Question

How is the megger calibrated?

(a) in steps of 1 unit per division

(b) based on the value of resistance to be measured

(c) directly calibrated on the position of the pointer

(d) reversely calibrated based on the pointer position

I had been asked this question in exam.

The above asked question is from Applications of Megger in division Measurement of Resistance of Electrical Measurements

Answer 1

Right answer is (d) reversely calibrated based on the pointer position

The explanation is: The scale in a megger is calibrated such that normal position of a pointer indicates infinity while full scale corresponds to zero resistance.