Author Topic: EEVBlog 121GW Discussion thread  (Read 148441 times)

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Offline joeqsmith

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Re: EEVBlog 121GW Discussion thread
« Reply #1350 on: January 12, 2019, 01:21:34 pm »
I updated #1344 to include my "good" Mastech meter along with a few others.   

16 meters tested so far (not including the 121GW) and not one of them fits this criteria   "Every multimeter has the advertised number of counts 4000 , 6000 , 50000 all the time and switches up and down above this value , lets say at 4400-4100 , 6600-6300 , 55000-52000 ..."
   :-DD :-DD


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

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Re: EEVBlog 121GW Discussion thread
« Reply #1351 on: January 12, 2019, 07:54:05 pm »
VC 940 (UT71E): 4.0 V up 3.8 V down
34465A: 1.2 V up 1.0 V down
« Last Edit: January 12, 2019, 07:55:46 pm by Messtechniker »
Agilent 34465A, Hameg HMO1022, R&S HMC 8043, Voltcraft VC 940 and M-Audio Audiophile 192
 

Offline newbrain

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Re: EEVBlog 121GW Discussion thread
« Reply #1352 on: January 12, 2019, 08:33:22 pm »
34465A: 1.2 V up 1.0 V down
:scared: Finally we got a winner!  :scared:
The nominal counts for this meter are 1000000, so its hysteresis is not across its range but above!

All the others meters must clearly be exceptions!
 :-DD :palm: :-DD
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Online beanflying

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Re: EEVBlog 121GW Discussion thread
« Reply #1353 on: January 12, 2019, 09:06:47 pm »
You guys are clearly unable to see the immensity of the issue and pushing the manual range button is just so hard  :o

Cruddy Victor 86B 4000 count logging meter up at 4000 and down at 3500.

My couple of bench meters so not perhaps applicable.
Agilent 34401A up at 1200000 and down at 1000000 having to lock ranges measuring 1 & 10V references is destroying my faith in it as it loses resolution :-DD
Advantest 6871E up at 2000000 and down at 1800000 clearly a superior beast for Vref testing at 1 & 10V as the Auto range is 'perfect' for the measurement at hand.

Think you will find the 34465A is 'rated' at 120K 100k + 20% over range as it is 34401a derived.

Want more resolution push a button or buy a better meter?

Quote
From the 34401A manual

Resolution
Resolution is the numeric ratio of the maximum displayed value divided
by the minimum displayed value on a selected range. Resolution is
often expressed in percent, parts-per-million (ppm), counts, or bits.
For example, a 6 1⁄2-digit multimeter with 20% overrange capability can
display a measurement with up to 1,200,000 counts of resolution.
This corresponds to about 0.0001% (1 ppm) of full scale, or 21 bits
including the sign bit. All four specifications are equivalent

edit must wear glasses or use commas typing 000's
« Last Edit: January 12, 2019, 09:53:41 pm by beanflying »
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Offline joeqsmith

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Re: EEVBlog 121GW Discussion thread
« Reply #1354 on: January 13, 2019, 07:29:13 am »
Updated my list again.  The OWON and UT61E are both listed at 22,000 count meters.  Once again, the break points straddle the rated count. 

I am still looking for at least one handheld meter that does what CDaniel claims they do.  Surely they must have seen this at least once in their life to make such a bold claim but I think it would be difficult to locate based on the data we have gathered so far.
How electrically robust is your meter?? http://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline Dundarave

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Re: EEVBlog 121GW Discussion thread
« Reply #1355 on: January 13, 2019, 03:09:51 pm »
I'm just about to order up a 121GW for myself, after assimilating the combined wisdom in the various 121GW threads.  The meter appears to offer incredible value, and it will certainly fit my needs, despite any arguable negatives.

But before I placed my order, I did want to confirm that there is no new hardware version imminent, like, shipping the day after I get the current version delivered, lol.

I realize that firmware updates are an ongoing thing, but I would just hate to miss out on hardware version 2.0 or whatever by a few weeks and end up with "old stock" (although I realize that getting in on the first run of any manufacturing version has its risks).

Thanks -  :-DMM
 

Offline GeoffreyF

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Re: EEVBlog 121GW Discussion thread
« Reply #1356 on: January 14, 2019, 01:57:02 am »
I see no reason to believe there is a new hardware version coming out, not at least in the sense that it would be improved or have better specifications.   With any other meter, it would be rather hard to say that because such things are more closed.  With this one, it would be actively discussed here.   That said, there is always the possibility with any manufactured product of minor changes but not ones which appreciably alter the specifications.

There also may be other firms with something in the offing that would be interesting but this particular meter is also a relatively new release itself.   My sense or view of such things is whether the product is the best for your purposes and purse.  If yes, then that's it.  If not, then keep shopping. My sense of where things are going is that there is more specialization for particular trades.  General purpose meters are pretty similar but differ in ruggedness or accuracy - tracking price.   I like my 121 GW a lot.  It's been great.
 
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