Errors in the compensation method of measuring pulsed voltages

Conclusions

• 1) For correct operation of a slideback voltmeter which measures pulsed voltages, it is not necessary to aim at a minimum threshold operating voltagev of the indicator, but at a value ofv which meets the requirements given in (3) or (9). Eqs. (3) and (9) do not provide separate values forv and R, but only determine the relation between them and the diode parameters A andk. The choice ofv and R is more or less arbitrary. One consideration for choosing R should consist in providing sufficient time for capacitance C_L to discharge between the pulses.

• 2. The measurement error due to the error or the instability of the indicator's threshold of operation or the diode load resistor can be computed from (6) and (7).

• 3. By choosing the load capacitance C_L by means of (17) it is possible to reduce the voltmeter error due to transient processes. Since the value of C_L in (17) depends on the measured voltage, it may be advisable to couple the adjustment of the compensating voltage E with that of capacitance C_L.