Hioki PD3259-50, Instruction Manual

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Voltage Sensors of the PD3259-50
71
V
2
is controlled so that
I = 0.
Assuming that V
1
= V
2
when I = 0, V
2
is measured.
Based on equation (1), I = 0 when V = 0 (when the measurement
target and the voltage sensor’s internal electrode have the same
potential).
The instrument’s voltage sensor detects the minuscule current I, and
the voltage of the voltage sensor’s internal electrode is controlled
so that I = 0. The same voltage (V
2
) as the measurement target’s
voltage ( V
1
) is generated internally by the sensor.
The instrument implements a voltage measurement method that
does not require contact with exposed metal surfaces on the
measurement target by measuring the voltage generated internally
by the voltage sensor ( V
2
) when V
1
= V
2
. (This method is known as
the coupled capacitance cancellation method.)
HIOKI PD3259C961-00