Bedienungsanleitung Graupner ULTRA TRIO PLUS 16 - 6469 (Seite 30 von 107) (Deutsch, Englisch, Französisch, Italienisch)

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3. General notes on using the charger

Charging batteries

When a battery is charged, a particular quantity of electrical energy is fed into it. The charge quantity

is calculated by multiplying charge current by charge time. The maximum permissible charge current

varies according to the battery type, and can be found in the information provided by the battery ma-

nufacturer.

It is only permissible to charge batteries at rates higher than the standard (slow) current if they are

expressly stated to be rapid-charge capable. The STANDARD CHARGE CURRENT is 1/10 (one tenth)

of the cells’ nominal capacity (e.g. for a 1.7 Ah pack the standard charge current is 170 mA).

Connect the battery to be charged to the charger output sockets using a suitable charge lead (red •

= positive terminal, black = negative terminal).

Be sure to read the information provided by the battery manufacturer regarding charging methods, •

and observe the recommended charge currents and charge times. Do not attempt to fast-charge

batteries unless they are expressly stated to be suitable for the high currents which this charger

delivers.

Please bear in mind that new batteries do not reach their full capacity until they have undergone •

several charge / discharge cycles. You should also be aware that the charger may terminate the

charge process prematurely when connected to new packs, and batteries which have been deep-

discharged.

A Ni-Cd pack will normally be warm at the end of a rapid-charge process, but if you notice that one •

cell of the pack is much hotter than the others, this may well indicate a fault in that cell. Such packs

could fail completely without warning, and should not be used again. Dispose of the battery safely,

preferably taking it to a toxic waste disposal centre.

Ensure that all connectors and terminal clamps make good, sound contact. For example, if there •

is a brief interruption due to an intermittent contact, the result is inevitably a malfunction such as a

restart of the charge process, which would result in the pack being massively overcharged.

A common cause of malfunctions is the use of unsuitable charge leads. Since the charger is • incapable

of detecting the difference between a pack’s internal resistance, cable resistance and connector

transfer resistance, the ﬁ rst requirement if the charger is to work perfectly is that the charge lead

should be of adequate conductor cross-section and should be not be more than 30 cm long Good-

quality connectors (gold-contact types) must be ﬁ tted to both ends.

Charging transmitter batteries•

A battery installed in a radio control transmitter can usually be recharged via the integral charge

socket which is ﬁ tted to the transmitter itself. Transmitter charge sockets generally include a diode

which prevents reverse current ﬂ ow. This prevents damage to the transmitter electronics should the

charger be connected with reverse polarity, or if a short-circuit occurs between the bare ends of the

charge lead connectors. However, a transmitter battery protected in this way can only be charged

by the ULTRA TRIO PLUS 16 if the diode is by-passed. Please read your transmitter operating

instructions for information on how to do this. The stated maximum charge current for the transmitter

battery must never be exceeded. To avoid possible damage to the internal transmitter components

due to overheating and heat build-up, we recommend that the battery should be removed from the

transmitter’s battery compartment prior to charging. The transmitter must be set to „OFF“ and left

in that state for the whole period of the charge process.

Never• switch a radio control transmitter on when it is still connected to the battery charger. The

slightest interruption in the charge process may allow the charge voltage to rise to the point where

it immediately ruins the transmitter.

Never• attempt to carry out any battery discharge or battery maintenance programs via the

transmitter’s integral charge socket. The charge socket is not suitable for this purpose.

When you set a particular current for charging, the charger only supplies that current if the value •

does not exceed the unit’s technical capacity. If you set a charge current which the ULTRA TRIO

PLUS 14 cannot deliver because it falls outside its technical limits, the unit automatically reduces

the current to the maximum possible value. In this case the screen displays the charge current

which is actually ﬂ owing, alternating with the warning message „MAX“.

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