What is the probable error at any point of the scale for a one-percent-accuracy indicator of range 1000°C? If the lower scale starts from 200°C, what is the range of the instrument What is the percentage of error when the indicator reads 700°C?

Question

Accepted Answer

Accuracy in percentage = [latex]\frac{ ext{true value–measured value}}{ ext{span}} =\frac{ ext{error}}{ ext{span}}[/latex]

Hence,
Error = span × 1/100 = 1000/ 100 = 10°C
Error can be either negative or positive, hence the error is ±10°C.
When the lower scale is 200°C, the range of the instrument is equal to the
minimum scale and span, i.e.,

200 + 1000 = 1200

When the meter reads 700°C, the probabilistic error is ± 10°C.
Hence, the percentage of error

[latex]=\pm \frac{10}{700} 100=\pm 1.43[/latex]%

Question 8.2: What is the probable error at any point of the scale for a o...

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