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Multimeter for Electronic Engineering: Brymen BM869s, BM789, Fluke 289 or else?
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Songhua:
Key factors that I need for Electronic Engineering:

Color in Red is must, Color in Green is optional

RMS 
Hz, % for testing some servos, pre-defined signals
At least 50000 counts, 60000 counts is great for testing voltages around 5V
dbm (for testing some RF signals. Usually I can use an oscilloscope which has FFT with a 50 ohm attenuator to do this test or a VNA but it would be great if you can have it in a multimeter. :))
mV and mA
VFD (variable frequency drive) Optional. Can be used for motors and robotics tunning
USB to PC Optional. Sometimes it's very useful

Previously I had a Uni-T 61E+ but its mA position showed incorrect 50% value of the correct value using A position which is ridiculous for serious EE.



Sources from :


Candidates:

1. Brymen BM869s ( 500000 counts in DC mode, dbm, VFD) ( a youtube review: https://youtu.be/aSrq3UJt4qU?si=wh4bY9do9DfDPpPa)
2. Brymen BM789 (60000 counts, dbm)
3. Brymen BM786 (60000 counts, no dbm)
4. Fluke 289 (50000 counts, it has 50 ohm position, dbm, ) (too expensive, won't buy)
5. UT181A ( 60000 counts, dbm (4ohm-1200ohm) and dbv claimed to be same accurate as Fluke 289 but at 50% price)
6. Rigol DM858 or DM858E (More powerful. Can be powered by a power bank. DM858E is at almost the same price of BM869s but it's a Benchtop Multimeter. Manual here https://download.rigol.com/en/Manual/Digital%20Multimeters/DM858/DM858_DataSheet_EN.pdf)

What do you suggest, and why?
Appreciate your comments!
KungFuJosh:
If you're considering bench DMMs, you should also look at Siglent's SDM3000X series.

If you have the budget for it, also consider DMM6500.
coromonadalix:
brymen  500k  count is not real  and its limitted on some functions

many brand have the same chipsets   saying red yellow   loll  you have the green ones too

if not get  an chauvin arnoux real 100,000 count dmm ?    BT enabled  or the Metrix variants,  sure you'll pay $  witch you dont want

Uni-t  are crap   unless you go with the top model as you wrote ...


you want to do serious job as i see,  get serious meters  ....   the Brymen 789 is a good  one    why not ?

289$    you can snatch good ones on ebay ??  not paying full overpriced $$$     but slooooooooooow on boot,   some have hacked / upgraded  battery life ...

UT181A   read all the feedback to see  if it is good for you, if oled based display  MEH   NOT

Rigol,  i would  serioulsy wait 1 year or more until they iron out problems / add features or resolve bugs


you did a good work  writing your need,  but  witch one can you live without ... portability, battery life ?  or bench uses ?


my choices:  would be 869 S, (almost equal with 789) 789 and finally the 289,  (the 869S  is the better backlight display vs 869)

a fast boot 289   would be 1st, but wont happen  loll

789  are relatively new, check for teardown and tests from some member here, joe ... smith, he love to push them at their limits or blow them  loll

i use the Amprobe equivalent of the 869, AM-160A   better stability on a bench, i hate the 869 casing
But i admit  the 140 and 160 models are becoming rare

Furna:
I am pretty satisfied with Brymen BM869s and I would chose it again if I had to go again through the process for a handled DMM.
Why? Because of the features/price/reliability combination. More review at https://www.youtube.com/@joesmith-je3tq

For a bench multimeter I am pointing at Siglent SDM4000A not yet available in Europe but available in China (if you ever get one of theese please post a review in https://www.eevblog.com/forum/testgear/new-siglent-multimeter/).
KungFuJosh:
Good point! He's in China, so he could probably get one of the SDM4000A DMMs. I want one (or two) of those also. 😉
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