Operation: C1SD, C1ST, and C1SL Versions
5-8 CENTRON Meter Technical Reference Guide
Energy and demand registers can be programmed to be displayed in any of the
specified formats (see Table 5.2).
Self Reading
The C1SD is capable of storing one block of self-read data consisting of kWh and
maximum kW. The TOU versions, the C1ST and C1SL, will store one block of self
read data consisting of kWh and kW for all rates when a self-read is performed.
Self-read data is displayable in Normal or Alternate mode.
A self-read is programmed to initiate in one of three ways:
• Read on manual or electronic demand reset. When a demand reset is initiated,
all energy and maximum demand quantities are immediately transferred to
non-volatile memory.
• Read on a programmed day of the month (C1ST and C1SL only). A specified
date (1st - 28th) can be programmed into the meter to indicate the exact day
that a self-read is to be performed. On this date at 00:00 hours, register
readings are transferred to nonvolatile memory.
If desired, an automatic demand reset can be performed after this self-read.
• Read on a programmable number of days since the last manual or automatic
demand reset (C1ST and C1SL only). If the selected number of days (1 to 150)
passes without a demand reset, a self-read is initiated.
If desired, an automatic demand reset can be performed after this self-read.
Table 5.2 Register Display Formats
3 Digits 4 Digits 5 Digits 6 Digits
Demand
X.XXX XX.XXX XXX.XXX
X.XX XX.XX XXX.XX XXXX.XX
XX.X XXX.X XXXX.X XXXXX.X
XXX XXXX XXXXX XXXXXX
X.X.X* X.X.X.X* XX.X.X.X* XXX.X.X.X*
Energy XX.X
XXX
XXX.X
XXXX
XXXX.X
XXXXX
XXXXX.X
XXXXXX
*indicates floating decimal point format
Only the first 28 days of the month can be selected since February has only 28 days.
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