses and the fusable resistor, but it has a case and other bits in case you want to get it going and test in a proper case.
Someone else (perhaps you) had extended a similar offer in the YT comments.   I appreciate the offer but I don't have any plans to revive it.  It's not a rare meter and not something I would have a need for.  If it were a 189, I would change my tune.   Then again, if it were a 189, it would have survived. 

The battery had leaked at one point with this meter as well.  It's odd to think of needing to split the case in order to gain access to the battery.  You can really tell this meter is old from some of their early design choices. 

They go on to develop the skills to later design and produce some very good products becoming a world leader to what we have today.
Honestly, looking at the 8060A, they almost went backwards with the 77, my guess is it was made to a price point.

No, just different markets. The 8060A was a lab grade electronics meter, the 70 series was designed for the field and electrical use.
 
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