Analog Sensors and Measurement Characteristics

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What is the most important characteristic of a temperature sensor that is used to measure the temperature of a critical industrial process?

Resolution

Repeatability

Accuracy (correct)

Precision

Which of the following analog sensors is NOT commonly used to measure temperature?

Thermistor

RTD

Thermocouple

Hall Effect Sensor (correct)

What is the primary advantage of using a platinum RTD (Resistance Temperature Device) over other temperature sensor types?

High sensitivity to temperature changes

Wide operating temperature range

Linearity of output (correct)

Low cost

Which of the following temperature sensors has the highest maximum operating temperature?

Thermocouple Signup and view all the answers

What is the primary disadvantage of using a thermistor as a temperature sensor?

Non-linear output Signup and view all the answers

Which temperature sensor type is most commonly used for general-purpose temperature measurement applications?

Thermocouple Signup and view all the answers

What is the primary advantage of using a semiconductor temperature sensor over other types?

High sensitivity Signup and view all the answers

Which temperature sensor type is most suitable for applications that require very high precision and interchangeability?

RTD Signup and view all the answers

What is the primary reason for the non-linear output of semiconductor temperature sensors?

Variation in the reverse bias current across the P-N junction Signup and view all the answers

What is a key advantage of a thermistor?

It exhibits a linear output with increasing temperature. Signup and view all the answers

Which of the following statements about strain gauges is correct?

They are sensitive to force and require temperature compensation. Signup and view all the answers

What is the principle of operation for a Linear Variable Displacement Transformer (LVDT)?

It uses a movable core that passes through the center of a transformer with three windings. Signup and view all the answers

How do resolvers work for rotary position sensing?

They have two stationary windings that are 90 degrees out of phase, and the rotor winding phase is proportional to the angle of the rotor. Signup and view all the answers

Which of the following is NOT a consideration for sensor installation?

Positioning the sensor vertically for optimal performance. Signup and view all the answers

What are the two common types of analog signals mentioned in the text?

Voltage (V) and Current (I) Signup and view all the answers

What is the purpose of an analog input interface module?

To convert analog signals to digital signals for processing by a computer or controller. Signup and view all the answers

Which of the following statements about analog signals is correct?

Voltage signals are typically used for long-distance transmission. Signup and view all the answers

What is the purpose of shielding sensor wiring?

To reduce the effects of electrical noise on the sensor signal. Signup and view all the answers

Analog Sensors and Measurement Characteristics

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