Megger is the manufacturer of low resistance ohmmeter, megger bt51. The product makes measurement by passing a current through the conductor under test and also monitoring the voltage across it. The test current is limited by a simple current limiting circuit and is measured by monitoring the voltage across a resistor. The test current is maintained at a nominal 2 a and as the measurement is ratio metric, the reading is unaffected by any current variations. The unique features of the low resistance ohmmeter are:
