Products > Test Equipment
Greenlee DM-820 DMM (rebranded Brymen) teardown
<< < (3/3)
Trader:
WOW, another fix (I won't modify first post).

After reading:  https://www.eevblog.com/forum/beginners/looking-for-help-selecting-a-budget-multi-meter-im-quite-overwhelmed/msg2411139/#msg2411139

Seems that THIS "Greenlee DM-820" is the BM815s, not the BM857s.

http://www.brymen.com/PD02BM810s_815s.html

It's crazy, but seems that Greenlee released some DMMs with the same model name "DM-820".


--- Quote from: Trader on February 05, 2023, 05:33:12 am ---
--- Quote from: Mephitus on July 17, 2015, 06:53:15 pm ---I recently made an eBay score of this Greenlee DM-820 for $31USD :-DMM. Which from my research is just a rebranded Brymen BM859.

--- End quote ---

I know this is an old thread but seems the Greenlee DM-820 is like the Brymen BM857, not BM859.

Some differences:

- the AC Bandwidth that's 20kHz on Greenlee DM-820 and Brymen BM857, but 100kHz on Greenlee DM-860 / Brymen BM859 / Amprobe AM-160-A / Extech MM570A.

- 1 temperature measure, not 2 temp measures like in the BM859

- a little less accuracy in almost all scales

- I'm not sure if has AC+DC measurements.

https://www.welectron.com/mediafiles/datasheets/brymen/Brymen_BM850s_Datasheet.pdf

Another curiosity, Greenlee released a new model also called "DM-820", but it's a 10,000 counts meter.

Greenlee DM-820 is still an excellent DMM ($31 is a giveaway), I'm just clarifying the comparison.

And just to add another comparison, seems the BM859 is a little more precise them the BM869 in DC voltages:

- between 5V and 50V (0.02%+2d vs 0.03% + 2d)
- above 500V (0.05%+2d vs 0.15% + 2d)
* Input Impedance: 10M, 30pF nominal (80pF nominal for 500mV range) vs 60pF.

--- End quote ---
J-R:
DM-820 vs DM-820A...

From what I'm seeing:

Greenlee DM-820 is the original Brymen BM815, without the "s", so no BeepJack feature.

Greenlee DM-820A is the BM827s but adds a backlight.  I don't see a Brymen that matches this exactly, maybe a custom tweak per Greenlee's request?
Neutrion:
Is that a Hycon IC made in Japan? Or they used something different?
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod