20 Questions
Sensitivity of a measurement system refers to the ability of the instrument to respond to changes in the measured quantity.
True
The sensitivity of digital sensors is unrelated to the resolution.
False
A sensor with truly linear behavior has a variable sensitivity over the entire input range.
False
Accuracy is a measure of how far the output reading of the instrument is from the correct value.
True
Bias errors are classified as random errors in measurements.
False
Precision implies agreement between successive readings and closeness to the true value.
False
Repeatability refers to the precision of a set of measurements taken over a long time interval.
False
Reproducibility and precision are not closely related terms.
False
The capacity of a measuring instrument to give different readings when repetitively measuring the same quantity under the same prescribed conditions is known as precision.
False
Calibration errors are examples of precision errors in measurements.
False
The static characteristics of a sensor describe its transient properties.
False
The resolution of a sensor is the difference between the maximum and minimum value of the sensed parameter.
False
Sensitivity is the ability to reproduce a measurement with consistent accuracy.
False
Deadband refers to the range in which the sensor performs as specified.
False
The response time of a sensor is the time lag between the input and output.
True
Nonlinearity in a sensor represents the percentage of deviation from the best-fit linear calibration curve.
True
The operating temperature of a sensor does not affect its performance.
False
Span and dynamic range of a sensor refer to the difference between the maximum and minimum value of the sensed parameter.
True
Hysteresis and backlash are part of dynamic characteristics of a sensor.
True
The signal-to-noise ratio of a sensor is the ratio between the magnitudes of the signal and the noise at the input.
False
Study Notes
Measurement System Characteristics
- Sensitivity of a measurement system is the ability to respond to changes in the measured quantity.
- Sensitivity of digital sensors is unrelated to resolution.
- A sensor with truly linear behavior has a variable sensitivity over the entire input range.
Accuracy and Errors
- Accuracy measures how far the output reading is from the correct value.
- Bias errors are classified as random errors in measurements.
- Calibration errors are examples of precision errors in measurements.
Precision and Repeatability
- Precision implies agreement between successive readings and closeness to the true value.
- Repeatability refers to the precision of a set of measurements taken over a long time interval.
- Precision is the capacity of a measuring instrument to give different readings when repetitively measuring the same quantity under the same conditions.
Sensor Characteristics
- Resolution of a sensor is the difference between the maximum and minimum value of the sensed parameter.
- Deadband refers to the range in which the sensor performs as specified.
- Response time of a sensor is the time lag between the input and output.
- Nonlinearity in a sensor represents the percentage of deviation from the best-fit linear calibration curve.
Sensor Performance
- Operating temperature of a sensor does not affect its performance.
- Span and dynamic range of a sensor refer to the difference between the maximum and minimum value of the sensed parameter.
- Hysteresis and backlash are part of dynamic characteristics of a sensor.
- Signal-to-noise ratio of a sensor is the ratio between the magnitudes of the signal and the noise at the input.
Test your knowledge on the characteristics of sensors including static and dynamic properties such as sensitivity, offset, span, saturation, hysteresis, and nonlinearity. Explore the behavior of sensors in steady state and transient conditions.
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