Meter accuracy specification question

USB tester says "Voltage measurement accuracy: ± (0.8% + 4 words)"

What does the "4 words" mean?

Thanks.

On a sunny day (Sat, 1 Oct 2022 22:36:16 -0400) it happened John S snipped-for-privacy@invalid.org wrote in <thatf8$1aocf$ snipped-for-privacy@dont-email.me:

Goolge translate from Chinese?

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.......Phil

From one idiot to the other - here is all the available info:

Ignore it. google translate garbage. Probably meant 4 counts. Who cares ?

The term "words" is incorrect - it should be "digits". See below.

Elsewhere at the website you posted it says "Voltage measurement accuracy: ± (0.8% + 4 digits)" To see the above, go to that website, scroll down to Product guides and documents then click on User Guide (PDF). See the technical parameters.

Ed

I missed seeing that. Thanks much for pointing it out.

Cheers.

Shouldn't this have been obvious? This is the way meters are spec'd, a percentage plus some number of counts.

Has anyone seen a meter specified differently?

Dither.

"+" does not mean "or". It means PLUS. The total error can amount to 0.8% of full scale PLUS 4 counts.

That is a very standard way to specify error ranges because of different error sources.

what SOCs have a 4bit 2GHz converter?

almost certainly some MCU with a 10-12bit adc at maybe a MHz