User's Manual

Operation: C1SD, C1ST, and C1SL Versions
CENTRON Meter Technical Reference Guide 5-5
Low power mode can be verified in one of the following ways:
• By observing that the minutes on battery counter does not increase during a
power outage.
• By observing the display during a power outage (from close range at an angle)
and verifying that the display does not show “on battry”.
See "Three Button Reset" on page 5-24 for instructions.
Displays
A nine-digit liquid crystal display, with a variety of annunciators, is provided on
these multifunction personality modules (see Figure 5.4).
Figure 5.4 Display
Six large digits are available to display all billing and informational data. Three
decimal points are provided for programmable resolution of billing data.
Three small digits in the upper left-hand corner of the display are used to provide
code numbers to identify any display item. These three digits are used along with
the six data digits to display ID numbers such as the meter serial number and user
fields.
There are three triangle segments in the bottom right corner of the display that
represent a watt disk emulator. This electronic load indicator will advance with
each pulse, since each pulse is equivalent to one watthour. Reverse power is
indicated by a reversal in the direction of the electronic load indicator.
Directly below the three code number digits is the Test mode annunciator (TEST).
This annunciator will flash on and off once per second whenever the meter is in
Test mode.
On the far left of the bottom line is the Alternate mode annunciator (ALT). This
annunciator will flash on and off once per second whenever the meter is in
Alternate mode.
To the right of the Alternate mode annunciator are the TOU rate indicators (A, B,
C, D, Total). These indicators correspond to the four programmable TOU and
TOTAL rate. The TOU rate indicators can be programmed to be displayed with the
appropriate energy and demand quantities. When an energy or demand quantity for
the currently active TOU rate (A, B, C, or D) is displayed, the corresponding TOU
rate indicator will flash on and off once per second.
To the right of the TOU rate annunciators is the kWh annunciator. This annunciator
can be programmed to display with any energy quantity. The kWh annunciator can
be programmed to display as kW with any demand quantity.
The EOI annunciator is located to the right of the kWh annunciator. This
annunciator will turn on for four seconds at the end of each demand interval (or at
the end of each subinterval when rolling demand is used).