Raytech WR14-R Instruction Manual page 15

Low Resistance Testing:
The WR series of test instruments utilize a 4 wire measuring technique for each Channel. The
points where the potential leads are connected determine the resistance reading.
The test set employs a very simple principle of Ohm's law:
Instruction Manual Winding Resistance Meter
Type WR100 / WR50 / WR14
U
R=
I
R = Resistance
U = Voltage
I = Current
Page 15 of 139