Voltmeter shows S511, analog, direct conversion is designed for direct measurement of AC voltage over a wide range of frequencies and DC voltage, and for the less precise calibration instruments.
Accuracy Class 0.5.
Final value of the measuring range 3kV (3000V).More info ...
Voltmeter S53 (S 53; S-53).
Voltmeter C53 - portable electrostatic shield device for measuring voltage in DC and AC circuits in a wide range of frequencies.
Measuring range device C53: 150B.
Voltmeter accuracy class - 0.5.
Voltage - up to 3,000 volts.
Field Frequency: 2 MHz.