Micro Star 1000
6
Special notes regarding the discharging of Graupner LiPo batteries:
A continuous current of around 6C represents no major problem for any Graupner LiPo battery. If you wish to use
higher discharge currents, please refer to the specifications printed in the catalogue.
Discharging LiPo packs to a point below 2.5 V per cell causes permanent damage to the cells, and must there-
fore be avoided at all costs. This means that you must switch the motor off the moment you detect a significant
decline in motor power. If the individual cells are at different voltages when discharged, the speed controller’s
low-voltage cut-off could be triggered too late, with the result that individual cells might be discharged to an
excessively low level.
Short-circuits must always be avoided. Permanent short-circuits will inevitably wreck the battery, and may also
cause high temperatures and a fire.
The temperature of the battery during the discharge process must never exceed 70°C. If you find that the pack
gets too hot in use, it is imperative that you improve the battery cooling measures, or reduce the rate of dis-
charge. The pack’s temperature can easily be checked using the Infra-Red Thermometer, Order No. 1963.
Supplementary handling notes
Avoid short-circuits:
Never short-out a LiPo battery. ‘Shorts’ allow very high currents to flow, which in turn cause the cells to heat up. This
will lead to loss of electrolyte, gassing or possibly even an explosion. When handling Graupner LiPo batteries you can
avoid the risk of short-circuits by keeping the packs well away from any conductive surface or component.
Mechanical strength of the foil casing:
The laminated aluminium foil enclosing each cell can easily be damaged by any sharp object, such as a needle, pin,
knife, nail, motor terminal or similar object. Foil damage renders the battery unusable. For this reason the battery must
be installed in the model in such a way that the pack cannot be distorted or damaged even if the model crashes. Re-
member that the battery could burst into flames if short-circuited.
The foil casing can also be damaged by temperatures above 70°C, causing the cell to leak. This may result in loss of
electrolyte, rendering the battery unusable. If this should occur, be sure to dispose of the battery in the proper manner.
Mechanical shock:
In mechanical terms LiPo batteries are not as robust as batteries consisting of metal-cased cells. Always avoid subject-
ing these packs to mechanical shock such as dropping, striking, bending, cutting, tearing, deforming or drilling into the
laminated film foil. Never bend or twist a LiPo battery, and do not exert pressure on the battery or its connections.
Handling the cell terminals:
Please note that the battery terminals are not as robust as those of other battery types. This applies in particular to the
aluminium tags, which can easily break off. Never solder directly to the contact tags, as the conducted heat may dam-
age the cells.
Cell connections:
It is not permissible to solder directly to the battery cells.
Direct soldering may cause heat-induced damage to the battery components such as the separator or isolator.
The only approved method of making connections to the battery terminals is industrial spot-welding. If a wire is missing
or torn off, a professional repair by the manufacturer or distributor of the cells is the only possible recourse.
Replacing individual battery cells:
Individual LiPo cells may only be replaced by the manufacturer or distributor. This intervention must not be attempted
by the user.
Do not re-use damaged cells:
Damaged cells must not be re-used under any circumstances.
Typical signs of damaged cells are: damage to the foil case, cell distortion, a smell of electrolyte or actual escaping
electrolyte. If you detect any of these indications, you must not re-use the battery.
Damaged or otherwise unusable cells constitute toxic waste. It is essential to dispose of them in the proper manner
General warnings
These batteries must not come into contact with fire or ashes. The cells must not be allowed to contact fluids such as
fresh water, salt water or drinks. Avoid contact with liquids of all types. Individual cells and batteries are by no means
toys, and must never be allowed to get into the hands of youngsters. Store cells and batteries well out of the reach of
children. Batteries must not be left within reach or in the vicinity of babies or toddlers. If a child should swallow a bat-
tery, call for a doctor or emergency medical assistance without delay. Batteries must not be placed in a microwave
oven, nor subjected to pressure: the results may be smoke and fire or worse.
Never attempt to dismantle Li-Po cells. Taking a battery apart can cause internal short-circuits, which could result in
gassing, fire, explosion and other problems.
The electrolyte and electrolytic fumes are injurious to health. Avoid direct contact with the electrolyte at all costs. If the
material gets in your eyes, on your skin or other part of your body, it is essential to wash the affected area immediately
with copious amounts of clean water. Consult a doctor as soon as possible thereafter.
Batteries installed in a device should always be removed from the apparatus if it is not to be used again in the immedi-
ate future. Always switch off such devices after use to avoid discharging the cells to a dangerous level. Recharge the
batteries in good time. Store batteries on a non-flammable, heat-resistant and non-conductive surface. If you allow a Li-
Po battery to become deep-discharged, it will inevitably be ruined, and must not be used again.
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