User's Guide
Power Transducer
Review I
KRON Instrumentos Elétricos
16
Bi-direction transducers
For measurement of co-generation systems, i.e., systems which in part of time
supply energy and in part of time consume energy are used transducers with bi-
direction output.
In a common transducer, with 4-20mAdc output, when we have an active power
whose signal is negative, it will not carry out measurement. The bi-direction model, on
the other hand, works with “two scales” in its output, one of them positive and the
other negative.
Bi-direction output example: 4..12..20mAdc
12mAdc = 0W
4mAdc = F.S. negative
20mAdc = F.S. positive
For the other signals, without suppressed zero, it is also possible the execution
of bi-direction type, however, the operation will be in this manner:
Bi-direction output example: -1..0..1mAdc
0mAdc = 0W
-1mAdc = F.S. negative
1mAdc = F.S. positive
