Construction- A megger is a portable device which is used for the measurement of high resistance. The component of megger[...]
Month: September 2018
Direct deflection method for measurement of high resistanceDirect deflection method for measurement of high resistance
From fig 1 we are going to measure the resistor value of a cable with outer metallic sheath available. The[...]
Voltmeter-Ammeter method for measurement of medium resistanceVoltmeter-Ammeter method for measurement of medium resistance
In the figure let us assume the voltmeter to be ideal (internal resistance Rin=infinite). So current Iv=0A I= IA+IV I=IA [...]
Method of substitution for measurement of medium resistanceMethod of substitution for measurement of medium resistance
E= External battery R= resistance to be measured S= Variable resistance R= Turning resistance Sw= Switch A= Amperemeter The position[...]
Wheatstone bridge method for measurement of medium resistanceWheatstone bridge method for measurement of medium resistance
Wheatstone bridge- Balanced Bridge condition R1/R2=R3/R4 I1=I3 and I2=I4 Vbc=Vde and Vab=Vad Vbc=I3R3 Vdc=I4R4 As Vbc=Vdc I3R3=I4R4 I3/I4=R4/R3 Vab=I1R1 and Vad=[...]
Measurement of resistanceMeasurement of resistance
Measurement of resistance- Properties of resistance plays an important role in determining performance specification for various circuit elements including coil,[...]
What is Error, types and source of errorWhat is Error, types and source of error
Error and types of error- Error is the deviation of the measured value from the desired value. It is also[...]
Different methods of measurementDifferent methods of measurement
Different methods of measurement- There are two methods of measurement- 1. Direct measurement method 2. Indirect measurement method Direct measurement[...]