User's Manual

CENTRON Meter Technical Reference Guide 6-1
Chapter 6 Operation: C1SR Version
The SchlumbergerSema 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.
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 on an average of once per second. 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.
Figure 6.1 C1SR