Question
Download Solution PDFA 0-240 V voltmeter has a guaranteed accuracy of 2% of full-scale reading. The voltage measured by the voltmeter is 150 V. Determine the limiting error in percentage.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Limiting error:
- The maximum allowable error in the measurement is specified in terms of true value, which is known as limiting error.
- It is always with respect to the true value, so it is a variable error.
- The limiting error in an instrument is given by:
LE =
where LE = Limiting error
GAE = Guarantee Accuracy error
MV = Measured value
Calculation:
Full scale value = 240 V
GAE = 2% of full scale value
GAE = 4.8 V
LE =
LE = 3.2%
Additional InformationAbsolute Error: The difference between the measured value and true value is called the absolute error.
E = Am - AT
where E = Absolute error
Am = Measured value
AT = True value
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