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Digital Meters, Display, Advantage

A 312 digit d...

Question

A $3 \frac{1}{2}$ digit digital voltmeter has an internal reference of 200 mV. It's full scale count and resolution are

A

2000 and 1 mV

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B

4000 and 0.1 mV

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C

2000 and 0.1 mV

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D

4000 and 1 mV

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Solution

The correct option is C 2000 and 0.1 mV
Count range for $3 \frac{1}{2}$ digit DVM is from 0 to 1999

i.e. 2000 counts.

$a n d R e s o l u t i o n = \frac{200 m V}{2000} = 0.1 m V$

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