GRAUPNER MC-22S

12
Operating notes
Operating notes
Charging the receiver battery
A wide variety of rechargeable 4.8 V NC and NiMH
batteries is available, varying in capacity. For safety
reasons always use ready-made battery packs from
the GRAUPNER range; never use dry cells.
There is no direct method of checking receiver batte-
ry voltage when operating a model.
For this reason it is important to make it a stan-
dard part of your routine to check the state of
your batteries at regular intervals. Don’t wait until
you notice the servos running more slowly than
usual before recharging the packs.
The charge lead, Order No. 3021, can be connec-
ted directly to the NC receiver battery for charging.
If the battery is installed in a model and you have in-
stalled one of the following switch harnesses: Order
No. 3046, 3934, 3934.1 or 3934.3, the battery can be
charged via the separate charge socket, or the char-
ge socket which is built into the switch. The switch on
the switch harness must be left at the “OFF” position
for charging.
Standard chargers
Order No. 6422 Minilader 2
Order No. 6427 Multilader 3
Order No. 6426 Multilader 6E*
Order No. 6428 Turbomat 6 Plus*
Order No. 6429 Turbomat 7 Plus*
Automatic chargers with special NiMH charge
programs
Order No. 6419 Ultramat 5*, **
Order No. 6410 Ultramat 10*, **
Order No. 6412 Ultramat 12*, **
Order No. 6414 Ultramat 14*, **
Order No. 6417 Ultramat 25*, **
Order No. 6416 Ultra Duo Plus 30*, **
* To recharge the mc-22s system you will also need the transmit-
ter charge lead, Order No. 3022, and the receiver battery char-
ge lead, Order No. 3021.
** 12 V power source required.
Please refer to the main GRAUPNER FS catalogue
for an overview of batteries, battery chargers and
measuring equipment.
General notes on battery charging
• Keep to the recommendations provided by the ma-
nufacturers of the charger and the battery at all ti-
mes.
Observe the maximum permissible charge current
stated by the battery manufacturer. To avoid dama-
ge to the transmitter circuitry, the maximum char-
ge current for the transmitter battery is 1.5 A; limit
the charge current to this value on the charger.
If you wish to charge the transmitter battery at a
current higher than 1.5 A, it is absolutely essen-
tial to remove the pack from the transmitter for
charging. If you ignore this, you risk damaging the
transmitter circuit board by overloading the tracks
and / or overheating the battery.
• If you are using an automatic battery charger, car-
ry out a series of test charges to ensure that the
automatic charge termination circuit works correct-
ly with your battery.
This applies in particular if you are recharging the
standard NiMH battery using an automatic charger
designed for NiCd batteries.
You may need to adjust the Delta Peak trigger vol-
tage, if your charger provides this option.
• Do not discharge the battery or carry out a battery
maintenance program via the integral charge so-
cket. The charge socket is not suitable for this ap-
plication.
• Always connect the charge lead to the charger
fi rst, and only then to the transmitter or receiver
battery. Observing this rule eliminates the danger
of accidental short-circuits between the bare con-
tacts of the charge lead plugs.
• Never leave batteries on charge unsupervised.
Polarity of recei-
ver battery