That's strange. Can you go back to normal mode without any issues? Do the values change just like if the meter would work normaly? Or what does it do?
I don't want to screw my meter by accidently entering into some calibration mode, though I have the FW version 08.
"D" could stand either for "Dave", or maybe "detonator"? Does it counting back when you activate it?
Just checking whether you can log into the forum a second time...
It's also interesting that it also has the small lightning symbol like some other meter, but it never shows it. Some legal disputes with Fluke?
Hi, I'm here ^^ That icon only disappears when turning the dial. Luckily there is no tick-tock sound or any counting-down timer ![Phew :phew:](https://www.eevblog.com/forum/Smileys/default/phew.gif)
I am glad that you survived. Brymens are generally safe meters I am sure it would tell us to take cover!
But I still did not dare to try it. What does the display show when the "d" appears? Can you normally measure voltage with it? All the other options are working?
Does anyone know what the processor(not the frontend) of the meter is? If we suppose its one of the Hycons, what could be the price difference to get something with decent memory? (Apart from the current crisis of course) The are plenty of MCU on the market I suppose.
Also interesting why the 789 needs the extra shielding and pots compared to the 786.
And one general question about multimeter backlights: The reason no pwm is used to not to screw the measurements? Because if all the manufacturer are worrying about the power consumption of the backlight, why not implementing a pwm some sort?