Author Topic: Brymen BM235 Calibration Procedure  (Read 3941 times)

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Online beanflying

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Re: Brymen BM235 Calibration Procedure
« Reply #25 on: March 17, 2019, 11:45:51 am »
Everyone starts their journey by just taking a peek into the Rabbit Hole  :-DD

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Offline Fungus

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Re: Brymen BM235 Calibration Procedure
« Reply #26 on: March 17, 2019, 11:54:22 am »
Just a bit surprised to see such, err 'dedication' in the Test Equipment section rather than Metrology.  :)

The problem only exists because he has "something with higher resolution and accuracy".

If he didn't have that fancy HP meter he'd be perfectly happy with the handheld.

Moral: Ignorance is bliss.

Me? I'm sticking with my $20 ANENGs.

« Last Edit: March 17, 2019, 11:59:03 am by Fungus »
 

Online beanflying

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Re: Brymen BM235 Calibration Procedure
« Reply #27 on: March 17, 2019, 11:59:39 am »
Just a bit surprised to see such, err 'dedication' in the Test Equipment section rather than Metrology.  :)

The problem only exists because he has "something with higher resolution and accuracy".

If he didn't have that fancy HP meter he'd be perfectly happy with the handheld.

Moral: Ignorance is bliss.

But is it 'actually' more accurate and to what references. A better resolved inaccurate reading is useless >:D

EDIT: Massive image removed         BOO Where is the Fun in that  ;D
« Last Edit: March 17, 2019, 11:46:12 pm by beanflying »
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Offline Fungus

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Re: Brymen BM235 Calibration Procedure
« Reply #28 on: March 17, 2019, 12:09:57 pm »
The problem only exists because he has "something with higher resolution and accuracy".
But is it 'actually' more accurate and to what references. A better resolved inaccurate reading is useless >:D

Joy comes from creating a closed system where everything reads the same value.
 

Offline hgg

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Re: Brymen BM235 Calibration Procedure
« Reply #29 on: March 17, 2019, 12:30:20 pm »
...
 

Online beanflying

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Re: Brymen BM235 Calibration Procedure
« Reply #30 on: March 17, 2019, 12:33:17 pm »
The problem only exists because he has "something with higher resolution and accuracy".
But is it 'actually' more accurate and to what references. A better resolved inaccurate reading is useless >:D

Joy comes from creating a closed system where everything reads the same value.


Suggesting anyone should  re calibrate Meters for the sake of having them agree with each other is pointless and for all the user knows may be worse than they were before they twiddled their knob.
Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 

Offline Gyro

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Re: Brymen BM235 Calibration Procedure
« Reply #31 on: March 17, 2019, 12:42:18 pm »
... Followed by 'twiddler's remorse' and a fresh purchase. >:D
Regards, Chris

"Victor Meldrew, the Crimson Avenger!"
 

Offline Fungus

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Re: Brymen BM235 Calibration Procedure
« Reply #32 on: March 17, 2019, 01:18:44 pm »
Suggesting anyone should  re calibrate Meters for the sake of having them agree with each other is pointless

What's the alternative? Having them disagree?  :scared: :scared:

How would you know which meter to use if they don't agree?
 

Offline EEVblog

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Re: Brymen BM235 Calibration Procedure
« Reply #33 on: March 17, 2019, 01:30:47 pm »
If you only have calibration points at 50 and 500mV and if, as Dave says, the other ranges are taken care of by the internal dividers, then the calibration lab isn't going to be able to do anything about the tolerance of those dividers. It sounds as if they are within the manufacturer's spec anyway.

Correct. Although I have not actually tried it myself, you could tweak the 500mV range to get the 5V range correct, but then your 500mV would be out. It's just a limitation of this meter.
You could be sneaky and tweak the hardware divider if you were desperate enough ;D
 

Offline hgg

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Re: Brymen BM235 Calibration Procedure
« Reply #34 on: March 17, 2019, 01:55:48 pm »
Ok, I am not that desperate.   :)

The 121GW looks nice, but recently here in Greece the customs are going crazy taxing everything.
It would cost me AU$436 ... !

Are there any authorized resellers in Europe?
 

Offline Fungus

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Re: Brymen BM235 Calibration Procedure
« Reply #35 on: March 17, 2019, 02:00:23 pm »
Are there any authorized resellers in Europe?

Simon (board moderator) sells them from the UK but I don't think it's much cheaper:

https://simonselectronics.co.uk/product/121gw-multimeter-eevblog-with-probes/

(get in quick before Brexit!)
 
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Offline hgg

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Re: Brymen BM235 Calibration Procedure
« Reply #36 on: March 17, 2019, 02:02:31 pm »
Thank you!
 

Offline Apochrom

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Offline hgg

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Re: Brymen BM235 Calibration Procedure
« Reply #38 on: March 17, 2019, 02:06:44 pm »
Yes, definitely cheaper than buying it from Australia.
Thanks.
 

Offline Apochrom

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Re: Brymen BM235 Calibration Procedure
« Reply #39 on: March 17, 2019, 02:09:05 pm »
I'm just noticing, Welectron gw121 delivery time 22days...
 


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