Operation: C1SR Version
CENTRON Meter Technical Reference Guide 6-5
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Figure 6.3 CENTRON C1SR Transmission Cycle
FCC Regulations
The C1SR communicates in the unlicensed, 910-920 MHz band governed by the US
Code of Federal Regulations (CFR) Title 47, Part 15 Radio Frequency Devices, Sub
Part C Paragraph 249 Intentional Radiator.
Tamper Detection
The CENTRON C1SR features the Itron patented method of tamper detection that
senses both meter removal and meter inversion. The removal tamper (RTPR)
increments a counter each time the meter is abruptly removed from a live meter
socket. The tamper counter utilizes a tilt switch to detect when the meter is
removed from a meter socket.
The inversion tamper (ITPR) increments a separate counter each time the meter
senses reverse power flow caused by meter inversion. The metrology board senses
reverse power flow and sends this status to the C1SR module. Although the C1SR
increments an inversion counter when reverse power flow is detected, the meter,
when undetented, will still accumulate the energy consumption in the positive
direction. Each of these tamper indications, along with the kWh consumption, is
then transmitted through the radio frequency transmission.
Changes or modifications not expressly approved by Itron could void the users authority
to operate the equipment.
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