UPS Maintenance > Battery
Setting the
Battery Charging Method
to
Standard
or
Bulk
in the
Battery Primary Configuration
table
determines which parameters can be set or adjusted. See Figure 22 and Figure 23. The
Standard
charging
method is the default setting.
Standard Charging Method
Standard Charger Mode
Auto
: Charger stops charging when the battery is
fully charged.
Constant
: Charger switches to float mode when
the battery becomes charged. Float voltage is
0.4V lower than maximum charging voltage and is
temperature compensated.
Temperature Compensation
Adjustable from 0 to -6.0 in increments of 0.5.
(Factory default is -5 mV/°C/Cell)
Max Charger Current
Charging current can be set to 0 or any value
between 2A and maximum in increments of 1A
(maximum = 15A for FXM1100/FXM2000 and 10A
for FXM650). Charging current cannot be set to
1A. When charging current is set to 0A, charger
will stop charging.
Low Battery Warning
Battery voltage value that activates the low
battery warning alarm. For the range of 24V and
48V settings, refer to the Low Battery Warning
entry in Table I on page 65. The alarm is removed
when battery voltage is 2V above the warning
setting for a 48V battery, or 1V above the warning
setting for a 24V battery.
Peukert Number
Refer to Appendix A to calculate the Peukert
number.
Capacity
Rated capacity (Ah) of the battery shown on the
battery data sheet. Do not confuse the battery
capacity with the Peukert capacity.
Battery Open Circuit Voltage
Obtain this number from the battery data sheet.
The value is for a single battery, so for a 48V
system with 4 batteries connected in series,
multiply the number by 4. For a 24V system with 2
batteries connected in series, multiply by 2.
Figure 22 — UPS Maintenance: Battery,
Standard
charging method
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