User's Manual

CENTRON Meter Technical Reference Guide 6-1
Chapter 6 Operation: C1SR Version
The Itron CENTRON C1SR is a one-way, unlicensed Radio Frequency (RF)
Personality Module that attaches to the CENTRON meter base (See Figure 6.1). It
offers a cost-effective solution for the endpoints in automatic and off-site meter
reading applications. The CENTRON C1SR operates similar to the existing R300
module that is utilized by the J5 electromechanical meter.
Standard Consumption Message (SCM)
Utilizing the 96-bit Itron® Standard Consumption Message protocol (SCM), the
C1SR provides the energy (kWh) consumption, module ID number, tamper
indications, meter type, and error checking information in each radio frequency
transmission. Within the 96-bit SCM, 26 bits are allocated to the module ID number
for meter identification (also referred to as ERT ID number). As of October 15,
1999, all CENTRON C1SR meters utilize 26-bit identification numbers.
The C1SR uses frequency hopping and transmits within the unlicensed 910 to 920
MHz band. In order to avoid interference from other devices, the transmission
frequencies and time interval between transmission cycles are completely random
in nature.
The C1SR is factory programmed with tuning information, module ID, tamper
indicators (ITPR and RTPR), meter type, energy consumption, and scaling factor.
The program and all register information are stored in non-volatile memory in the
event of a power outage. Upon power restoration, all of the information in the non-
volatile memory is restored to the appropriate registers.
Interval Data Message (IDM)
The Radio Frequency Personality Module allows meter data to be collected
automatically, helping to save time, improve reliability, increase accuracy, and
ensure data security.
The R300 IDM is a Radio Frequency Personality Module based on the CENTRON
solid-state metering platform. Kilowatt-hours and tamper data are reported
through RF transmissions. The R300 IDM module provides both baseline and
advanced data collection functionality, including interval data recording and
enhanced tamper reporting capability. The R300 IDM delivers the ERT Standard
Consumption Message to any of Itron’s radio-based data collection technologies,
including handheld computers (OMR), a vehicle-based Mobile AMR unit such as
the Mobile Collector, or a network data collection solution such as the Itron Fixed
Network or MicroNetwork. In addition, the R300 IDM is also capable of delivering
the Interval Data Message to the Itron Fixed Network AMR system to calculate
ANSI standard demand, time-of-use, and load profiling information.