Bulletin No. 3020IM9503R6/98 Power Meter
December 1998 Chapter 10—Logging
1998 Square D All Rights Reserved 69
CHAPTER 10—LOGGING (PM-650 ONLY)
ALARM LOG
The PM-650 has an alarm log viewable only from the power meter display.
The alarm log stores the last 10 alarms that occurred and indicates whether
each of those alarms has been acknowledged. The alarm log and event log are
two separate logs.
EVENT LOG
Power meter model 650 also provides an event log to record onboard events.
(An event occurs when the pickup or dropout setpoint of an alarm is reached;
see Chapter 9 for more information.) The event log holds a user-configurable
number of alarm events in FIFO (first-in-first-out) or Fill/Hold order. The
event log is factory pre-configured to hold 20 events. Using POWERLOGIC
application software, you can upload the event log for viewing, save it to disk,
and clear the power meter’s event log memory.
DATA LOG
The PM-650 is equipped with nonvolatile memory for storing meter readings
at regular intervals. One data log is provided for user configuration. The
following items can be configured for the data log file:
• Logging interval—1 minute to 24 hours in 1 minute increments
• Offset time
• First-In-First-Out (FIFO), or Fill & Hold
• Values to be logged
The data log is pre-configured to log each of the following hourly:
• Per-phase quantities: present current demand (including neutral) and
line-to-line voltages
• 3-phase quantities: true power factor, kW demand total, kVAr demand
total, and kVA demand total
For instructions on setting up and clearing data log files, refer to the POWER-
LOGIC application software instruction bulletin.
ALARM-DRIVEN DATA LOG ENTRIES
Using POWERLOGIC application software, you can select an alarm condition
such as “Overcurrent Phase A” and set up the power meter to force data log
entries into the log file each time the alarm condition occurs.
STORAGE CONSIDERATIONS
The PM-650 has 1K of nonvolatile memory allocated for the event log and the
data log. See Appendix J—Calculating Log File Size for additional informa-
tion on the event and data logs.
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