Installation, Operation and Technical Manual Rectifier Technologies
158-1872-01 69 19-Feb-14
The Battery Discharge Test is a software function in the MCSU-4, which performs a
periodic, controlled battery discharge using the load to discharge the battery. The test can
be used to confirm capacity of the battery in the same way as a manual discharge using
an external load would, except the normal system load is used without disconnection.
While Battery Discharge Test is active, the “Home Screen” will have format
The system alarms Battery Discharge, Voltage Low, SMR Voltage Low and Low Load will
be suppressed, however SMR alarms will be shown in the SMR status.
To access the Battery Discharge Test parameters, enter the Batt menu. Use of DEC gives
faster access to the menus. The screens shown here are in order as INC key was used.
Time interval (in days) between consecutive tests. Setting
range 0 - 365. When set to zero, the automatic execution of
the test is disabled (the display shows “Off”). The test can
be activated manually from a PC running WinCSU-2 (from
CSU menu). Display messages from 2 to 6 will be shown
only if the test is enabled.
Time of the day at which the test should start. Programmed
in hours and minutes (24 hours format).
Time span during which the battery will be discharged.
Programmed in hours and minutes (between 5 minutes and
24 hours), step of adjustment 5 minutes.
Current of battery discharge, controlled by MCSU-4.
Programmable range 0A - 5000A. To ensure proper
operation of this function, the load supplied by the system
during the test must be greater by at least 10% than desired
battery discharge current. MCSU-4 will use the rectifiers to
support surplus load, leaving the battery to supply a user
defined amount of current to the load. If this parameter is
set to zero, the control function is disabled and the battery
will discharge under full load current.
Batt Disch Test
Current = Load
End voltage of the test. Battery voltage below which the test
will terminate if reached before desired duration time
expired.
MCSU-4 will restore normal operating parameters and start
recharging the battery. The test result will be “Fail”.
Programmable range depends on the system voltage:
24V system: 18V to 24V,
48V system: 36V to 48V,
110V system: 75V to 120V.
End capacity of the battery. Principle of operation the same
as described in par. 4. Programmable between 25Ah and
9995Ah
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