Connecting The Charger; Preparing The Battery; Charging Process - Bosch ML1208E Operating Instructions Manual

1. Scope of application of the charger
All 12 V batteries (standard
motor vehicle starter batteries, boat batteries and batteries from
other units (e.g. lawn mowers and hedge shears etc.) with the
capacity of no less than 5 Ah can be charged. As battery test
indicator for batteries with the following capacity: 24 to 66 Ah.
As work lamp and buffer operation.
This device is not suitable for installation as it would
!
become too hot.
2.

Preparing the battery

2.1 Unscrew all screw-plugs of standard batte-
ries.
Battery acid is highly corrosive! Immediately remove
acid splashes from clothing or skin with soap suds and
!
rinse with large amounts of water. Immediately rinse acid
splashes in the eye for approximately 15 min. and then
consult a doctor.
2.2 Check the fluid level of standard batteries.
If required, top up with distilled water. Approximately 5 mm of
the battery's lead plates must be covered with fluid.
For protection of the charger:
● Do not place the charger in moist rooms and
● do not place it on a heated base.
● Do not use the charger at ambient temperatures of more
than 35 °C.
● Protect it against splash water-and
● Do not cover up the ventilation slots
during charging.
Charging gases are explosive! Do not smoke near
batteries. Avoid naked flames and damp all sparks
when handling cables and electrical equipment. For
!
this reason, it is absolutely necessary to keep to the
sequence described in „Connecting the charger.".
and maintenance ) such as
3

Connecting the charger

1. Check that the charging voltage agrees with the battery
voltage.
2. Connect the charger terminal to the battery poles
Do not confuse poles! Connect the negative terminal (—)
to the negative pole (—) and the positive terminal (+) to
!
the positive pole (+).
3. Only then plug the main plug into the circuit and set the
switch on the unit to the (I) (the red LED in the centre lights
up)
4. When disconnecting the battery follow the sequence vice-
versa.
4.

Charging process

Only intact batteries may be charged. If one battery cell is de-
fective, the electronic device can no longer effect control.
The yellow LED lights up approximately 30 see/after the start
of charging.
Flashing light signifies: continue charging.
Continuous light signifies: the charging operation can be ter-
minated.
This only applies when a battery is being charged without
connected loads. As a rule, the LED will flash when loads are
connected. In this case, the information indicated does not ap-
ply. When batteries are charged with loads connected (buffer
operation) the maximum current of the load must not exceed
5.6 A - 0.013 x battery capacity (e.g., for a 84 Ah battery, ap-
proximately 4.5 A = approximately 55 W).
4.1 Particular advantage: Electronic regulation in
accordance with iwu characteristic
The battery cannot be overcharged. When the switch is set to
, it can remain connected to the charger for several weeks
without supervision. The electronic regulation circuitry protects
the unit in the event of overload, shorting of the terminals and
direct polarity. A malfunction is indicated by the bottom red
LED.
In order to avoid extreme gas formation, only load at higher
ambient temperatures (more than 30 °C) and with older batte-
ries with the switch set to
of all remove the plug from the socket and then disconnect the
pole terminals. When the switch is set to
necessary to terminate charging when the battery is full!
. This extends the charging, first
, it is absolutely
5