Measurements Notes | EduRev

: Measurements Notes | EduRev

 Page 1


Measurements
Part 1: Basic Principle of Measurements 
Page 2


Measurements
Part 1: Basic Principle of Measurements 
Learning objectives
? To state sub-systems in a measurement system
? To understand main function in each sub-system 
? To understand the basic properties of measurement 
systems
? To understand the basic operation of ADC and DAC
Page 3


Measurements
Part 1: Basic Principle of Measurements 
Learning objectives
? To state sub-systems in a measurement system
? To understand main function in each sub-system 
? To understand the basic properties of measurement 
systems
? To understand the basic operation of ADC and DAC
Basic components in a measurement system
Basic components in a measurement system are shown below:
It is also important to mention that a power supply is an 
important element for the entire system.
Amplification and Conditioning
Page 4


Measurements
Part 1: Basic Principle of Measurements 
Learning objectives
? To state sub-systems in a measurement system
? To understand main function in each sub-system 
? To understand the basic properties of measurement 
systems
? To understand the basic operation of ADC and DAC
Basic components in a measurement system
Basic components in a measurement system are shown below:
It is also important to mention that a power supply is an 
important element for the entire system.
Amplification and Conditioning
Major issues in instrumentation and measurement systems
? Sensitivity (deflection over the change in the variable)
? Accuracy (uncertainties)
? Precision (spread of readings, repeatability)
? Resolution (the smallest step that can be distinguished)
? Robustness (noise, disturbance, or drift)
? Response time (fast response/high bandwidth)
? Input impedance (loading effect)
Page 5


Measurements
Part 1: Basic Principle of Measurements 
Learning objectives
? To state sub-systems in a measurement system
? To understand main function in each sub-system 
? To understand the basic properties of measurement 
systems
? To understand the basic operation of ADC and DAC
Basic components in a measurement system
Basic components in a measurement system are shown below:
It is also important to mention that a power supply is an 
important element for the entire system.
Amplification and Conditioning
Major issues in instrumentation and measurement systems
? Sensitivity (deflection over the change in the variable)
? Accuracy (uncertainties)
? Precision (spread of readings, repeatability)
? Resolution (the smallest step that can be distinguished)
? Robustness (noise, disturbance, or drift)
? Response time (fast response/high bandwidth)
? Input impedance (loading effect)
Sensitivity
Variation of the physical variables
Most sensitive
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