MicroPower MTM - Charger; Options

13 (30)
Document no.
99-99-111
Version
6
Date
2003-10-16
Sign.
ToNo
and off functions such as the programming of currents as a percentage of I5 or I1,
monitoring of the battery current and voltage derivative, I0/U0 phase, etc.
3.7.3 Charger
The charger’s rated data, among other things, is programmed in this group (see the
rating plate on the charger). See also the table in section 5.1.
 Rated current.
Program this value in accordance with the rating plate on the charger. Entering an
incorrect value may damage the charger or cause a long charging time.
 Maximum current
Factory set.
 Mains code
This parameter tells the program what type of mains voltage the charger is connected
to. See the table in section 5.1.
Incorrect value gives incorrect function.
 Lower start limit, upper start limit.
The charger starts when a battery is connected if the battery voltage is between the
limit values of “lower start limit” and “upper start limit”. If there is no battery at all,
i.e. the voltage is less than 6 V, a “connect battery” message is displayed.
 System voltage code, system current code.
These parameters tell the program what voltage input is used and which shunt is
installed. Incorrect values mean that the charge currents and voltages are too high or
too low, which can damage the charger and battery.
See the table in section 5.1.
N.B.: if any of these parameters is changed, the corresponding measured value must
always be calibrated.
 System RI
To minimise the charging time, the MTM compensates for voltage drops in
secondary cabling and socket. The display shows the compensated value, i.e. the
voltage the battery is estimated to have. Specify the measured or estimated resistance
in the format 0.1 m. See also the table in section 5.1.
 Bridge type
Two types of thyristor bridges are used in MTM. Smaller chargers (up to 150A)
usually have a 3-pulse bridge. Chargers with a nominal current of 175A and above
usually have a 6-pulse bridge. These chargers are fitted with an extra Thyristor
Control PCB (see section 4.2). See the table in section 5.1.
3.7.4 Options
This group includes parameters which define which auxiliary equipment is fitted in the
charger. Acid circulation pumps, extra I/O cards and temperature sensors are examples
of such equipment.
 Acid circulation pump type, pump on, pump cycle, underpressure, overpressure
These parameters tell the program what type of pump is fitted, how pumping is to
take place (interval and length) and what pressure is to be considered normal. If the
pressure is outside of the approved range, the charging factor for a normal battery
(without acid circulation) is selected and an error message is displayed.