Hioki PW8001-01, Instruction Manual

Page: 228 / 262

222
U7001 2.5MS/s Input Unit
Accuracy specifications
Apparent power
(S) measurement
accuracy
(Voltage accuracy) + (current accuracy)
±
10 digits
Reactive power
(Q) measurement
accuracy
For any condition except if
φ
= 0
°
or
±
180
°
(Apparent power accuracy)
±
{1−sin[
φ
+ (Power phase angle accuracy)] / sin
φ
}
×
(100% of reading)
±
[
√
(1.001 − λ
2
) −
√
(1 − λ
2
)]
×
(100% of range)
For
φ
= 0
°
and
±
180
°
(Apparent power accuracy)
±
[sin(Power phase angle accuracy)]
×
(100% of range)
±
(3.16% of range)
The symbol λ designates the display value of the power factor.
Power factor (
λ
)
measurement
accuracy
For any condition except if
φ
=
±
90
°
±
{1 − cos[
φ
+ (Power phase angle accuracy)] / cos
φ
}
×
(100% of reading)
±
50 digits
For
φ
=
±
90
°
±
cos[
φ
+ (Difference accuracy)]
×
(100% of range)
±
50 digits
The symbol
φ
designates the display value of the power phase angle.
Both of the above are specified when voltage or current of its range rating is inputted.
Waveform peak
measurement
accuracy
Voltage and current RMS value accuracy
±
1% of range
(300% of range is applied as a peak range)
Effects of temperature Add the following to the voltage, current, and active power accuracy within the range of
0
°
C to 20
°
C or 26
°
C to 40
°
C:
When Probe 1 is used
±
0.01% of reading per degree centigrade
Add another 0.01% of range per degree centigrade for DC.
When Probe 2 is used
Voltage:
±
0.01% of reading per degree centigrade
Add another 0.01% of range per degree centigrade for DC.
Current, active power:
±
0.03% of reading per degree centigrade
Add another 0.06% of range per degree centigrade for DC.
Common-mode voltage
rejection ratio
(Effects of common-
mode voltage)
When frequency is 50 Hz/60 Hz: 100 dB or more
When frequency is 100 kHz: 80 dB typical
Specified for CMRR when the maximum input voltage is applied between the voltage
input terminals and the enclosure for all measurement ranges.
Effects of external
magnetic fields
±
1% of range or less
(in a magnetic field of 400 A/m, DC or 50 Hz/60 Hz)
Effects of the power
factor on the active
power
For any condition except if
φ
=
±
90
°
±
{1 − cos[
φ
+ (Phase accuracy)] / cos
φ
}
×
(100% of reading)
For
φ
=
±
90
°
±
cos[
φ
+ (Phase accuracy)]
×
(100% of VA)
HIOKI PW8001A961-00