New EEVblog BM786 Multimeter

[sonpul]

But I want to say that I constantly and often forget to turn off the multimeter. And if the iAPO function suddenly started working, I would most likely be upset by this fact. Sometimes the probes are affected by interference, sometimes the probes are not disconnected from the measuring stand. But if it is strongly required, APO is disabled manually.

[EEVblog]

Here is what the BM235 manual says about intelligent APO:

IntelligentAuto-Power-Off (APO)

The Auto-Power-off (APO) mode turns the meter off automatically to extend battery life after approximately 32minutes of no specified activities, where applicable:

1)Rotary switch or push button operations
2)Significant measuring readings of above 8.5% of ranges
3)Non-OL readings for Resistance, Continuity or Diode function
4)Non-zero readings for Hz function
5)Electric field signal present for EF function
6)Significant movement indication as in Phase Rotation functions

In other  words,  the  meter  will  intelligently  avoid  entering  the  APO  mode  when  it  is under  normal  measurements

Other models have a somewhat different detail, but all have the general conclusion that APO won't kick in if the meter is being used - beyond just looking for button presses and switch movement.

Definitely not for the BM786, it will turn off after 30min of doing measurements. I think it resets if you change the range switch though.

[EEVblog]

Brymen have decided to open the Bluetooth protocol 
Here it is.

www.eevblog.com/files/BM780-Wireless-Communication-Protocol-r2.pdf

[slutsteg]

Maybe a beginner question, but my Brymen BM786 doesn’t show the negative sign when I measure with the black lead on + and red on - (for example on a battery). It works in mV mode  the minus sign shows there but not in V mode. The segment test on startup shows the minus symbol, so the display seems fine.
I’ve tried switching from auto to manual range, same result.
Firmware version: 78608.

Anyone know why this happens?

[2N3055]

Maybe a beginner question, but my Brymen BM786 doesn’t show the negative sign when I measure with the black lead on + and red on - (for example on a battery). It works in mV mode  the minus sign shows there but not in V mode. The segment test on startup shows the minus symbol, so the display seems fine.
I’ve tried switching from auto to manual range, same result.
Firmware version: 78608.

Anyone know why this happens?

You have it in combined AC+DC mode. Switch to DC mode.

[slutsteg]

Maybe a beginner question, but my Brymen BM786 doesn’t show the negative sign when I measure with the black lead on + and red on - (for example on a battery). It works in mV mode  the minus sign shows there but not in V mode. The segment test on startup shows the minus symbol, so the display seems fine.
I’ve tried switching from auto to manual range, same result.
Firmware version: 78608.

Anyone know why this happens?

You have it in combined AC+DC mode. Switch to DC mode.

Thanks than was it!!