The 149-10A and 149-30A are digital voltmeters that can measure high voltages up to a ±10kV or ±30kV AC and DC at high accuracy. Their high input impedance (1000M ohm) make them suitable for measurement of high impedance voltage circuits. Since they have a high accuracy despite their small size and light weight, they can also be easily used as portable calibrators. Measure high voltages (AC/DC) up to ±10kV or ±30kV Large 4 1/2 digits LED display High measurement accuracy and high input impedance For output voltage calibration of withstanding voltage testers and insulation testers