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Operation: C12.19 C1SD, C1ST, and C1SL Versions
44 CENTRON® Meter Technical Reference Guide
Modes of Operations
When the C12.19 C1SD/T/L modules are powered, they automatically enter the normal
display mode, perform self-diagnostics, and display any appropriate error codes. If no error
codes are detected, an
unprogrammed module will flash " nordiSP" followed by Segment
Test . A programmed module will scroll through the Normal display sequence, displaying
each selected quantity, annunciator, and code number for the programmed duration.
The C12.19 C1SD/T/L modules each have three modes of operation:

Normal

Alternate

Test
Each display mode has a separate list of items (quantities) in which it can display. The
modules can display a maximum of 80 items total for the three modes of operation. The
displayable quantities are configured through PC-PRO+ Advanced.
Normal Mode
In Normal mode, the module display automatically sequences through the programmed
display items in the programmed sequence. Each item is displayed for the program-specified
period (from 1 to 15 seconds), followed by a brief pause. Annunciators are available for
selected quantities. Only the annunciator appropriate to the selected item can appear while
its data is displayed. Each display can have a maximum of 3 alphanumeric characters for
identification. Valid entries are A-Z, a-z, and 0 through 9.
The meter will continue to operate in Normal mode until power is disconnected, the
Alternate display sequence is initiated, Test mode is selected, or a fatal error condition
occurs.
Alternate Mode
The Alternate mode provides an additional set of customizable display items that are not
typically used for billing applications. The Alternate mode is accessible only from the
Normal mode when activated using either the magnetic switch or a meter programming
device. Use a magnet to activate the Alternate mode. Place a magnet near the switch located
at the 9 o'clock position on the side of the module. The magnetic switch can be accessed
with the meter cover in place. To activate the Alternate mode with a programming device,
refer to the PC-PRO+ Advanced documentation. Immediately upon activation, Alternate
mode is indicated by a flashing
ALT annunciator. The ALT annunciator will not appear
unless an Alternate mode display has been programmed.
Once the Alternate mode has been selected, the display will sequence through the program
items until the programmed mode timeout expires. The quantities displayed are selected
during programming and have the same display timing as in Normal mode. Like the
displays in Normal mode, each display in Alternate mode can have maximum of 3
alphanumeric characters to identify each item. Valid entries are A-Z, a-z and 0 through 9.
The operations performed in Normal mode are identical to those in Alternate mode.