YOKOGAWA WT200 User Manual page 65

6.1 Integrator Functions
Integration Methods
6-2
Continous Integration Mode (Repeat Integration)
• Integration starts:
• after having pressed the START key;
• when the elapsed time of integration reaches the integration timer preset time, the
integrated value and elapsed time of integration are reset automatically and
restarted immediately.
• Integration stops:
• when the elapsed time of integration reaches the integration timer preset time ;
however, the integrated value and elapsed time of integration are reset
automatically and restarted immediately;
• after having pressed the STOP key;
• when the integrated value reaches the maximum of 999999 MWh/MAh, or when
the integrated value of negative polarity reaches –99999 MWh/MAh;
• Integration holds: the elapsed time of integration and integrated values at the point
where they reached the maximum or at the point where the STOP key was pressed
will be held until the RESET key is pressed.
Integrated
value
Elapsed time
of integration
Integration Integration
timer preset timer preset
time time
Start
Each display update interval (250 ms) the apparent power values or current values are
added to the integrated values, and will be time converted. The integration equations
are as follows.
Power integration
t
W
i
Wi: Active power between display update interval
4 × 3600
t: Elapsed time of integration
T=0
Current integration
t
A
i
Ai: Current value between display update interval
4 × 3600
t: Elapsed time of integration
T=0
Hold
Hold
Integration
timer preset
time
Stop Reset
IM 253421-01E