Liebert 1000kVA - Manual (Page 48)

Operation
42
System Status
The System Status screen displays the module Total Operating Hours, Enable Backlight and the Bat-
tery Cycle Monitor.
Battery Cycle Monitor—Module Only
Selecting the Battery Cycle Monitor gives you access to detailed information about the module’s most
recent battery discharge events. Periodic review of this data can give a good indication of battery per-
formance and expected life.
Each battery discharge cycle is put into one of four categories, depending on the length of the event:
• 0-30 Seconds Discharge
• 31-90 Seconds Discharge
• 91-240 Seconds Discharge
• Over 240 Seconds Discharge
Each discharge cycle is sorted by time duration and tagged with the following system parameters:
• System time and date
• Event Number
• Duration of cycle (seconds)
• Lowest DC Bus Voltage
• Highest DC Bus Current
• kW carried by the batteries at the start of cycle
• Battery Environment Ambient Temperature (when equipped with optional temperature sensor)
Up to 132 discharge cycle events can be stored at any given time. When the buffer approaches its
capacity, a warning message is broadcast via terminal and modem communication channels and a
complete listing of all records (in order of occurrence) is sent to the terminal port. If a serial printer is
attached to the terminal port (see 3.2.15 - Communication Interfaces), the operator can print a
hard copy of the report. If a printer is not available, a terminal emulation program can capture the
report to disk for later review or printing. Once the buffer is filled, new data will replace the old on a
first in, first out (FIFO) basis as new cycles occur.
To view this data, select the BATTERY CYCLE MONITOR option on the System Status screen. At
the next screen (see Figure 26), you can select either the Battery Cycle Monitoring Summary screen
or a screen showing detailed information on any one of the four categories of discharge (0-30 seconds,
31-90 seconds, 91-240 seconds and over 240 seconds).
Figure 26 Battery cycle monitor screen
CURSOR UP
CURSOR DOWN
CHOOSE
UP :
DOWN :
SELECT :
Enable
Enable
11
5
2
1
19
EXIT
Battery Cycle Monitor
Battery Temperature
Battery Cycle Monitoring Summary
0-30 Seconds Discharge
31-90 Seconds Discharge
91-240 Seconds Discharge
Over 240 Seconds Discharge
Total Since 02/4/95
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EXIT
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