Sr Engineer Instrumentation Interview Questions and Answers

4-20 mA is commonly used as a control signal due to its advantages in terms of noise immunity, long-distance transmission, and compatibility with various devices.

• 4-20 mA signal provides a wide dynamic range for precise control.

• It is less susceptible to noise interference compared to other signal types.

• The current loop configuration allows for long-distance transmission without significant signal degradation.

• Many devices and instruments are designed to work with 4-20 mA signal...read more

Drive DC voltage is the voltage supplied to a motor or device to control its speed and direction.

• Drive DC voltage is used in various applications such as electric vehicles, industrial machinery, and robotics.

• It is typically generated by a power supply or a motor controller.

• The magnitude and polarity of the drive DC voltage determine the speed and direction of the motor or device.

• For example, in a simple DC motor, a positive drive DC voltage will cause the motor to rotate in o...read more