YOKOGAWA WT310EH - Page 67

4-13
IM WT310E-01EN
Measuring Power
1
2
3
4
5
6
7
8
App
Index
A
2
÷B:TheresultofdividingthesquareofthevalueofdisplayAbythevalueofdisplayBis
displayed.
 Whencomputingresistance(R)
Computation example:
U1rms P1
R =
(U1rms)
2
P1
Any
Display A Display B Display C Wiring System
U1
I1
Power supply
Load
Average Active Power during Integration (AV P)
The average active power within the integrated period is computed. This instrument determines the
average active power by dividing the watt hour (integrated active power) by the integration time.
Average active power during integration (W) =
Elapsed integration time (h)
Watt hour (Wh)
Equations and Displayed Values for the Average Active Power during Integration
• AVP1:Theresultofdividingthewatthourofelement1(WP1)bytheelapsedintegrationtimeis
displayed.
• AVP2:Theresultofdividingthewatthourofelement2(WP2)bytheelapsedintegrationtimeis
displayed (WT333E only).
• AVP3:Theresultofdividingthewatthourofelement3(WP3)bytheelapsedintegrationtimeis
displayed (WT332E and W333).
• AVP4:TheresultofdividingthewatthourofelementΣ(WPΣ)bytheelapsedintegrationtimeis
displayed (WT332E and W333).
* WatthourWPΣvariesdependingonthewiringsystem.Theequationsforcomputingthevalue
are the same as those listed in section 4.1 when “P” is replaced with “WP.”
Note
This computation function is only valid during integration (during integration or after integration has been
aborted). If you reset integration, the watt hour and elapsed integration time values become zero, and the no
dataindication(------)isdisplayed.Fordetailsaboutintegration,seechapter5.
4.5 Displaying the Efficiency (WT332E/WT333E only), Crest Factors, the Results of Computations Using
Basic Arithmetic, and Average Active Powers