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Vichy VC99 Multimeter Review and Teardown

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Smokey:
Don't mix up accuracy and resolution. 
http://www.eevblog.com/2009/08/21/eevblog-26-multimeter-counts-accuracy-resolution-calibration/

ProBang:
Hello.

An interesting comparison starts here. For one AM-140 you can get five VC99...
But, if it's necessary:


--- Quote from: grenert on October 29, 2012, 06:25:01 pm ---On the Brymen, note that the specs are actually only given for 4-1/2 digits (50,000 counts).   :o
It would be reasonable to multiply the "+/- n digits" x 10 to get an estimate for 500,000 count mode.

--- End quote ---

At AC V the 500,000 count mode doesn't exist. It's only available at DC V.
To compare the AM-160/Extech MM-570/Brymen-859 or Brymen-869 (nearby AM-140/
Extech MM-560/Brymen-857 or Brymen-867) with the Vichy-99, it would be reasonable
to divide the "+/- n digits" /10 to reach the same level of visible counts in display.

Vichy claims at the best range 0.8% + 5 Digits at AC V. Sine-wave RMS.

Brymen claims at a usual range (not the best!) 0.5% + 40. True RMS.

E.g. measuring exact 24.000 V AC and doing some math...

Vichy99 is in spec between 23.75 and 24.25 V.
Brymen-869 can show you 23.840 and 24.160 V.

Which multimeter is more accurate?

Don't forget:
- TRMS
- Brymen/Am etc. are fast as hell
- Measures are repeatable
- Higher resolution
- Better construction
- More safety

Greetings,


Hartmut

Rick:
We overlooked the fact that it has not trms... I forgot it too when buying.
Now the discussion has become more complete. So that review did not include that point unfortunately. He should have mentioned it in the video. Higher resolution is another point. Vichy has only 4 digits.
Excellent.

GEuser:
Not that i'm missing anything , but should-not the Bryman be far far better as its 183eu compared to 30? , lets talk about fishing  ;D

T4P:
TrueRMS converters have a fair bit of noise that's for sure and if you say the last digit on 50k mode is insignificant, well, doesn't the fluke 289/289 have almost the same specs?

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