Glossary of Terms
84 CENTRON® Meter Technical Reference Guide
Demand Delay
Cold Load Pickup (CLPU). The programmable
amount of time required before demand calculations
are restarted after a power outage.
Demand Interval
The specified time over which demand is calculated.
Demand Reset
When all the current maximum demands are set to
zero.
Demand Subinterval
The smaller blocks of time that are used in rolling
demand calculations.
Demand Threshold
A programmed value that, when exceeded by
calculated demand, initiates a contact closure, a write
to a log, or a phone home event.
Display (LCD)
Provides a visual indication of the data accumulated
by the register.
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.
Error Codes
Monitor operation of the meter. Error codes are
available for display in Normal, Alternate, and Test
display modes.
Event Log
Log used to record historical events that occur in the
meter. The events that can be logged must be
configured via the PC-PRO+ Advanced programming
software.
Firmware
The computer program stored in a read-only memory
(ROM) or an erasable programmable read-only
memory (EPROM) integrated circuit.
Flash Memory
A type of EEPROM chip used for easy and fast
information storage. It is a solid-state storing device.
IDM
The Interval Data Message (IDM) contains
consumption data for timed intervals that can be used
for calculation of demand and time-of-use billing.
Last Season
The season immediately preceding the current season.
LCD
A solid-state Liquid Crystal Display (LCD) is used to
show power consumed as well as other metering
information.
LED
A Light-Emitting Diode (LED) is used to signal the
occurrence of an event or the presence of a pulse.
Load Profile
The functionality of a meter to accumulate pulses in
proportion to accumulated energy in programmed
intervals. Often referred to as Mass Memory.
Magnetic Switch
A solid-state or mechanical switch which is closed by
an external magnetic field.
Maximum Demand
The largest demand calculated during any interval
over a billing period. The Maximum Demand
quantity displayed in Test Mode is that value
calculated over the test interval only (this can differ
from the Normal Mode demand interval).
Mode Timeout
The amount of time the meter will remain in Scroll
Lock, Alternate Mode, Test Mode, Test Alternate
Mode, or Toolbox Mode before automatically
returning to Normal Mode. This time is
programmable.
Non-volatile Memory
See Flash Memory.
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