Flytec AG, Ebenaustrasse 8a, CH-6048 Horw
Electronic flight instruments made in Switzerland
Flytec 4020
Operating Instructions
Operating Instructions FL YTEC 4020 1
General remarks 3
Introduction 3
Instrument overview 4
Keyboard 5
Operating philosophy 5
Run mode (normal operating mode) 5
Setting mode (for adjustments) 5
Option mode 6
Commissioning 6
The altimeter 7
General remarks 7
How does an altimeter work? 7
Altimeter 1 (ALT1) 8
Altimeter 1 setting mode 8
Altimeter 1 option mode 8
Altimeter 2 (ALT 2) 9
Altimeter 2 setting mode 10
Altimeter 2 option mode 10
Vario 11
Vario sound levels 11
Analog vario bar display 11
Digital vario display (Integrator) 11
Vario setting mode 12
Vario option mode 12
Descent tone/Descent alarm 13
Descent alarm setting mode 13
Speedometer 14
General remarks 14
Display 14
Correction 14
Speedometer setting mode 14
Option mode of the speedometer 15
Operating Instructions FL YTEC 4020 2
Time measurement and temperature display 16
Clock time (real-time clock) 16
Stopwatch (CHRONO) 16
Flying time 16
Temperature display 16
Time measurement and temperature display setting mode 17
Time measurement and temperature display option mode 17
Logbook 18
General remarks 18
Printout 18
Barograph 19
Recording 19
Time marker 19
Printout 19
Transmission to a PC 19
Barograph setting mode 20
Barograph option mode 20
APPENDIX 21
Scope of supply 21
Procedure for Official FAI Observers 21
Water damage 22
ASCII table 23
PC and printer interface 23
Function overview 23
Operating Instructions FL YTEC 4020 3
General remarks
Introduction
Flytec’s 4020 is a completely new development. The new instrument is now more compact,
lighter and more economical thanks to the use of the very latest technology .
The 4020 is an instrument which you can adjust to suit your requirements. For this reason, all
important data can be altered quickly and easily. You’re flying in the United States? No problem: Altimeter 1 displays the altitude in feet and Altimeter 2 displays the meters to which you
are accustomed! This is just one example of what the 4020 has to offer.
With this new instrument, we have remained loyal to Flytec’ s operating philosophy - and also
improved it with the new option mode. Flytec’s new 4020 is an instrument that will give you
immense enjoyment.
Your Flytec team
Operating Instructions FL YTEC 4020 4
Instrument overview
1. On/Off switch
2. Analog vario bar display
3. Digital vario display
4. INDICAT OR display
5. TIME / SPEED / MEMO display
6. Altimeter & stopwatch display
7. Key
8. Speed sensor socket
9. PC and printer interface
10. REC switch
3
6
5
4
1
8
7
9
10
2
Operating Instructions FL YTEC 4020 5
Keyboard
Operating philosophy
The philosophy behind all Flytec instruments is to keep everything as simple as possible. This
is why each key has only one function, i.e. a function can be displayed and switched on or off
with each key. In or der to alter a function, you pr ess and hold down the r elevant function key.
The setting to be changed will then flash and can be altered by pressing and .
The instrument has three operating modes: normal operating mode, setting mode and configuration mode.
Run mode (normal operating mode)
The instrument is in run mode when used in normal operation. In run mode, the instrument will
display your altitude, ascent and the time continuously.
Setting mode (for adjustments)
In setting mode, the most important value can be changed for each display. For example, the
altitude can be set by using the setting mode for altimeter 1.
CLEAR ALT 2
TIME
SPEED
MEMO
PRINT
0-I-II
ALT 1
ALT 2
CHRONO
START - STOP
RESET
OPTION
1 3
4 5 6
2
1 START-STOP-RESET
2 VARIO
3 ALT1-ALT2-CHRONO
4 CLEAR AL T 2
5 SINK (PRINT)
6 TIME / SPEED / MEMO
START - STOP
RESET
CLEAR ALT 2
Operating Instructions FL YTEC 4020 6
Enter setting mode for a particular display (e.g. for altimeter 1), by pressing the relevant function key (e.g. ) and holding it down for about 4 seconds. As soon as you are in setting
mode, the SET indicator will appear in the INDICA TOR display. The value to be changed begins
to flash.
In order to return to run mode, press the relevant function key briefly (e.g. )
If no change is made in setting mode for 15 seconds, the instrument returns to run mode.
Option mode (configuration mode)
Option mode allows you to configure the instrument to your requirements and prefer ences. In
option mode, you can set the parameters for the relevant display or function at various levels.
For example, these can be units or special functions. A precise description of the various settings in option mode is given in the descriptions of the individual functions.
You can enter option mode (in the setting mode of a function) by simultaneously pressing the
two keys marked “Option” in yellow (Fig. 1). If the instrument is in option mode, this is confirmed by the OPTION indicator in the INDICA TOR display.
In OPTION mode you can change several parameters. By briefly pressing
the relevant function key (e.g. ) you skip from one level to the next. In
each level you can change one parameter of the relevant function. The level
number will appear each time in the digital vario display.
If no change is made for 15 seconds in option mode, the instrument returns
to run mode.
In order to return to run mode manually , pr ess the two option keys simultaneously again (Fig. 1).
Using FlyChart 4.0 software on a PC, all settings in setting and option
modes can be conveniently set and transmitted to the instrument via the PC
interface.
Commissioning
Switch on the instrument with the On/Off switch. On being switched on, the instrument goes
through a self-test routine and then enters run mode.
ALT 1
ALT 2
CHRONO
CLEAR ALT 2
START - STOP
RESET
Figure 1
ALT 1
ALT 2
CHRONO
ALT 1
ALT 2
CHRONO
OPTION
Operating Instructions FL YTEC 4020 7
When switched on, the instrument settings correspond to those valid when the instrument was
last switched off.
When first switched on, the instrument displays the approximate charging status of the batteries in the vario bar display. If the display shows approximately 50% of the maximum display
in the green sector, the batteries are still half full. If the display is in the red sector, the batteries must be changed. If the batteries are low on charge during a flight, PO will light up briefly
in the digital vario display and, at the same time, the charging status of the batteries is shown
in the bar display.
The battery life of the instrument using alkaline batteries is 160 hours. Rechargeable batteries
can also be used. However, operating time is substantially shorter with these (total operating
time is approximately 40 - 50 hours).
Alkaline batteries can also be recharged several times using the appropriate char ging unit (no
fast chargers!).
The altimeter
General remarks
How does an altimeter work?
An altimeter is really a barometer because it does not measure altitude directly but pressure.
The altitude is then calculated from the pressure. For the purpose of calculating absolute altitude (according to the international formula for altitude), the pressure at sea-level is assumed
as being zero-point pressure.
Why does pressure change with altitude? The air pressure at a point on Earth is pr oduced by
the weight of the atmospheric air above it. This is why air pressure decreases with altitude there is less air above your head! At 500 meters above sea-level, a pressure change of 1 mbar
corresponds to a difference in altitude of about 8 meters.
In practice, however, it is not quite that simple as other factors also have an influence on air
pressure. Pressure also depends on temperature and, of course, weather. On a stable day,
there can be air pressure fluctuations of 1 mbar caused by temperatures and this corr esponds
to a difference in altitude of ± 10 meters. Depending on the weather, air pressure at sea-level
(QNH) can be between 950 mbar and 1050 mbar . In order to eliminate this weather effect, an
altimeter needs continual recalibration. This means that the altimeter must be set at a known
altitude to display that same altitude.
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