NF EC1000SA, Instruction Manual

Page: 156 / 283

5.4 MEASURE Screen
EC1000SA 5-26
5.4.6 Output harmonic current measurement
Output harmonic current measurement is enabled only in the AC-INT mode and when the frequency
setting is 50 Hz or 60 Hz.
When HC1, HC2, HC3, or HC4 is selected under “MEASURE” in the MISC menu, the harmonic
measurement window is displayed.
At that time, measurements other than output harmonic measurement are not performed. This
measurement does not conform to the IEC or other standards.
See “4.3 Measurement of Harmonic Current” .
•
Measurement range: To 40th harmonic of fundamental wave
•
Full scale: 15.00 Arms and 500.0%
•
Display resolution: 0.01 Arms and 0.1%
•
Measurement accuracy: at RMS value current up to 10th
±
(1% of rdg + 0.08 Arms)
at RMS value current from 11th up to 20th
±
(2% of rdg + 0.08 Arms)
at RMS value current from 21st up to 40th
±
(5% of rdg + 0.08 Arms)
(All in the case of reference value, 23
±
5°C)
Note
: This measurement does not conform to the IEC or other standards.
5.4.7 External synchronization frequency measurement
The frequency measured value is displayed only in the external synchronization mode (AC-SYNC or
AC+DC-SYNC).
See “4.7 Synchronize the Output with External Signal” .
•
Measurement range: 38.0 Hz to 525.0 Hz
•
Display resolution: 0.1 Hz
•
Measurement accuracy:
±
0.2 Hz (at 23
±
5°C)