Nortec UL60 - Program 410: Maintenance Pb Battery Sealed MIL

9 Tabular overview of the program procedures Maintenance
© Nortec Electronics 2018 87
9.5.1 Program 410: Maintenance Pb battery sealed MIL
10: Pb battery sealed MIL
 select Batteryprocessing: 
P4: Maintenance
Enter:
 Nominal voltage
 Rated capacity
Step 1:
Discharging with C
5
until a voltage of 1.5 V is reached.
Step 2:
In case battery voltage is below 2.15 V × number of cells:
Precharge with 2.4 V × number of cells until charging current 0.4 C
1
is reached.
Step 3:
I-charge with 0.4 C
1
until charging voltage of 2.4 V × number of cells is reached.
Step 4:
U-charge with 2.4 V × number of cells until charging current is decreased to 0.02 C
1
.
Step 5:
Discharging with C
5
to 1.5 V for each cell. The here detected capacity will be used to ascertain the
effective capacity.
Step 6:
I-charge with 0.4 C
1
until the charging voltage of 2.4 V × number of cells is reached.
Step 7:
U-charge with 2.4 V × number of cells until charging current is decreased to 0.02 C
1
.
End of program
Display Battery evaluation:
C>90%:BATTERY OK
or
C>70%:BATTERY FOR UNCRITICAL USE
or
C<70%:BATTERY WITH RECORD TAKE DISCHARGED BATTERY OUT OF SERVICE
Time monitoring:
Precharge maximum 2 hours, I- and U-charge maximum 8 hours, capacity maximum 1.5 × C