AI 09 406-ELECTRONIC INSTRUMENTATION AND MEASUREMENT MAY 2012 (2009 Admissions)

SUBJECT - ELECTRONIC INSTRUMENTATION AND MEASUREMENT

CODE -  09 406

SEMESTER - FOURTH

BRANCH - AI

UNIVERSITY - CALICUT

YEAR - 2012

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Part A

Answer all Questions

1.What is meant by systematic error?

2.Name the basic blocks of a digital instrumentation system.

3.What is the necessity of curve fitting?

4.What are the advantages of flash ADC?

5.What do you mean by baby sitting mode in a DSO ?

(5x2=10 marks)

Part B

Answer any four questions,

6.Define the terms:

(a)Threshold

(b)Hysteresis

7.A 0-100V voltmeter has 200 scale divisions which can be read to to 1/2 division. Determine the resolution of the meter in volt.

8.Explain the impulse response of a first order system.

9.With schematic explain R-2R ladder DAC.

10.Write a note on LCD.

11.What is the basic principle of sampling oscilloscope.

(4x5=20 marks)

Part C

Answer all questions

12.(a) With block schematic explain the functional elements of a measuring system.

Or

(b) Explain:

i.Line fitting.

ii.Curve fitting.

iii.Goodness of fit test.

13.(a) With block diagram explain a pulse generator.

Or

(b) With block schematic describe the working of sweep frequency generator.

14.(a) With schematic explain Successive Approximation ADC.

Or

(b) Explain the principle of weighted capacitor DAC. Compare its performance with weighted resistor DAC.

15.(a) With block schematics explain true RMS meter.

Or

(b) Explain the principle of operation of X-Y recorder with the help of block diagram.

(4x10=40 marks)

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