Author Topic: Brymen meters "beep" on diode check?  (Read 15032 times)

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Offline CDaniel

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Re: Brymen meters "beep" on diode check?
« Reply #25 on: October 23, 2019, 11:06:47 am »
Diode mode beep for shorted semiconductors is a "must have" if you work with a meter , you can't watch and wait the screen to settle all the time .
Many many cheap meters ( and expensive ) begining from a long time ago have the function .
That extra short beep from some Fluke models when the diode is good I don't consider particulary usefull , I allways think that something isn't right and could be a shorted component  :D . Maybe I'm too used not to have this feature
« Last Edit: October 23, 2019, 11:10:24 am by CDaniel »
 

Offline xavier60

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Re: Brymen meters "beep" on diode check?
« Reply #26 on: October 23, 2019, 11:13:08 am »
I find the short beeps useful for quickly identifying the polarity of PN junctions.
HP 54645A dso, Fluke 87V dmm,  Agilent U8002A psu,  FY6600 function gen,  Brymen BM857S, HAKKO FM-204, New! HAKKO FX-971.
 

Offline james_s

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Re: Brymen meters "beep" on diode check?
« Reply #27 on: October 23, 2019, 06:30:52 pm »
The short beep on a good junction is extremely useful, it's the sole reason I recently bought a 87V to replace my 87III. It's a huge time saver when troubleshooting or reverse engineering anything that has diodes and transistors. Use it for any period of time and you'll wonder how you ever got by without it.
 

Offline xavier60

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Re: Brymen meters "beep" on diode check?
« Reply #28 on: October 23, 2019, 09:57:57 pm »
I sent Brymen an email to let them know that a model without diode test beeps will not be my primary multimeter.
In case they did not already know this.
HP 54645A dso, Fluke 87V dmm,  Agilent U8002A psu,  FY6600 function gen,  Brymen BM857S, HAKKO FM-204, New! HAKKO FX-971.
 

Offline xavier60

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Re: Brymen meters "beep" on diode check?
« Reply #29 on: October 24, 2019, 12:45:58 pm »
I received a reply from Brymen. There will be a new multimeter series that will have diode test beeps and back light flashing, if I have understood properly.
I hope that access to diode test will not be buried too deeply, I prefer it to be a primary selection.
I did some tests on my BM857S's diode test. It appears to be a resistor dropper from a 3V source.
The voltage source should have been made higher. The short circuit current is about 400µA and drops to 70µA at the 2.4V across a white power LED.
The display shows "OL"  over 2V. Why?
« Last Edit: October 24, 2019, 08:25:47 pm by xavier60 »
HP 54645A dso, Fluke 87V dmm,  Agilent U8002A psu,  FY6600 function gen,  Brymen BM857S, HAKKO FM-204, New! HAKKO FX-971.
 

Offline fmnardini

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Re: Brymen meters "beep" on diode check?
« Reply #30 on: October 11, 2021, 12:05:12 pm »
Adding to the list, below.

---

A continuous tone for a short and a lone beep for a good PN junction:
Fluke 289 287 87V 233 179 177 175 117 116 115 77IV 73III 83 110(Old USA model, presumably 111 and 112 also) 12(Old, presumably the 11 as well) 27/FM, UNI-T 61E+
Keysight U1233A U1232A U1273AX U1273A U1272A U1271 U1281 U1282 U1241B U1242B

A continuous tone for a short only:
UNI-T UT61E
UNI-T UT71 UT181A (adjustable mV threshold)
Gossen MetraHit 29S 28S 26S/M (adjustable mV threshold)
Hioki DT4282 DT4281 DT4252 DT4253 DT4256 (adjustable mV threshold and LCD red light)
Voltcraft VC890 VC880 (adjustable mV threshold)
Appa 305 (adjustable mV threshold)
Protek 608 (adjustable mV threshold)
 

Offline BeBuLamar

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Re: Brymen meters "beep" on diode check?
« Reply #31 on: October 11, 2021, 03:38:05 pm »
All my meters emit a short beep with good forward junction and continuous beep when shorted. However, I wouldn't miss it if they don't. I always use the meter display. I work in very noisy environment so I wouldn't hear the beep any way.
 

Offline David Hess

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Re: Brymen meters "beep" on diode check?
« Reply #32 on: October 11, 2021, 06:07:30 pm »
A continuous tone for a short only:

Beckman RMS225
Tektronix DMM916
 

Offline Neutrion

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Re: Brymen meters "beep" on diode check?
« Reply #33 on: October 11, 2021, 06:39:54 pm »
The Brymen BM786, and BM789 does  a continous beep for shorted diode, and a short beep for a working one.
It also lights up the display.
 
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Offline mansaxel

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Re: Brymen meters "beep" on diode check?
« Reply #34 on: October 11, 2021, 09:36:40 pm »
Fluke 27 CE, the slightly more modern military meter, mine is last calibrated 2009, also has short beep on diode forward. I tested the function on my Fluke 10 too, as well as verifying that it does not exist on the 8060A.

Slightly related: The 10 is nearly as fast as the 8060a (which has been described by its designer in another thread here as carefully designed to be really fast) on continuity reaction; whereas the 27 CE is sluggish compared to them. You can tell via the bargraph that the resistance decrease is registered, but the meter is silent until much later.

Offline Bakaman

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Re: Brymen meters "beep" on diode check?
« Reply #35 on: October 12, 2021, 11:51:28 pm »
My 89IV has a long beep on s/c, a short beep on junction voltage of 0.61V, but no beep at all across the junctions of a Philips bipolar transistor with a forward voltage of 0.7V.
 

Offline Caliaxy

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Re: Brymen meters "beep" on diode check?
« Reply #36 on: October 13, 2021, 03:05:47 am »
So just to make it clear - does BM235 has a beep on good PN junction?
No.
 

Offline BILLPOD

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Re: Brymen meters "beep" on diode check?
« Reply #37 on: October 13, 2021, 08:34:31 pm »
Good Morning Beep Enthusiasts,   I checked my collection of DMMs and found the following beep on forward diode test:
Fluke 12B, Fluke 189, and my $25 Uni-T UT890C. :-DMM
 

Offline smile

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Re: Brymen meters "beep" on diode check?
« Reply #38 on: December 14, 2022, 04:20:15 am »
A continuous tone for a short and a lone beep for a good PN junction:

Add a cheap meter 39USD KAIWEETS KM601 Smart Multimeter.
However it can't measure 1Ohm only from 2Ohms as far as reviews list it.

I also wonder what 50Eur meters have this, KAIWEETS KM601 can't be the only one.
 


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