RD-140voltage divider - high voltage meter

RD-140 DC and AC high voltage meter is designed to measure DC and AC sinusoidal voltage up to 140 kV.
High voltage meters RD-140 are used in high-voltage testing laboratories of the electrical and energy profile, as well as research institutions to measure the effective value of alternating voltage with a frequency of 50 Hz or the average value of direct voltage.
The device consists of a high-voltage block RD140-BV and an indicator module RD140-MI.
Specifications RD-140:Measuring range:- direct current voltage (average value) - from 10 kV to 140 kV;- alternating current voltage (effective value) - from 10 kV to 100 kV;- frequencies when measuring AC voltage - from 47.5 Hz to 52.5 Hz.
The input impedance of the high-voltage block RD140-BV at direct current is from 940 MΩ to 980 MΩ.Input impedance on alternating current with a frequency of 50 Hz - not less than 200 MΩ.
Limits of permissible relative error when measuring voltages of direct and alternating current - ± 0.5%.The readout resolution of the RD-140 meter is 0.001 kV.Measuring module input voltage range (peak value) - ±1 V.The given measurement error in the range from 0 to +40 ° C is no more than 0.01%.Frequency range - from 0 to 3.5 kHz.Decimal resolution - 5.Conversion time - no more than 0.3 s.
The frequency range of the radio channel RD-140 is from 845 MHz to 945 MHz.Number of frequency channels - 16.Transmitter power - 1 mW. Power is supplied from four built-in AA Ni-MH batteries with a voltage of 1.2 V and a capacity of 1.6 A∙h to 2.1 A∙h:- supply voltage - from 4.8 V to 5.2 V;- duration of continuous operation without recharging - at least 8 hours.
The range of the radio channel is at least 5 m.The duration of continuous operation of RD-140 at maximum input voltage is no more than 1 hour.Duration of continuous operation at input voltage up to 75 kV - no more than 8 hours.The time for establishing the operating mode after turning on the power is 1 min.The service life of RD-140 is at least 10 years.
Dimensions:- RD140-BV - diameter 280 mm, height 880 mm;- RD140-MI - 95×190×40 mm;- board RD140-MI - 65×75×20 mm.
Weight:- RD140-BV - no more than 11 kg;- RD140-MI - no more than 0.5 kg.
Operating conditions RD-140:Ambient temperature - from +10°С to +35°С.Relative humidity - up to 80%.Atmospheric pressure - from 84 kPa to 106.7 kPa (from 630 mm Hg to 800 mm Hg).
The coefficient of non-sinusoidality of the measured AC voltage - no more than 8%.The ripple coefficient of the measured DC voltage - no more than 1%.
The distance from the high-voltage unit RD-140-BV to conductive objects that are grounded or under potential is at least 1 m.
Operation of RD-140 indoors in the absence of shaking, vibrations, vapors of aggressive liquids.