[time-nuts] 5 Digit Panel meters

[Bob kb8tq]

Hi

Measurement accuracy as stated in the listing is 0.3% or 3,000 ppm. Some listings call it out
as 0.3% +/- 2 LSD.  Since they removed the markings from some of the chips, figuring out exactly 
what’s in there could be a bit exciting.  

Full scale is 33V so the full range display would be 33.000 . The LSD is 1 mv so +/- 2 LSD would
be +/- 2 MV. 

We are looking for 5 / 2^16 volts. That’s 76 uV. Ten DAC LSB’s still don’t get you to 1 mv. 

I’d bet the target audience for these meters are some sort of 24V battery setup. The voltage 
range would make sense in that case. 

Bob


> On Sep 7, 2020, at 1:20 AM, Perry Sandeen via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> 203076543505