GW Instek APS-1102 User Manual - Manual (Page 151)

5.4 MEASURE Screen
APS-1102 Programmable AC/DC Power Source 5-25
5.4.3 Output power measurement
The output power values described below are always displayed.
a) Effective power
 Full scale: 1200 W
 Display resolution: 1 W
 Measurement accuracy: 2% of the full scale (at 23 5°C)
(when output is 100 VA or above)
b) Apparent power
Calculated as output voltage RMS value × output current
RMS value
 Full scale: 1400 VA
 Display resolution: 1 VA
 Measurement accuracy: ±2% of the full scale (at 23 ±5°C)
(when output is 100 VA or above)
c) Reactive power
Calculated as  apparent power 2 – effective power 2
 Full scale: 1400 Var
 Display resolution: 1 Var
 Measurement accuracy: ±2% of full scale (at 23 ±5°C)
(when output is 100 VA or above)
5.4.4 Load power factor measurement
Calculated by effective power/apparent power
This measurement is always displayed.
 Measurement range: 0.00 to 1.00
 Display resolution: 0.01
5.4.5 Load crest factor measurement
Calculated by (maximum values of positive peak current and negative peak
current )/effective power
This measurement is always displayed.
 Measurement range: 0.00 to 50.00
 Display resolution: 0.01