How to choose an appropriate measuring instrument for electrical power and efficiency measurement?


#1

Fundamental questions for power measurement.

These questions will help you to choose the right instrument for electrical power and efficiency measurement.

1.What do i need to measure?

Is the power repetitive ?
Is the power stable ?
Do i also need to measure cycle by cycle or sub cycle power/transients?
PWM?
Noisy signal?
Wiring?

2.What accuracy do i need?

3.How can i have confidence in specified accuracy?

4.Is there one instrument for all test ?

5.What about cost effectiveness ?

Types of power measuring instruments