Bedienungsanleitung Graupner MX-16 HoTT (Seite 16 von 200) (Englisch)

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Operating Notes

Receiver power supply

A wide range of rechargeable four-cell and ﬁve-cell NiMH

batteries varying in capacity is available for use as the

receiver power supply. If you are using digital servos we

recommend that you use a ﬁve-cell (6 V) pack of gener-

ous capacity. If your model is ﬁtted with a mixture of

digital and analogue servos, it is important to check the

maximum permissible operating voltage of all the types.

The PRX unit, Order No. 4136, provides a stabilised

receiver power supply with a user-variable voltage from

one or two receiver batteries; see Appendix.

For reasons of safety battery boxes or dry cells should

never be used.

The voltage of the airborne power supply is displayed on

the transmitter screen while the model is ﬂying:

#01

2:22h

stop

flt

0:00

5.5V

5.2V

HoTT

If the voltage falls below the pre-set warning threshold -

3.8 Volt as standard, but variable in the Telemetry menu;

see page 146 - a visual and audible low-voltage warning

is triggered.

Nevertheless it is important to check the state of the

batteries at regular intervals. Don’t put off charging

the batteries until the warning signal is triggered.

Note:

Please refer to the main Graupner FS catalogue or visit

the Internet site at www.graupner.de for full details of

batteries, chargers, measuring equipment and battery

monitor units.

Charging the receiver battery

The charge lead, Order No. 3021, can be connected

directly to the NC receiver battery for charging. If the

battery is installed in a model and you have installed one

of the following switch harnesses: Order No. 3046, 3934

or 3934.1 or 3934.3, the battery can be charged via the

separate charge socket, or the charge socket which is

built into the switch. The switch on the switch harness

must be left at the “OFF” position for charging.

Polarity of the receiver battery connector

General notes on battery charging

Observe the recommendations provided by the •

charger manufacturer and the battery manufacturer

at all times.

Keep to the maximum permissible charge current •

stated by the battery manufacturer.

The maximum charge 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, you must ﬁrst remove the

pack from the transmitter, otherwise you risk damag-

ing the circuit board through overloading the conduc-

tor tracks, and / or overheating the battery.

Carry out a series of test charges to ensure that the •

automatic charge termination circuit works correctly

with your battery. This applies in particular if you are

using an automatic charger designed for NiCd batter-

ies to recharge the standard NiMH battery.

You may need to adjust the charger’s termination •

behaviour, if it provides this option.

Do not discharge the battery or carry out a battery •

maintenance program via the integral charge socket.

The charge socket is not suitable for this application.

Always connect the charge lead to the charger ﬁrst, •

and only then to the transmitter or receiver battery.

Observing this rule eliminates the danger of acciden-

tal short-circuits between the bare contacts of the

charge lead plugs.

If the battery becomes hot when on charge, it is time •

to check the pack’s condition. Replace it if necessary,

or reduce the charge current.

Never leave batteries unsupervised when on •

charge.

Read and observe the safety notes and handling •

information in the section starting on page 8.

Operating Notes

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Graupner MX-16 HoTT Seite 16

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