Products > Test Equipment
BM235 vs BM867s
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mwb1100:
Regarding the BM257s there are two nitpick things which have bugged me about the meter:

1. it can only measure plain silicon diodes - it cannot light up even a red LED.  I knew this when I bought it and figured I didn't need that capability.  But then came a day when I actually tried to test an LED and I had forgotten about the limitation...

2. the backlight remains lit for only 30 seconds.  This is something many users don't care about, but I find myself using the backlight a lot.  And the short duration drives me a bit crazy.
2N3055:

--- Quote from: Fungus on April 06, 2023, 03:17:21 am ---
--- Quote from: robdejonge on April 06, 2023, 02:13:56 am ---
--- Quote from: Fungus on April 05, 2023, 06:42:01 am ---Me? I'd get an "industrial" BM857s. ...snip... It has the 500000 count mode and bar graph, etc.

--- End quote ---
What do you say to the "6000 count is more than enough for a hobby user" comments I read here all the time?

--- End quote ---

For real work? I agree with it.

6000 counts is ~0.02% accuracy. That's plenty. Most components are 5% tolerance and I never saw a 5V power supply that was exactly 5.00V under all loads.

But ... hobbies are supposed to be entertaining. Volt-nuttery is fun and a 50,000 count meter doesn't hurt.

It's also good to have a reference meter to compare all your other meters against. :)

--- End quote ---


6000 count is 0,016% resolution... Accuracy is specified separately.

And 6000 count is good enough for very professional work..  If that work does not require more...

Professional - hobby distinction comes in play with imperative to perform at different contractual level.
You can do same thing at home for fun and be hobby user, or if you do exactly same type of work for other people and get paid for it you are pro.

There are many professionals that can perform their contractual obligations with simple meters with 3.5 digits and 0.3% accuracy with no TrueRMS. And they do it well and reliably. Professionally. Because that meter is good enough for the job they do..
robdejonge:

--- Quote from: mwb1100 on April 06, 2023, 06:44:20 am ---Regarding the BM257s there are two nitpick things which have bugged me about the meter:

1. it can only measure plain silicon diodes - it cannot light up even a red LED.  I knew this when I bought it and figured I didn't need that capability.  But then came a day when I actually tried to test an LED and I had forgotten about the limitation...

2. the backlight remains lit for only 30 seconds.  This is something many users don't care about, but I find myself using the backlight a lot.  And the short duration drives me a bit crazy.

--- End quote ---
You can’t just turn the backlight on permanently? Hm.

I believe these also apply to the BM867 / BM869. Can someone confirm?
Fungus:

--- Quote from: 2N3055 on April 06, 2023, 07:08:04 am ---6000 count is 0,016% resolution... Accuracy is specified separately.

--- End quote ---

We weren't talking about any specific model so I assumed an ideal multimeter.  :)

2N3055:

--- Quote from: Fungus on April 06, 2023, 07:32:48 am ---
--- Quote from: 2N3055 on April 06, 2023, 07:08:04 am ---6000 count is 0,016% resolution... Accuracy is specified separately.

--- End quote ---

We weren't talking about any specific model so I assumed an ideal multimeter.  :)

--- End quote ---

Your numeric estimate was correct enough.. I just wanted to point out difference between accuracy and resolution. As a clarification, nothing more..
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