M.Sc. (Semester (CBCS) Examination Oct/Nov-2017
Electronics
INSTRUMENTATION DESIGN
Day Date: Saturday, 18-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: Q. and are compulsory.
Answer any three questions from Q.3 to Q.7.
Answer any 5 questions.
Figures to the right indicates full marks.
Q.1 Choose the alternatives given below. 08
In capacitance transducers the capacitance is depends upon
Dielectric constant Effective area of the plate
Distance between two plates All of these
Which of the following has proper direction as well as magnitude?
Excitation potential Grounding
Shielding All of these
To measure physical parameters, in terms of change in the resistance,
bridge would be used.
AC DC
Capacitive All of these
For signal conditioning of both AC as well as DC signal, is the
most suitable monolithic signal conditioner.
IC-2B31 IC-2B35
IC-2B30 All of these
In case of LVDT, when core is at null position, which of the following is
correct?

None of the above
Chromel Alumel thermocouple is of types of thermocouple.
T E
J-K None of these
The recorder, in which one of the variable is plotted against time is
called
X-T recorder Digital recorder
X-Y recorder Graphic recorder
The temperature coefficient of the sensor LM35 is
25m V/0K 10m V/0C
10m V/0K None of these
State True or false. 06
Isolation amplifier is used to isolate the stages in instrumentation
amplifier.
Electromagnetic shielding is used for coupling with two circuitry.
For the single channel DAS the IC 0808 ADC is used because it has
only one analog channel.
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SLR-MJ-348
The sensor SY-HS-220 is precision humidity sensor.
If transducted signal has a range of 0m V to 100m V and reference
voltage for ADC is 2.56 volt, then gain of instrumentation amplifier
should be more than 100 to avoid saturation.
For JK thermocouple AD595 is most suitable instrumentation amplifier.
Q.2 Attempt any two of the following. 10
What is need of DAS?
Write a note on selection criteria for transducer.
Explain general block diagram of measuring instrument.
Explain in detail, Isolation amplifier. 04
Q.3 Explain construction and working principle of the thermocouple. 08
Write a note on V-F converter. 06
Q.4 What do you mean by recorder? Explain in detail the Strip chart recorder. 08
Write a note on 2B30 the programmable signal conditioner. 06
Q.5 Explain in detail the static as well as dynamic characteristics of sensors. 08
Write a note on Multi-channel DAS. 06
Q.6 Explain the concept of grounding and shielding? Write a note on AD620 as
instrumentation amplifier.
08
Explain the method used to measure used to measure liquid level precisely. 06
Q.7 Explain strain gauge and derive the expression for gauge factor. 08
What do you mean by LCD, which should be used for measurement
instrumentation?