Sensor's Characteristics in Sensors and Instrumentations
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Questions and Answers

The static characteristics of a sensor refer to its properties when steady state conditions occur.

True

Hysteresis and backlash are part of the dynamic characteristics of a sensor.

True

Resolution refers to the difference between the maximum and minimum value of the sensed parameter.

False

Accuracy is the ability to reproduce measurements repeatedly with a given precision.

<p>False</p> Signup and view all the answers

The response time of a sensor is the time lag between the input and output.

<p>True</p> Signup and view all the answers

Resonance is defined as the frequency at which the output magnitude peak occurs.

<p>True</p> Signup and view all the answers

Deadband represents the range of input for which there is no output from the sensor.

<p>True</p> Signup and view all the answers

Signal-to-noise ratio is the ratio of change in output to a unit change of the input.

<p>False</p> Signup and view all the answers

Sensitivity is defined as the operating temperature range in which a sensor performs as specified.

<p>False</p> Signup and view all the answers

Dynamic characteristics describe a sensor's behavior when it has settled down after receiving some input.

<p>False</p> Signup and view all the answers

Sensitivity is a measure of the change in instrument output that occurs when the quantity being measured changes by a given amount.

<p>True</p> Signup and view all the answers

The accuracy of a sensor is directly proportional to error, i.e., a highly accurate sensor produces high errors.

<p>False</p> Signup and view all the answers

Bias errors can be detected or removed by statistical means.

<p>False</p> Signup and view all the answers

Repeatability refers to the precision of a set of measurements taken over a long time interval.

<p>False</p> Signup and view all the answers

Precision implies agreement between successive readings and closeness to the true value.

<p>False</p> Signup and view all the answers

The sensitivity of an analog sensor is related to the resolution.

<p>True</p> Signup and view all the answers

Loading errors occur due to changes in the sensor output when the input is zero.

<p>False</p> Signup and view all the answers

Precision is the capacity of a measuring instrument to give different readings when repetitively measuring the same quantity under the same prescribed conditions.

<p>False</p> Signup and view all the answers

The accuracy of an instrument depends on its inherent limitations.

<p>True</p> Signup and view all the answers

Error is defined as the difference between a measured value and an estimated value.

<p>False</p> Signup and view all the answers

Hysteresis and backlash are considered static characteristics of a sensor.

<p>False</p> Signup and view all the answers

The resolution of a sensor refers to the smallest change the sensor can differentiate.

<p>True</p> Signup and view all the answers

Deadband represents the range of input for which there is no output from the sensor.

<p>False</p> Signup and view all the answers

Loading errors occur due to changes in the sensor output when the input is zero.

<p>False</p> Signup and view all the answers

The accuracy of a sensor is directly proportional to error, i.e., a highly accurate sensor produces high errors.

<p>False</p> Signup and view all the answers

Sensitivity is defined as the operating temperature range in which a sensor performs as specified.

<p>False</p> Signup and view all the answers

Error is defined as the difference between a measured value and an estimated value.

<p>True</p> Signup and view all the answers

The sensitivity of an analog sensor is related to the resolution.

<p>True</p> Signup and view all the answers

The response time of a sensor is the time lag between the input and output.

<p>True</p> Signup and view all the answers

Sensitivity, offset & bias, span & dynamic range, saturation & dead zone, hysteresis & backlash, and nonlinearity are all considered static characteristics of a sensor.

<p>False</p> Signup and view all the answers

Accuracy is a measure of the difference between the measured value and actual value.

<p>True</p> Signup and view all the answers

Sensitivity is the ability of the measuring instrument to respond to changes in the measured quantity.

<p>True</p> Signup and view all the answers

Precision implies agreement between successive readings, NOT closeness to the true value.

<p>True</p> Signup and view all the answers

The sensitivity of an analog sensor is the slope of the output versus input line.

<p>True</p> Signup and view all the answers

Bias errors can be detected or removed by statistical means.

<p>False</p> Signup and view all the answers

Repeatability refers to the precision of a set of measurements taken over a short time interval.

<p>True</p> Signup and view all the answers

Loading errors occur due to changes in the sensor output when the input is zero.

<p>True</p> Signup and view all the answers

Dynamic characteristics describe a sensor's behavior when it has settled down after receiving some input.

<p>False</p> Signup and view all the answers

The response time of a sensor is the time lag between the input and output.

<p>True</p> Signup and view all the answers

Resolution refers to the difference between the maximum and minimum value of the sensed parameter.

<p>False</p> Signup and view all the answers

Study Notes

Static Characteristics of a Sensor

  • Hysteresis and backlash are not part of the static characteristics of a sensor.
  • Sensitivity, offset & bias, span & dynamic range, saturation & dead zone, hysteresis & backlash, and nonlinearity are not considered static characteristics of a sensor.
  • Accuracy is a measure of the difference between the measured value and actual value.
  • Resolution refers to the smallest change the sensor can differentiate.
  • Deadband represents the range of input for which there is no output from the sensor.
  • Loading errors occur due to changes in the sensor output when the input is zero.

Dynamic Characteristics of a Sensor

  • Hysteresis and backlash are part of the dynamic characteristics of a sensor.
  • Dynamic characteristics describe a sensor's behavior when it has settled down after receiving some input.
  • Response time of a sensor is the time lag between the input and output.
  • Resonance is defined as the frequency at which the output magnitude peak occurs.

Sensor Performance

  • Accuracy is the ability to reproduce measurements repeatedly with a given precision.
  • Precision implies agreement between successive readings.
  • Repeatability refers to the precision of a set of measurements taken over a long time interval.
  • Error is defined as the difference between a measured value and an estimated value.
  • Bias errors can be detected or removed by statistical means.
  • Sensitivity is a measure of the change in instrument output that occurs when the quantity being measured changes by a given amount.
  • The sensitivity of an analog sensor is related to the resolution and is the slope of the output versus input line.
  • Signal-to-noise ratio is the ratio of change in output to a unit change of the input.
  • A highly accurate sensor does not produce high errors.

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Description

Test your understanding of sensor's characteristics with a focus on static and dynamic properties, sensitivity, offset & bias, span & dynamic range, saturation & dead zone, hysteresis & backlash, and nonlinearity. This quiz is based on Chapter 2 of 'Sensors and Instrumentations' by Dr. Galal A. M. Atlam.

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