Bedienungsanleitung Graupner MX-16 HoTT (Seite 6 von 200) (Englisch)

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Safety Notes

Checking the transmitter and receiver batteries

It is essential to stop using the radio control system and

recharge the batteries well before they are completely

discharged. In the case of the transmitter this means –

at the very latest – when the message “battery needs

charging” appears on the screen, and you hear an

audible warning signal.

It is vital to check the state of the batteries at regular

intervals – especially the receiver pack. When the bat-

tery is almost ﬂat you may notice the servos running

more slowly, but it is by no means safe to keep ﬂying or

running your model until this happens. Always replace or

recharge the batteries in good time.

Keep to the battery manufacturer’s instructions, and

don’t leave the batteries on charge for longer than

stated. Do not leave batteries on charge unsupervised.

Never attempt to recharge dry cells, as they may ex-

plode.

Rechargeable batteries should always be recharged be-

fore every session. When charging batteries it is impor-

tant to avoid short-circuits. Do this by ﬁrst connecting the

banana plugs on the charge lead to the charger, taking

care to maintain correct polarity. Only then connect the

charge lead to the transmitter or receiver battery.

Disconnect all batteries and remove them from your

model if you know you will not be using it in the near

future.

Capacity and operating times

This rule applies to all battery types: capacity diminishes

with each charge. At low temperatures the battery’s

internal resistance rises, and capacity falls. This means

that its ability to deliver current and maintain voltage is

reduced.

Frequent charging, and / or the use of maintenance

programs, tends to cause a gradual reduction in battery

capacity. We recommend that you check the capacity of

all your rechargeable batteries at least every six months,

and replace them if their performance has fallen off

signiﬁcantly.

Use only genuine Graupner rechargeable batteries!

Suppressing electric motors

All conventional (brushed) electric motors generate

sparks between the commutator and the brushes, which

cause more or less serious interference to the radio

control system, depending on the type of motor. If an

RC system is to work correctly, it is therefore important

to suppress the electric motors, and in electric-powered

models it is essential that every motor should be effec-

tively suppressed. Suppressor ﬁlters reliably eliminate

such interference, and should always be ﬁtted where

possible.

Please read the notes and recommendations supplied

by the motor manufacturer.

Refer to the main Graupner FS catalogue or the Internet

website at www.graupner.de for more information on

suppressor ﬁlters.

Servo suppressor ﬁlter for extension leads

Order No. 1040

Servo suppressor ﬁlters are required if you are obliged

to use long servo extension leads, as they eliminate the

danger of de-tuning the receiver. The ﬁlter is connected

directly to the receiver input. In very difﬁcult cases a

second ﬁlter can be used, positioned close to the servo.

Using electronic speed controllers

The basic rule is that the electronic speed controller

must be chosen to suit the size of the electric motor it is

required to control.

There is always a danger of overloading and possibly

damaging the speed controller, but you can avoid this by

ensuring that the controller’s current-handling capacity is

at least half the motor’s maximum stall current.

Particular care is called for if you are using a “hot” (i. e.

upgrade) motor, as any low-turn motor (small number of

turns on the winding) can draw many times its nominal

current when stalled, and the high current will then burn

out the speed controller.

Electrical ignition systems

Ignition systems for internal combustion engines can

also produce interference, which has an adverse effect

on the working of the radio control system.

Electrical ignition systems should always be powered by

a separate battery – not the receiver battery.

Be sure to use effectively suppressed spark plugs and

plug caps, and shielded ignition leads.

Keep the receiving system an adequate distance away

from the ignition system.

Static charges

Lightning causes magnetic shock waves which can

interfere with the operation of a radio control transmitter

even if the thunderstorm actually occurs several kilome-

tres away. For this reason …

… cease ﬂying operations immediately if you notice

an electrical storm approaching. Static charges

through the transmitter aerial can be life-threaten-

ing!

Caution

In order to fulﬁl the FCC RF radiation regulations •

Safety Notes

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