Hioki 3181-01, Instruction Manual

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Chapter 6 Applications
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Power factor cos
θ
=
=
Effective power [W]
Reactive power [VA]
(WATT) W
(ACV)V × (ACA)A
CAUTION
To avoid damage to the unit, do not short the output
terminal and do not input voltage to the output terminal.
Chapter 6
Applications
6.1 Determing the Power Factor
6.2 Connecting the Recorder
The 3181-01 measures active power, current and voltage.
The power factor of the equipment under measurement is
calculated from these measured values.
Thus to get the power factor, divide the measured power
by the product of voltage and current.
The 3181-01 has three analog output terminals on the
rear panel. They are for voltage, current, and power
which are always active simultaneously.
These can be
connected to the input terminals of a recorder. It enables
to observe and record the measured values.
Note that although the analog outputs of current and
power are 2 VDC/f.s., 2 VDC is output for 200 VAC input
in the voltage function only.