MODULE 2: Introduction To Instrumentation

Question 1

The boundary divides the system from the environment by means of signal

Answer 1

Systems

Question 2

A useful way representing a system is a block diagram

Answer 2

Systems

Question 3

The purpose of ______ for making measurements is to give the user a numerical value corresponding to the variable being measured.

Answer 3

Instrumentation system

Question 4

A measurement system have a input of the true value of the variable being measured and an output measured value of that variable.

Answer 4

Instrumentation system

Question 5

Is a system which generates information

Answer 5

Process

Question 6

Is the person who needs this information from the process

Answer 6

Observer

Question 7

Parts of instrumentation system

Answer 7

• process

- observer

Question 8

Purpose of instrumentation system

Answer 8

Link the observer to the process

Question 9

The process of determining the amount, degree or capacity by comparison with the accepted standards of the system units being used.

Answer 9

Measurement

Question 10

The use of measuring instruments to monitor and control a process.

Answer 10

Instrumentation

Question 11

A device for determining the value or magnitude of a quantity or variable

Answer 11

Instrument

Question 12

Types of instrument according to function:

Answer 12

• Indicating instrument
• Recording instrument
• Controlling instrument

Question 13

Type of instrument: visualizes the process or operation

Answer 13

Indicating instrument

Question 14

Type of instrument: observe and save the measurement reading.

Answer 14

Recording instrument

Question 15

Types of instrument: to control measurement and process.

Answer 15

Controlling instrument

Question 16

Common measured parameters, measured variables or information. Give 5:

Answer 16

Acceleration
Velocity
Displacement
Force-weight
Pressure
Torque
Volume
Mass
Flow rate
Level
Density and more

Question 17

Defined as arrangement of parts with some boundary which work together to provide some form of output from specified inputs.

Answer 17

Systems

Question 18

Uses of instrument

Answer 18

• Monitoring of processes and operations
• Control of processes and operations
• Experimental engineering analysis

Question 19

Based on electrical or electronic principles for its measurement functions.

Answer 19

Electronic instrument

Question 20

Advantages of electronic measurement

Answer 20

• Result high sensitivity rating, the use of amplifier
• Increase the input impedance, thus lower loading effects
• Ability to monitor remote signal

Question 21

Devices that can detect physical variables such as temperature, light intensity, or motion and have the ability to give measurable output that varies in relation to the amplitude of physical variable.

Answer 21

Sensors

Question 22

This element takes the output from the sensor and converts it into a form which is suitable for display or onward transmission. One example is the analog-to-digital converter (ADC).

Answer 22

Signal processor

Question 23

An element which puts the output from the sensor into a suitable form for further processing.

Answer 23

SIGNAL CONDITIONER

Question 24

Examples of a signal conditioner

Answer 24

• deflection bridge
• amplifier
• oscillator

Question 25

SIGNAL CONDITIONER | -converts impedance change to voltage change

Answer 25

Deflection bridge

Question 26

SIGNAL CONDITIONER | - amplifies millivolts to volts

Answer 26

Amplifier

Question 27

SIGNAL CONDITIONER | -converts an impedance change into variable frequency voltages

Answer 27

Oscillator

Question 28

Represents the measured value in the form which enables an observer to recognize it.

Answer 28

DATA PRESENTATION

Question 29

Examples of data presentations are:

Answer 29

- simple pointer - chart recorder - visual display unit (VDU)

Question 30

Devices that are used to control the input variable in response to the signal from a controller.

Answer 30

Actuators

Question 31

Devices that are used to change the format of a signal without changing the energy form.

Answer 31

CONVERTERS

Question 32

Element that converts a change in some physical variable into a related change in some other physical variable.

Answer 32

TRANSDUCERS

Question 33

Componets of instrumentation system: diagram

Answer 33

Input or true value -> sensing element -> signal conditioning element-> Signal processing element -> data presentation element -> output or measured value