SECTION 2
SPECIFICATIONS
13
2.2.5 POWER FACTOR METER SPECIFICATIONS
Power factor is displayed as the ratio: kW / kVA. Display range and resolution is X.XXX. The Remote
interface may provide 3 digits of precision (digits to the right of the decimal point).
Accuracy is ± 1% of full scale over the full range of ambient conditions.
2.2.6 FREQUENCY DISPLAY SPECIFICATIONS
The programmed frequency is displayed as an indicator only. Internally, there are 3 frequency ranges,
each with a different resolution. The UPC auto-ranges based on the selected frequency.
Range:
20.00
– 5000 Hz.
Resolution
0.01 Hz.
0.1 Hz
1 Hz.
from 10.00 to 99.99 Hz
from 100.0 to 999.9 Hz
from 1000 to 5000 Hz
Accuracy
± 0.01% of full scale
over the full range of ambient conditions
2.2.7 WAVEFORM ANALYSIS
(Option: Harmonic Analysis and Synthesis)
WAVEFORM ANALYSIS is an optional feature which derives harmonic content values from any output
voltage or current waveform. Harmonics may be displayed on the front panel display or may be queried via
the Remote Interface. Total Harmonics (THD, RMS) and Even and Odd harmonic sums (EHD & OHD)
can be displayed. Harmonic analysis reports both magnitude and phase angle (relative to 0° of voltage) of
each harmonic for metered voltage and current waveforms.
Fundamental Frequency Range (Fout):
20-5000 Hz.
Harmonic Range:
2nd - 51st Harmonic.
Data Samples:
16-512 (128 default)
User specified:
Harmonic Content (Magnitude):
Accuracy: (see NOTE 1)
Resolution:
±
1% of Fundamental
0.1 %
Harmonic Phase Angle (see NOTE 2):
Accuracy:
Resolution:(0° to 359°)
2nd-20th: ± 1°
21st-51st: ± 2°
± 5°
± 10°
1°
Fout < 100 Hz.
Fout 100 - 500 Hz.
Fout >= 500 Hz.
Harmonic data is reported using a sine series expressed in polar format (magnitude and phase angle).
Each magnitude percentage is referenced to the fundamental which is always defined as having a
magnitude of 100%.
NOTE
: 1. When analyzing load current or voltage, use as much of the meter range as possible. The
specifications given apply to measured waveforms in which the peak values are at least 20% of
the meter range. Valid results can be obtained from lower magnitudes, but accuracy of the higher
order harmonics will deteriorate.
2. Phase angle accuracy is a guideline value only. It cannot be precisely stated because it varies
greatly with waveform type and magnitude. In general, it is most accurate with quasi-sinusoidal
waveforms, and poorest when resolving high order harmonics of pulse type waveforms and those
containing many discontinuities.
