Key features
- Hand-cranked power: An internal low-voltage AC generator provides power, so you never have to worry about running out of batteries.
Selectable test voltages: It offers four DC test voltages: 100 V, 250 V, 500 V, and 1000 V.
- Dual measurement ranges: The MJ159 can measure insulation resistance up to 2,000 MΩ and a lower resistance range up to 5,000 Ω.
- Guard terminal: A third guard terminal helps to eliminate the effects of surface leakage current from the measurement, ensuring more accurate readings, particularly in damp or dirty conditions.
- Analog display: The durable analog display with a taut-band suspension is more resistant to extreme temperatures compared to LCD screens, making it suitable for harsh environments.
- Safety features: When connected to a circuit, the MJ159's AC voltage range will immediately indicate if the circuit is still live, preventing testing on a non-de-energized circuit. After a test on a capacitive circuit (like a long cable), the meter shows when the stored voltage has safely discharged.
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