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 636911 times)

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Offline joeqsmith

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 :-DD  Yea, sorry about that.  I know my videos tend to be dry and my monotone voice can put you to sleep.   So I won't blame you your not following along real close.   

I am currently playing with my first ever Keysight handheld meter.  Planning on a two part video like the last few.   More of a review.   

Maybe Keysight with it's fancy gas discharge tubes will dethrone the Flukes...   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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I am amazed how susceptible some of the handheld meters are to RF.   You would think they would be stable with a 10v/m h/v gigish.   Somehow I doubt it. 

Funny, I have never had the need to put a meter in a chamber.  Any of you ever look into this? 

Almost forgot, the first half of my Keysight meter review is uploading now for those of you interested in a little GDT action.  So stay tuned....

« Last Edit: January 27, 2016, 04:12:52 am by joeqsmith »
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Part 1 of the Keysight U1231A.  I have not yet ran any of the surge transients yet and am hoping to get to it this weekend.   


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

Offline joeqsmith

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That was quick.   :box:
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline Lightages

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Offline joeqsmith

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That was quick.   :box:

 :-//

From above:
Quote
I have not yet ran any of the surge transients yet and am hoping to get to it this weekend.   
The weekend is here.  Can I interest you in a slightly used Keysight meter?
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Keysight's gas discharge tubes in action. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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As a side note, I downloaded the datasheet for the controller IC and then tacked a couple of leads to the supply pins.   The device will pull about 60ma (should be below 5) and will begin to heat up.    All those surrounding parts could not save it. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Keysight meter is ran on the half cycle line simulator.   

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

Offline Muttley Snickers

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Well that's a shame Joe, I really did like the look, form factor and feature set of these meters and if the other meter that is currently very popular wasn't out yet then I was looking to grab a few of the U1232A's whilst Keysight still had the bonus deal in place, I would imagine that a warranty claim is out of the question but you never know until you try.

Thank you for your fine efforts...... :-+


Muttley
 

Offline joeqsmith

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If the meters do what you want, I see no reason not to get them just because of the results from this test.   I was not at all surprised this Keysight meter was damaged beyond repair and was actually expecting it was going to fail at a much lower level.   Seeing that switch breakdown shows just how slow those things are to turn on.   It wouldn't have taken much to harden that design but seems that is always the story.   

I have yet to try to get any of the meters that have failed repaired under warranty.  Imagine the poor service tech.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Online Fungus

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If the meters do what you want, I see no reason not to get them just because of the results from this test.

Yep.

eg. The UT61E has a very capable 22000 count chipset and plenty of features. It's a very good meter for the price from a capability point of view. It even does data logging via serial cable.

It failed Joe's first test but there's no reason not to get one if you're a hobbyist who mostly works with low voltage DC stuff.

PS: You can get a UT61E and a super-robust Fluke 101 for less than $100. Two meters is always better than one and that's a very capable combination. It covers just about everything you'll ever need a multimeter for. If I was just starting out and had $100 to spend I could do a lot worse than buy those two.

« Last Edit: February 02, 2016, 12:15:24 pm by Fungus »
 

Offline joeqsmith

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It's too dry here to own a 61D or E.   Would hate to have a meter fail because I walked across the carpet without my wrist strap on and touch the leads.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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I picked up a UNI-T UT210E clamp meter.   I had read some of the reviews on this site for it and a friend on mine was looking for a clamp so I thought we could check it out.   A few of us played with it today (just for the AC/DC current) and it's actually not a bad little clamp for the price.  More accurate than I was expecting.   
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Online Fungus

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It's too dry here to own a 61D or E.   Would hate to have a meter fail because I walked across the carpet without my wrist strap on and touch the leads.

In that case you leave the 61E on your bench (which must be grounded or you wouldn't be able to do anything) and you only carry the Fluke 101 around the house. :-)

 

Offline joeqsmith

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It's too dry here to own a 61D or E.   Would hate to have a meter fail because I walked across the carpet without my wrist strap on and touch the leads.

In that case you leave the 61E on your bench (which must be grounded or you wouldn't be able to do anything) and you only carry the Fluke 101 around the house. :-)

I will be the first to admit at home I rarely practice proper ESD handling.  I actually only have a couple of square feet of grounded mat on my bench where I solder and it's rare I use a strap.  As bad as it sounds, I would guess many hobbyist do not use anything for ESD.       
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Looking at the current inputs on a couple of meters. 

https://www.youtube.com/watch?v=_x9yV2ah4fg&feature=youtu.be
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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It turns out there was not a second spark gap as I stated in the video.  Well, there was but I doubt it was an intended one.   The trace that routed to the current input was gone to about half way up the board.   I suspect this is when the control IC lost it's lid. 

In gap2, you can see how the arc jumped all the way to the common pads and started to erode them.   This is a fairly wide gap compared to what I am suspecting is an actual spark gap in gap1.   







« Last Edit: February 08, 2016, 02:08:50 am by joeqsmith »
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Just because a meter uses a large fuse in the current does not mean that the layout is any better.   

« Last Edit: February 08, 2016, 02:09:13 am by joeqsmith »
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline crispy_tofu

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The images don't seem to work...  :-[
 

Offline joeqsmith

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The images don't seem to work...  :-[

For some reason, when I pull from the camera directly it does not always copy. :-//    Fixed.

Here is the Fluke 17B+.   Note that they use an inner plane. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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From another one of Danaher's divisions, 5ky's AM530.   Nice slit for the mA range and again, a fair amount of clearance. 
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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I was looking at Dave's video with Doug Ford where they put the Fluke 28II on Doug's generator.   At the start of the video Doug states:  4.2-4.3KV, <1ms discharge and 400J for the small generator.    I suspect this would be a fair bit different as he talks about charging the cap.    It appears they ran it with the selector in DC mode.   

My setup only puts at most in the 20J range at under 6KV.  Even when I test with the old generator at higher voltages, the generator is below 20J.  The pulse on the low voltage generator can be as wide as 100us FWHH and up to 50us on the high voltage generator.    This is why I never see the level of damage shown in Dave and Doug's video.   

Dave talks about the meter failing safe and is what he would expect.   I would assume the resistor shown lifted was in place or the MOVs would not have cut loose.    Based on how poorly the 87Vs I looked at performed, it makes sense to me that the 28II would see a fair amount of damage.   It would have been interesting to see the Fluke 101, 107, 17B+ and 115 on this same generator and then compare the results with the 28II.   

https://www.youtube.com/watch?feature=player_detailpage&v=M-FZP1U2dkM#t=653
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Offline joeqsmith

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Two new meters are on order.   Maybe in a week or so I'll have something to show....
How electrically robust is your meter?? https://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 

Online Fungus

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 :palm:

What meter is that?

 


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