M.Sc. (Semester (CBCS) Examination Mar/Apr-2018
Electronics
INSTRUMENTATION DESIGN
Time: 2½ Hours
Max. Marks: 70
Instructions: Q. and are compulsory. Answer any three questions from Q.3 to Q.7. Answer any 5 questions. Figures to the right indicate full marks.
Q.1
Choose the alternatives given below.
08
Gauge factor may be defined as the ratio of change in with respect to the change in the length.
Length
Distance
Resistance
None of these
To measure rate of flow of liquid, generally, is used.
Electromagnetic flow meter
Turbine flow meter
Both a and b
None of these
For the single channel DAS of the instrumentation an analog to digital converter is recommended.
ADC 0804
ADC 09
ADC 1408
All of these
Which of the following features considered for selection of transducer?
Range
Accuracy
Linearity
All of these
The temperature coefficient of the transducer is 25m the gain of signal conditioner, if reference for ADC is 2.56 volt and range of the instrument is from zero 0C to 10000C, would be
More than 10
less than or equal to 2
More than 100
Equal to 10
In case of 4 to 20mA current transmission the full scale current span is
0 to 20mA
20mA
16mA
24mA
Which of the following is most suitable signal conditioner?
IC-2B31
IC-2B30
IC-2B35
All of these
For measuring instrumentation stage is the essential stage.
Computing device
Current limiter
Bridge amplifier
None of these
State True or false.
06
For J and K type thermocouples instrumentation amplifier are needed.
The SY-HS-220 is the precision temperature sensor.
The LVDT is based on principle of magnetic induction.
In the ratiometric conversion the system sensitivity is independent of the reference voltage.
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SLR-UJ-322
To increase the speed with which information is accurately converted, sample-hold circuits are used.
The resolution and accuracy of an ADC is always expressed in percentage.
Q.2
Attempt any two of the following.
10
Write a note on Hall-effect.
Explain characteristics of 4-20mA current loop.
Explain isolation amplifier model 289.
Explain the techniques of measuring level of liquid.
04
Q.3
Explain construction and working principle of LVDT.
08
Explain with suitable circuit diagram the designing of AC bridges.
06
Q.4
Explain the interfacing circuit for PT100 and AD590 to microcontroller.
08
Write a note on compact data loggers.
06
Q.5
Explain in Strain gauge and derive the expression for gauge factor.
08
Explain signal transmission in detail.
06
Q.6
Explain in detail I to V and V to I converter.
08
Write a note on IR proximity sensor.
06
Q.7
Explain in detail general block diagram of instrumentation for Measurement.
08
With suitable diagram, describe the use of multichannel DAS.
06