GP940E 01/97
27.02.97
7
The light emitting diode informs about the actual charging program step (every 2 seconds):
= charging battery (for 14 hours)
= battery was charged for 14 hours without interruption;
charging battery continues
The older FDR version 1.16 has two additional steps in the beginning when charging starts:
= charging battery (for one minute)
= discharging battery (for about one hour)
Charging also should be done if the internal battery was discharged by other means.
The battery will be discharged:
-
if PC operation is done for a too long time
-
if the glider power was not turned off overnight by mistake: when external supply voltage
drops below 6 Volt, the internal battery of the GP940 will be discharged.
Important:
When GP940 is turned off, there must always be the turn off beep ! This shows that the in-
ternal battery is o.k. . If turn off beep is missing, recorded flight data are unvalid for FAI use!
If there is no turn off beep after charging, then the internal battery is faulty and must be replaced by
the manufacturer.
Producing turn off beep in spite of faulty internal battery:
1. After landing do not turn off glider power; recording of FDR continues.
2. Supervised by OO (oficial observer) connect a laptop to FDR with glider power still on and select
any FDR function (like read flight data ). The FDR will produce a turn off beep after 8 seconds
and
will switch to PC mode.
3. Disconnect laptop and turn off glider power.
6. Entering data from glider computer SR940:
If the recorder is connected to glider computer SR940 and if the SR940 has the latest program ver-
sion to allow this (version 9606 or later), data can be exchanged between recorder and SR940. The
recorder power supply must be turned on.
The SR940 has a special text page to communicate with the GP940; this text page has several sub-
menues:
