Understanding Sensors and Transmitters

The video tutorial explains the role of sensors and transmitters in measuring physical parameters, focusing on the 4-20 mA transmitter. It covers electrical connection schemes, calibration parameters, and loop current details. An example of a flow transmitter is provided, along with assumptions about power supply and current requirements.

What is another name for a sensor?

• Primary detector

• Control element

• Secondary element

• Output device

What is the primary function of a 4-20 mA transmitter?

• To power the loop

• To convert a measured variable into a standardized signal

• To measure temperature

• To provide digital communication

Which configuration is commonly used for industrial process control systems?

• Three-wire configuration

• Four-wire configuration

• Two-wire loop-powered configuration

• Wireless configuration

What is the standard loop current range for transmitters?

• 0-10 mA

• 20-40 mA

• 4-20 mA

• 10-50 mA

What does the loop current indicate when the process variable is at zero?

• 0 mA

• 4 mA

• 10 mA

• 20 mA

In the flow transmitter example, what is the range of the measured variable?

• 0.0 to 150.0 m3/hr

• 0.0 to 200.0 m3/hr

• 0.0 to 100.0 m3/hr

• 0.0 to 50.0 m3/hr

What is the output scaling factor for the flow transmitter example?

• 0.10 mA/m3 hr

• 0.16 mA/m3 hr

• 0.12 mA/m3 hr

• 0.14 mA/m3 hr

What is the standard power supply voltage for a 4-20 mA transmitter?

• 24 VDC

• 12 VDC

• 36 VDC

• 48 VDC

What is the role of a PLC in the context of a 4-20 mA loop?

• To supply more than 20 mA current to power the loop

• To convert signals to digital

• To measure temperature

• To provide wireless communication

What is the minimum current supplied by a DCS analog input card channel?

• 20 mA

• 15 mA

• 25 mA

• 10 mA