ITRON Centron, Technical Reference Manual

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Glossary of Terms
CENTRON® Meter Technical Reference Guide 85
Normal Mode
One of the four operating modes of the meter. It
includes all routine meter operations.
Optical port
Optical interface located on the face of the meter. The
meter can be programmed and communicated with
through the optical port.
Register Multiplier
A programmable value which is used in calculations
of displayed energy and demand readings. This can
be used by setting the register multiplier equal to the
CT ratio times the PT ratio of the installation.
Rolling Interval Demand
A calculation of maximum demand derived from the
moving average of the smaller consecutive
subintervals.
RS-232/RS-485
Accepted industry standards for serial
communications connections. This Recommended
Standard (RS) defines the specific lines and signal
characteristics used by serial communications
controllers to standardize the transmission of serial
data between devices.
SCM
The 96-bit Itron® Standard Consumption Message
protocol (SCM) 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).
Season
A programmable amount of time that a rate schedule
is in effect. Season start dates are programmed in the
format MM/DD (Month/Day).
Self-reading Registers
Register data that is captured in the meter at a
programmed interval of time and is stored in non-
volatile memory.
Sliding Window Demand
See Rolling Interval Demand
Test Mode
One of the four modes of register operation. It allows
testing of the register without altering billing data.
Time-of-Use (TOU)
A metering method which records demand during
selected periods of time so consumption during
different time periods can be billed at different rates.
VT Ratio
The voltage transformer ratio to use for viewing
voltage quantities for a service point.
Electronic Detent
Programming electronic detent prevents received
energy from accumulating in the delivered energy
register. When detent is enabled, the received energy
is accumulated in a separate register.