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Electronic Measurements & Instrumentation unit wise question and answers free pdf download
Pankaj Yadav

Electronic Measurements & Instrumentation unit wise question and answers free pdf download

Pankaj Yadav | 21-May-2016 |
Question & Answers ,

Hi friends, here Pankaj Yadav uploaded notes for ELECTRONIC MEASUREMENTS & INSTRUMENTATION with title Electronic Measurements & Instrumentation unit wise question and answers free pdf download. You can download this lecture notes, ebook by clicking on the below file name or icon.

1. What are the basic performance characteristics of a system?
Ans:
STATIC CHARACTE RISTICS
The static characteristics of an instrument are, in general, considered for instruments which are used to
measure an unvarying process condition. All the static performance characteristics are obtained by one
form or another of a process called calibration. There are a number of related definitions (or
characteristics), which are described below, such as accuracy% precision, repeatability, resolution,
errors, sensitivity, etc.
l. Instrument: A device or mechanism used to determine the present value of the quantity under
measurement.
2. Measurement: The process of determining the amount, degree, or capacity by comparison (direct or
indirect) with the accepted standards of the system units being used.
3. Accuracy: The degree of exactness (closeness) of a measurement compared to the expected (desired)
value.
4. Resolution: The smallest change in a measured variable to which an instrument will respond.
5. Precision: A measure of the consistency or repeatability of measurements, i.e. successive readings
does not differ. (Precision is the consistency of the instrument output for a given value of input).
6. Expected value: The design value, i.e. the most probable value that calculations indicate one should
expect to measure.
7 Error: The deviation of the true value from the desired value.
8. Sensitivity: The ratio of the change in output (response) of the instrument to a change of input or
measured variable.

 

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