Multiple test voltages for spot and step voltage testing
Guard terminal to eliminate surface leakage current
The MJ459 and MJ159 replace the BM12 and MJ10, respectively. Four models are available for general purpose testing which include a low-voltage model. All are portable, self-contained instruments designed to give rapid and accurate measurements. Four of the models feature an analog display having four selectable test voltages of 100, 250, 500 and 1000 V dc, measuring insulation resistance up to 2000 MΩ and an ohm range to 5000 ohms. The other model has four test voltages of 50, 100, 250 and 500 V dc measuring insulation resistance up to 1000 MΩ.