Operation: CP1SD/T/L Version
46
CENTRON® Polyphase Meter Technical Reference Guide
All “PhA”, “PhB”, “PhC” quantities are displayed with a fixed decimal and no
leading zeros. While displaying phase information, the load emulator cycles at a
fixed rate in the direction of energy flow for that phase. The Load Emulator is not
displayed while the diagnostic counters are displayed. The diagnostic counters are
displayed with leading zeros (000-255).
The per-phase Volt and Amp readings are Root-Mean-Square (RMS) values which are
updated every second. The voltage and current angles are updated every five seconds. The
direction of the load emulator is the same as the direction of energy flow for the phase being
displayed. If any quantity is undefined due to the meter’s service, the per-phase information
for that quantity will not be displayed.
If the magnitude of the current for that phase is too low, the current magnitude and angle for
a particular phase (A, B, or C) are displayed as zeros.
The SiteScan diagnostic counters represent the number of times each diagnostic error
occurred since the last time the counters were reset.
The diagnostic counters range from 0 to 255 and can only be reset to zero through the PC-
PRO+ Advanced programming software.
Upon completion of the Mode Timeout period, the meter automatically returns to the
Normal Display Mode.
Test Display Mode
The Test Mode can be accessed from either the Normal, Alternate, or Toolbox Mode by
removing the meter cover and pressing the Test button.
To activate this mode with a programming device, refer to the appropriate software user’s
manual.
The Test Mode annunciator (“TEST”) is displayed while the D/T/L Register is in Test
Mode.
Activating Test Mode causes all billing data to be transferred to non-volatile memory. Upon
entry of Test Mode, if any calculated demand values of the present interval are higher than
the stored maximum demand values, the new values are stored as maximum demands. All
Test Mode program parameters are then retrieved from non-volatile memory for use in Test
Mode. The parameters are demand test interval length, number of subintervals, and test Kh.
Each is independent from those specified for Normal Mode. Activating the demand reset
while in Test Mode initializes the demand test interval. (This interval is not synchronized to
the top of the hour.)
To exit Test Mode and place the register in Normal Mode, perform one of the following:
Press and then release the manual Test Mode button
a second and a third time
. The
“TEST” annunciator will go away.
Wait for selected Test Mode timeout to occur; if the meter is inadvertently left in Test
Mode, it will return to Normal Mode at the completion of Mode Timeout.
Removal of power for a brief period will force Test Mode to end.
