Charging the transmitter
battery
F X - 4 0
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NOTES ON HANDLING LITHIUM BATTERIES
•
Li-Poly cells feature an extremely low self-discharge rate of
around 0.2% per day, and for this reason they can be stored
for long periods without problems. However, deep-dischar-
ging must be avoided, as the pack will sustain permanent
damage in the form of loss of capacity if discharged too far.
After about five months of storage, and at the latest at a vol-
tage of 2.5 Volts / cell, it is essential to recharge the pack.
Before any protracted period of storage you should recharge
the battery to at least 50% of nominal capacity. After about
five months the pack should be recharged again.
•
The theoretical useful life of a Lithium cell when operated at
low discharge currents is around 500 charge / discharge
cycles.
•
Since Li-Poly cells do not suffer from the memory effect (lazy
battery effect), it is not necessary to discharge them before
recharging (cycling, balancing, as required with NC and
NiMH batteries). In fact, it is harmful to discharge first, and
this should be avoided. The capacity of Li-Poly cells declines
slightly with each charge cycle, so prior discharging would
result in premature capacity loss.
RC CHARGER
The RC charger included in the set is suitable for charging 7.4
Volt Lithium batteries, and features a voltage-controlled automa-
tic cut-off circuit (8.4 Volts).
The charge current is approximately 2 A.
It can be connected:
•
to a 12 V car battery or 12 V DC mains PSU via the cigar ligh-
ter adaptor (supplied);
•
or to a mains socket (110 … 230 V AC) using the mains adap-
tor.
During static programming operations it is permissible to charge
the transmitter while it is switched on for programming, as this
extends the transmitter’s operating time. Touching the touch-
screen always switches the backlighting on again briefly.
5.9 LITHIUM TRANSMITTER BATTERY
•
Unscrew the back panel from the transmitter.
•
Press in the battery retainer latch “1” and remove the retai-
ner.
•
Place the battery in the transmitter with the printed arrow-
head facing the right. Check that it is straight, then push it to
the right as far as it will go
•
Re-fit the battery retainer and engage the latch.
REMOVING / REPLACING THE TRANSMITTER BATTERY
•
First switch off the transmitter; this ensures that any settings
you have altered during the current session are stored.
•
Disengage the battery retainer, and remove the battery.
•
Slide the battery to the left until the contacts are exposed,
then lift the pack out.
Note:
never remove the battery from the transmitter when the
monitor LED is still flashing yellow.
This could result in loss of memory data or damage to memory
modules.
If this should occur, you will see the screen message “Backup
Error” next time you switch the transmitter on. Do not use the
transmitter if you see this message; send it to the robbe Service
Centre for checking.
The battery pack is fitted with an internal electronic protective
circuit which to a large extent prevents overcharging, low-volta-
ge and short-circuit problems. For this reason the battery is only
suitable for use in the FX-40 transmitter.
CURRENT DRAIN / OPERATING TIMES
The LT4F5000 Lithium transmitter battery has a capacity of 5000
mAh. The current consumption of the transmitter varies consi-
derably according to the length of time the LCD screen back-
lighting is used, as this draws a significant current.
•
Transmitter with RF section operating, without screen back-
lighting: approx. 450 mA = approx. 8 … 10 hours;
•
Transmitter with RF section operating and screen backligh-
ting on: approx. 750 mA = approx. 5 … 6 hours.
The low-voltage alarm sounds when the residual capacity dis-
play falls to 19%. If this should happen, cease using the trans-
mitter immediately and recharge it.
For longer operating times we recommend that you purchase a
reserve battery.
We suggest that you set the power-on time for the screen back-
lighting to about 30 seconds, as this maintains long operating
times for the transmitter.
Most of the time you are using the transmitter the screen back-
lighting will not be required, as the display is clearly legible even
in daylight.
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