Manual Graupner Ultramat 12 (page 12 of 36) (English, German, French)

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Liability exclusion

As manufacturers, we at GRAUPNER are not in a position to ensure that you observe the

correct methods of operation when installing, using and maintaining this charger. For this reason

we are obliged to deny all liability for loss, damage or costs which are incurred due to the

incompetent or incorrect use and operation of our products, or which are connected with such

operation in any way.

Japan

Order No. 3371

G2 (AMP/G2,5)

Order No. 3011

BEC

Order No. 3037

Order No. 3021

JR-Sender

Order No. 3022

4. Recommended charge leads /polarity

The requirements made on rechargeable batteries vary greatly according to their particular

application, and this in turn calls for different types of battery connector. Please note that

connectors, connector names and polarities may vary from one manufacturer to another. For

this reason we recommend that you always use genuine matching connectors of identical

construction. The following charge leads are suitable for battery charging with this unit:

5. Charger controls / Using the charger / Starting the process

Be sure to use genuine charge leads fitted with cable of adequate conductor cross-section.

All charge leads should be cut down to a maximum lenght of 30 cm.

All the charger’s functions are controlled by means of just four buttons.

The - / DEC and + / INC buttons are used to change the current and voltage values. The function

of the other two buttons varies according to the presence or otherwise of a battery at the charge

sockets:

Bedien-Taste Funktion

No battery PROGRAMM/MODE Select charge programs and sub-groups

connected: ENTER/START Select the (charge) program group

Battery PROGRAMM/MODE Ends the charge process, stops the buzzer

connected: ENTER/START Starts the charge process, changes

“Battery“

charge output

Operating buttons

Car battery

terminal clips

Cooling fins

Screen

Connectors for

mains PSU

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 manufacturer.

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 first 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 fitted 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 fitted to the transmitter itself. Transmitter charge sockets generally include a diode

which prevents reverse current flow. 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 ULTRAMAT 12 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

ULTRAMAT 12 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 flowing, alternating with the warning message „MAX“.

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Graupner Ultramat 12 Manual

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