H-tronic AL800 compact Handbuch Seite 13

ches off in the conservation-charging
mode or if the charge current falls under
80mA.
The device is characterised by the follow-
ing properties:
• short-circuit and reverse-polarity pro-
tection
• Constant charging end voltage
• No charging if battery is connected with
reverse-polarity
• Charging is only carried out if the batte-
ry is connected correctly
• Visual display, for net, charging and
reverse-polarity
This article was verified according to the
EG-regulation (89/336/EWG (EMVG as of
09/11/1992, electromagnetic compatibi-
lity) and complies with the legal regula-
tions. Any modification of connection or
use of other accessories other than the
ones specified, terminates the approval.
As opposed to common chargers, the
charge current of this automatic charger
does not represent a precise value and
depends on various factors. This includes
e.g. the charge condition of the battery,
the battery age, the battery type or capa-
city. In addition, it is important how much
the battery was discharged before. If the
battery was extracted a lot of current, a
high initial charge current will take place
at the beginning (max. 0,8 A) that will
diminish after a short time. This means
with increasing voltage of the battery, the
charge current decreases.
The following graph demonstrates this
behaviour.
Charging curve AL 800 time
The charging time, until the charging end
voltage is reached, depends on several
parameters, e.g.
• the capacity (Ah, the bigger the longer
the charging time)
• the battery type
• the charging condition of the battery
(full, partly charged, flat),
• the ambience temperature
• the general condition (age) of the bat-
tery.
The charging time is based on the above
parameters and can roughly be calcula-
ted according to the following formula (for
a rough time estimation):
Capacity of the battery in Ah
Charging time (in hours [h]) = ------- x 1,4
Example: Lead-gel-battery 12 Ah, flat
12 Ah
--------x 1,4, the charging time amounts
0,8 A to approx. 21 h
Towards the end of the charging process
(battery is full), the yellow LED "loading"
usually switches off. Older or high-capa-
city batteries may show an extremely high
self-discharge (approx. 1% of the battery
capacity) and the plug connector may
not recognize this elevated conservation
charge current as a completed charging
cycle (yellow LED-display is not swit-
ched off). In this case the plug connector
works as a buffer to compensate the self-
discharge of the battery.
Generally, as for more recent batteries,
the LED switches off once the battery if
fully charged. Batteries of different capa-
cities can be charged, bigger batteries
have a longer charging time whereas
13
Charge current 0,8A