PC5 SERIES WATT TRANSDUCER CALIBRATION MANUAL
Page 2
the apparent power.
Figure 1a
Figure 1b
Figure 1c
The Graphs at the left illustrate loads with
the following characteristics:
•
Top Figure 1a – Load at unity power
factor.
•
Middle Figure 1b – Inductive load at 0.5
power factor.
•
Bottom Figure 1c – Pure inductive load or
0 power factor.
In all three cases the dashed line represents
the real average power or the work being
done by the load.
The AC ripple, which represents apparent
power, is eliminated using the simple filter
circuit shown below.
200 OHMS
100 ufd
Input
Output
Figure 2
In all cases the base outputs are filtered and
amplified to provide 0 to 1mA, 0 to 5 volts, 0
to 10 volts or 4 to 20mA's by adding the
option letter to the end of the model number
when ordering the transducer. Base models
(models with non-amplified outputs) are no
longer available from Ohio Semitronics, Inc.
except by special request.
2
2
p t
( )
A
6.28
0
t
0
1.57
3.14
4.71
6.28
2
1.33
0.67
0
0.67
1.33
2
2
2
p t
( )
A
6.28
0
t
0
1.57
3.14
4.71
6.28
2
1.33
0.67
0
0.67
1.33
2
2
2
p t
( )
A
6.28
0
t
0
1.57
3.14
4.71
6.28
2
1.33
0.67
0
0.67
1.33
2
