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| Multimeters with (Color) Graphic Display - Summary & Comparison |
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| joeqsmith:
I added my votes to your poll. Based on all the tests I have ran Brymen and Fluke get a vote. I only looked at one each from HIOKI & Gossen. Both held up well. The Gossen was able to handle higher levels and is also the highest resolution meter I have looked at. However it is plagued with problems, so the third vote goes to HIOKI. The Keysight meter with it's glass filled detent spring gets zero votes. It wasn't very robust anyway. One day UNI-T will rise up and make the ultimate UT181B..... :popcorn: |
| Kean:
--- Quote from: joeqsmith on April 20, 2019, 01:54:34 pm ---I don't see very well. Could you please point out these additional protection devices. No doubt there will be some sort of high speed clamps in various sections. --- End quote --- I was referring to the 3rd photo in the 2nd post, and the blue SMD parts under the plastic shield which I thought may have been MOVs. But looking at the layout again now, I think these are just a HV resistor divider for the V input jack? https://www.eevblog.com/forum/testgear/metrix-mtx3293-quick-teardown/?action=dlattach;attach=284434;image --- Quote from: joeqsmith on April 20, 2019, 01:54:34 pm ---Without the larger parts in both legs, I can't see this thing holding up very well in the tests I run. The tape holding the plastic cover down will be fuel for the fire. It looks like ferrite under the pink heat shrink on the large ribbon. Can anyone confirm? --- End quote --- Also interesting is that the input jacks, input protection resistor, and PTC (which are all through hole), don't appear to use through hole solder joints. The board is well secured in the plastic frame with screws, but this would still concern me regarding reliability in field use (and your vibration tests). |
| sotos:
--- Quote from: joeqsmith on April 20, 2019, 02:03:17 pm --- --- Quote from: sotos on April 20, 2019, 06:05:53 am ---Can you name separately each datalogging save? in the UT181A. Fluke 289 cannot save a name as you wish, it saves them generally and when trying to get it back you must remember how it was saved. --- End quote --- You may be interested in page 58 of the manual. I have attached this page in case you are blocked from downloading it in your country. --- End quote --- Thank you. |
| joeqsmith:
--- Quote from: Kean on April 20, 2019, 03:39:23 pm --- --- Quote from: joeqsmith on April 20, 2019, 01:54:34 pm ---I don't see very well. Could you please point out these additional protection devices. No doubt there will be some sort of high speed clamps in various sections. --- End quote --- I was referring to the 3rd photo in the 2nd post, and the blue SMD parts under the plastic shield which I thought may have been MOVs. But looking at the layout again now, I think these are just a HV resistor divider for the V input jack? --- End quote --- Yes, I believe that these are resistors and not MOVs. I assume the one PTC and axial resistor are for the current source and mv input. So they may have just a basic low voltage clamp. However, these parts are always connected to the input so the low voltage clamp needs to be switched out. This means that the switch, relays, what ever is breaking that connection needs to handle the voltage off my generator for the meter to survive. Good luck with that!!! :-DD :-DD :box: The one thing that may save it is if it breaks down (unintentionally) at a lower voltage. The generator puts out so little energy, I've seen meters survive just from being shit designs without enough clearance or creepage. This will normally draw out the comments, "look, the $0.99 meter survived at 10KV!!!" :-DD --- Quote from: Kean on April 20, 2019, 03:39:23 pm ---https://www.eevblog.com/forum/testgear/metrix-mtx3293-quick-teardown/?action=dlattach;attach=284434;image --- Quote from: joeqsmith on April 20, 2019, 01:54:34 pm ---Without the larger parts in both legs, I can't see this thing holding up very well in the tests I run. The tape holding the plastic cover down will be fuel for the fire. It looks like ferrite under the pink heat shrink on the large ribbon. Can anyone confirm? --- End quote --- Also interesting is that the input jacks, input protection resistor, and PTC (which are all through hole), don't appear to use through hole solder joints. The board is well secured in the plastic frame with screws, but this would still concern me regarding reliability in field use (and your vibration tests). --- End quote --- I think the ribbon cables would be fun to watch with the vibration testing. :-DD The fuse holder didn't look all that impressive as well. With only the large fuse, I wonder can you damage the meter with the lower ranges? No pictures of the switch contacts. It must just be a nightmare to take it all the way apart. It's on par with the price of the Gossen Ultra and I have my doubts that it would perform as good as my UNI-T. As many problems as that Ultra has, it is a solid player when it comes to how electrically robust it is! My guess is just too many marketing wankers were involved. Had the person who wrote me and offered to test their Metrix shown the results (with the meter surviving) I may have picked one up to run. If I am going to spend this sort of cash on a demo, I would rather spend it on something that stands a chance of doing well. |
| Markus2801A:
I sorry, but I don't understand why do "we" want to destroy those devices with extrem torture testing, which will never occur in real life. A technician, who spends so much money for a DMM like the Metrix MTX 329x-Series or other high end Meter like Fluke, Gossen etc. will take care of his equipment! I indeed do understand, that good input protection and rigid construction, high quality Materials and electrical parts should be present in higher priced meters. But aren't some of these exaggerated stress tests a little bit absurd. Sorry if I say directly what im thinking, but I'am a very careful person as I know how long I have to work to be able to buy such a high priced meter! |
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