Products > Test Equipment
Brymen BM789
J-R:
The 500,000 count mode on the BM869s can win out over the BM789, for example 7V. You lose a digit on both going up a range, but you can bring it back on the BM869s and it's going to be a usable digit.
The dual display on the BM869s is hard to beat, but on the flip side the BM789 has AutoV/LoZ and NCV detection. Brymen just wants you to own both...
joeqsmith:
Not being an electrician, I seldom use ACA, ACV, NCV or LowZ modes. If I am looking at AC, it is normally some odd ball wave shape and I want the AC+DC with the split display. Actually, I like meters that can show even more than two parameters on one screen just to save time. Most likely I am using a scope. Having that split display for temperature has proven to be very useful.
Someone else had posted about the stability of the 500k mode and I had made a short video showing a few high res meters with a somewhat constant voltage applied. It no doubt moves and has a few counts of noise but it has been good enough to spot some trends.
sonpul:
YulyPH
Thank you.
I am pleased with both the brightness and duration of the BM789 backlight.
But I always wanted to have a mode so that the backlight would turn on itself immediately and turn itself off after 15 minutes.
Any ideas on how to implement this?
--- Quote ---As long as you don't need data logging the BM789 seems the better one as a general purpose meter.
And this was the answer that I was searching for that no one seemed to give.
--- End quote ---
I have always said that the BM789 was created very well. What would you notice about the long backlight time, AutoHold, easy-to-read display and much more
joeqsmith
But in AC+DC mode, the main display shows the RMS calculation using the formula
And that's exactly what the BM789 displays.
BM869s should display the same thing. Calculation of RMS using the formula.
What do you want to see on the second display?
What do you even see on the second display ?
AC or DC or can you switch between AC and DC on the second display?
joeqsmith:
--- Quote from: sonpul on August 06, 2024, 02:57:19 pm ---joeqsmith
But in AC+DC mode, the main display shows the RMS calculation using the formula
(Attachment Link)
And that's exactly what the BM789 displays.
BM869s should display the same thing. Calculation of RMS using the formula.
What do you want to see on the second display?
What do you even see on the second display ?
AC or DC or can you switch between AC and DC on the second display?
--- End quote ---
Math isn't in question. Nor is the fact that the 789 supports AC+DC (many don't and I have to calculate by hand).
--- Quote ---If I am looking at AC, it is normally some odd ball wave shape and I want the AC+DC with the split display. Actually, I like meters that can show even more than two parameters on one screen just to save time. Most likely I am using a scope. Having that split display for temperature has proven to be very useful.
--- End quote ---
BM869s will display DC and AC, or AC+DC and AC. I have a few meter that will show AC, DC and AC+DC at the same time.
Fungus:
--- Quote from: YulyPH on August 05, 2024, 06:25:10 pm ---BM869s seems like a mistake as BM789 is better for AC voltage (more accurate voltage up to 100kHz - both meters go higher than that) and the readings are way faster (BM869s needs a few seconds to stabilize).
--- End quote ---
I use an oscilloscope for anything "AC" that isn't mains voltage.
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