User's Manual

Operation: C1SR Version
CENTRON Meter Technical Reference Guide 6-3
Electronic Detent
The C1SR module displays energy in increments of whole values of kWh. Standard
operation for this module is to accumulate both forward and reverse energy flow
in the positive direction. However, the C1SR personality module is available with
an electronic detent that will cause the meter to ignore reverse energy flow.
Therefore, if the meter is inverted, the registers will accumulate in the forward
direction only, thus providing uni-directional operation. At the time of order, the
C1SR module can be selected to have a detent register.
When the meter is undetented, both forward and reverse energy will be
accumulated. Therefore, the electronic load indicator will flash at a rate equal to
the energy consumption, regardless of the direction of the energy flow.
When the electronic detent is enabled, only forward energy flow will be
accumulated. Thus, the single load indicator will not flash, nor will the meter
accumulate when reverse energy flow is present.
Resetting Values
The ZRO-C2A Resetter zeros both the energy registers and tamper counters by
direct connection to the C1SR module See also The ZRO-C2A Handheld Meter
Resetter for the CENTRON C1S and C1SR Operating Instructions.
Transmission Scheme
A transmission cycle contains a wait period before and after each message burst
and a period of random silent time. The silent time is determined by the scaling
factor, which sets a minimum and maximum silent time between each
transmission cycle.
The transmission frequencies (within the 910-920 MHz band), the frequency
hopping pattern, and the time interval between transmission cycles are completely
random in nature. This randomness provides a method for avoiding interference
with transmissions from other devices. Figure 6.2 shows an example of the
CENTRON C1SR transmission cycle containing one message burst.
.
Figure 6.2 CENTRON C1SR Transmission Cycle