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C.5.2
Discharging
The correct discharge rates are established through the capacities l
data is available, no more than the so established capacity may be used. To avoid deep
discharge and consequently the destruction of the battery, the battery must be shut off from
the user before reaching the run time related end point voltage:
Run time
> 3 h
1 - 3 h
20 min. - 1 h
< 20 min.
d
Caution
Risk of damage
The system should be reconnected only after mains power supply has returned. After
discharge, including deep discharge, the battery has to be recharged immediately.
C.6
Battery service and maintenance
C.6.1
Battery care
The battery is to be kept clean and dry as to avoid stray current creepage. For cleaning, use
a cloth moistened in a solution of bicarbonate of soda and water or just plain water. Do not use
cleaners of unknown solutions such as window or glass cleaners and solvents.
C.6.2
Inspection of the battery system
It is advisable to perform the following checks and record the findings every 6 months:
•
Visual inspection of batteries for cleanliness, terminal damage, container or cover damage
and evidence of overheating.
•
Check of float charge voltage of the battery system and of each individual battery block.
•
Check of surface temperature of the battery blocks.
•
Check ambient temperature.
A regular annual check and recording of the findings is mandatory for the fulfilment of the
warranty conditions and comprises the following checks:
•
All connection hardware should be retorqued to the value indicated in § 1 with a calibrated
torque wrench.
•
Repeat the semi-annual checks.
•
Ideally measure the voltage of the battery system and of the individual blocks with the
charger switched off.
To be performed only in the presence of the system supplier or their authorised
representative:
•
Record the block voltages at service load (capacity test).
End point voltage
1,80 V DC / cell
1,75 V DC / cell
1,67 V DC / cell
1,60 V DC / cell
= Q
/t. If no other
(disc.)
L
34
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