The accuracy of a 0-100 mV voltmeter is ±5%. A full-scale reading of 100 mV may be due to a voltage of
The accuracy of a 0-100 mV voltmeter is ±5%. A full-scale reading of 100 mV may be due to a voltage of
Right Answer is:
105 mV or 95 mV
SOLUTION
The limiting error at full scale is
δE = ± 5% of 100
δE = ±5mv
The actual value of limiting error can be expressed as
Ea = Es ± δE
Where
Ea = Actual value
Es = Specified or rated value
δE = Limiting error
Ea = 100 ± 5
Ea = 105 to 95 mV