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Operation: CP1SD/T/L Version
CENTRON® Polyphase Meter Technical Reference Guide
83
Load Indication/Direction Annunciator
The CENTRON Polyphase meter is equipped with a Liquid Crystal Display (LCD) load
emulation indicator. The Load Emulator follows the Infrared Test LED. For each pulse of
the Test LED, the Load Emulator increments one segment. The operation of the Load
Emulator depends on the quantity being pulsed.
If the quantity being pulsed is “Delivered-Only”, then the Load Emulator scrolls to the
right when energy is being delivered and lights the left arrow when energy is being
received.
If the quantity being pulsed is “Received-Only”, then the Load Emulator scrolls to the
left when energy is being received and lights the right arrow when energy is being
delivered.
If the quantity being pulsed is “Delivered and Received”, then the Load Emulator
scrolls to the right when energy is being delivered and scrolls to the left when energy is
being received.
When the meter is in Toolbox mode, the Load Emulator does not follow the Test LED.
Instead, the operation of the Load Emulator depends on the quantity that is currently being
displayed. If the quantity being displayed is a Phase quantity, then the Load Emulator scrolls
to the right if energy flow on that phase is currently delivered or scrolls to the left if energy
flow on that phase is currently received. If the quantity being displayed is a Diagnostic
Counter, then the Load Emulator is turned off.
Figure 34: Load Emulator Segment Progression
Phase-Voltage Indication Annunciators
The CENTRON Polyphase meter is equipped with three LCD voltage indicator
annunciators. They are located in the lower left portion of the LCD display. Illuminated
annunciators (VA, VB, and VC) indicate active voltage for these respective phases.
Depending on how the user configures the meter, a loss of voltage may be indicated with
either a missing or flashing annunciator.