Why would you bother to measure the impedance of a DE-5000? It is not a passive device. It is a pointless and meaningless measurement.
Sorry, misread the post!
An insulation meter is needed to measure it properly. Something like a Gossen 27I which can measure up to 3GOhm at 500V. The Fluke's impedance should be around 1GOhm or higher.
The cheap Protek 506 & 608 are other meters that have this (not selectable)
on the mV range. They spec it at simply >1Gohm."
http://www.electronicspoint.com/threads/re-freaky-amazing-dmm.151941/
Man, that David L. Jones guy knows his stuff. He should join this forum.
Of course, this is not a critical feature for most people, but this thread is about differences between the Fluke 87V and the Brymen 869.
I certainly was surprised to find out the flagship 869 doesn't have a high Z function, when the lowly UT61 has it.
The question was why people would buy Fluke, even if it is more expensive. A high impedance mode may swing the decision for some buyers.
There are plenty of videos on the internet. It doesn't preclude a discussion on this site, answering the poster's questions.
Even if we leave Brymen aside, I'd still go for Agilent instead of a Fluke. They're cheaper and I have more trust in Agilent designs.That's a bold statement.Not saying that's a fact, that's my personal opinion, based on the fact that Agilent has a lot more experience in test and measurement. They've done so much it's silly to compare the two.
Weren't there times when HP wasn't making handheld DMMs at all?
- 250us peak min/max. It's hard to convey in words how awesome this feature is. This means the meter can replace an oscilloscope in many scenarios.
- 8V diode test. 'Nuff said. No other meter does this.
- No backlight timer. Once you turn it on, it stays on. This shows a deeper philosophy. The Fluke engineers assume that the users are people who know what they're doing, not senile old women.
- 250us peak min/max. It's hard to convey in words how awesome this feature is. This means the meter can replace an oscilloscope in many scenarios.
Never a meter can replace an oscilloscope and vice versa, i unlikely would trust a multimeter for this type of measure, too many variables can distort the result.
- 8V diode test. 'Nuff said. No other meter does this.
It's a function mainly wanted by power led tinkerers for Vf binning, normally they search this for cheap, probably a small case number so most brands do not matter to implement that.
- No backlight timer. Once you turn it on, it stays on. This shows a deeper philosophy. The Fluke engineers assume that the users are people who know what they're doing, not senile old women.
I agree, but the definitive solution is to have both possibilities by mean of separate UI actions.
About Hi Res digit rounding, sure it's not a deal breaker, to stop the moan it's enough to leave it in hi-res mode, that works a treat for tendency monitoring like Martin shows in many other videos like
So not a defect but a killer app for BRYMEN.
The Fluke main lacks are :
- no double display
- no pc connection
- no nice price (at least in EU)
My answer is : the 87V has a better construction quality and Fluke has a better reputation, if priced within 300E VAT included (new from authorized dealer) it could have been my choice, but @ 500E i should find a very specific reason against the BRYMEN.
- No backlight timer. Once you turn it on, it stays on. This shows a deeper philosophy. The Fluke engineers assume that the users are people who know what they're doing, not senile old women.
Weren't there times when HP wasn't making handheld DMMs at all?It would seem it took the 2008 acquisition of Escort by Agilent before they ever got into the handheld DMM business, as such a product isn't mentioned on either HP's or Keysight's product timeline or company history.
... the HP 970 series which seems to be maybe early 1990s looking at the date of the oldest manual. No idea whether the latter was an in-house design or simply a rebadge. (Maybe those were made by Escort??)
Except the specs are absolutely clear on what that mode does and what the accuracy is. There are no random variables like with certain Asian meters. It's not a useless gimmick like on the Brymen.
No, it clearly shows the engineers didn't think the design through. Either that, or they just didn't gave a shit. Wait, maybe that's the reason they design a backlight that makes an annoying high pitched sound. How can you rely on a meter that does weird, unexpected things?
Double display? What for? It's not displaying anything useful, like voltage and current at the same time. PC connection - again, what for? Data logging? There are meters for that, like the Fluke 289. But they suck as general use meters.
And the price? Well, you gotta pay to play.
EDIT: Oh, and let's not forget the 4 times longer battery life of the 87V vs. the Brymen BM869s.
Except the specs are absolutely clear on what that mode does and what the accuracy is. There are no random variables like with certain Asian meters. It's not a useless gimmick like on the Brymen.
Let's put things in this way :
who will trust to PSU reviews where the output transient analysis is performed exclusively by Fluke 87V peak function, without DSO capture screens ?
The random variables are on the signal nature, who assure you that what you are going to measure will respect the 87V's peak function rigid time constrains, beyond which your expensive toy will start to say you serious BS ?
The answer is : a DSO, this renders this kind of feature useful only to take voltage reading with short touch and go probe action.
Many lemmon PSUs out there source trains of very short pulses during power switch ON/OFF/ON cycles, well beyond 87V's peak detection capabilities.
And when it comes to PC power supply .... LOL ... try to put an high BW DC current clamp probe on 12V power rail and watch on scope screen how fast are load transients, also here 87V peak detector is still a useless and deceiving function.
No, it clearly shows the engineers didn't think the design through. Either that, or they just didn't gave a shit. Wait, maybe that's the reason they design a backlight that makes an annoying high pitched sound. How can you rely on a meter that does weird, unexpected things?
I wonder if you really wacthed those videos, the truth is there, no weird things with high res mode engaged, the BRYMEN has one digit more than 87V and it's working good for tendency monitoring, you have to accept it.
Double display? What for? It's not displaying anything useful, like voltage and current at the same time. PC connection - again, what for? Data logging? There are meters for that, like the Fluke 289. But they suck as general use meters.
No highed pitched sound in BM869S and talking about design flaws or crap component inside also Fluke has its OOOPS, like leaking supercap in 189 series.
About double display i think that Frequency plus Amplitude or DC plus AC are useful, of course current plus voltage would have been better.
And the price? Well, you gotta pay to play.
One can play for a lot less, even better, if capable enough.
"Clothes do not make the man", yes it applies very well here.EDIT: Oh, and let's not forget the 4 times longer battery life of the 87V vs. the Brymen BM869s.
What really i cannot forget is the 2 times price factor, for the rest is matter of taste or personal needing.
I could afford easily the 87V, but why spend much more for less ?