JETI model MVario User manual

MVario
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The MVario System measures the atmospherical pressure and calculates with the
obtained data the altitude above sea level, the rate of climb as well as the rate of descent and
records extreme values of these data. The changes of rates of climb and descent are signalled
and if preadjusted limits are exceeded, alerts are calling for attention. Informations of the
sensor are transmitted via the Duplex System to the user.
The Duplex System takes advantage of the 2,4GHz band for communication and is not
only transmitting model control data to the model, but is also receiving data from the model
back to the transmitter. The telemetric data gained during operation are shown as actual
measured values in real time on the LCD screen of the JETIBOX.
Technical Parameter MVario
Dimensions 20x11x5
Weight with cables 6g
Measuring accuracy of absolute/realative altitude ±9m/±3m
Measurement range 300÷1100hPa
Operating temperature -10÷85°C
Supply voltage 3,5 ÷ 8,4V
Current consumption 6mA
The sensor renders possible to adjust an acoustic signal for the climb rate/descent rate or
for exceeding of a preadjusted limit value. The acoustic signal consists of 4 different kinds
(steps) for climbing and the same amount of steps for descending. The step width can be
adjusted by the user. The climb signal consists of short interrupted tones, the descent signal
of long interrupted tones.
Design of the MVario Sensor:
The MVario is a sensitive barometric sensor. Any pressure change results in a change of
altidude above sea level, of climb rate a. s. o. The sensor should be solely influenced by static
atmospheric pressure, not by any airflow through the model. Therefore placement of the
sensor in the model should be considered carefully. Place the sensor in the model in a
horizontal position (the MVario name sticker on top) in a position where only static
atmospheric pressure can have an effect.
Connecting the MVario see fig. page 5.:
The MVario comprises an exit marked Ext. (black connector) and an input (red
connector). Via the exit (black connector) of the sensor informations are transmitted to the
receiver or to the JETIBOX, and it serves as current supply as well. Via the input (red
connector) the acoustic signalling of the MVario can be activated/deactivated and furthermore
it is used for connecting up to a free receiver channel.
1. The triple-core cable with JR plug (black connector) can be plugged in directly into the
JETIBOX (socket with the marking Impulse, + - ). For current supply you have to use the
second input of the JETIBOX with the marking (+ - ), please apply a voltage of 5-8,4V. When
taking advantage of this type of connection you must be aware that there exists no wireless
data transfer and the measured data are directly shown on the LCD screen of the JETIBOX.
This connection type allows no alert signal generation and no acoustical signals of the Vario,
because the buzzer is a component of the transmitter module which is not connected in that
case. Alert signals are shown on the LCD-screen only.

MVario
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2. Connect the triple-core cable of the MVario sensor with JR plug (black connector) to the
back side of the DUPLEX receiver (to the socket marked Ext.). Connect the input of the
MVario with JR plug (red connector) to a free receiver channel. The MVario module gets its
current supply via the receiver. In order to adjust parameters of the MVario connect the
JETIBOX to the transmitter module and switch on receiver and transmitter.
3. Connect the triple-core cable of the MVario sensor with JR plug (black connector) to one
of the EXPANDER inputs. Connect the input of the MVario with JR plug (red connector) to a
free receiver channel. The expander renders connection of several telemetry sensors to one
receiver possible. In such a case gets the MVario sensor its current supply via the expander
and the expander via the receiver.
Besides other competencies of the JETIBOX terminal it handles also duties like
parameter adjustments and data readout. After connection to the MVario sensor an
introduction screen appears showing in the first line the identification of the sensor and the
realive altitude above sea level. In the second line you see the indicator and the value of the
Vario (climb rate/descent rate in m per 1s). The indicator of the Vario consists of eight
positions. The number of filled positions forms the size of the Vario indication. The symbol
„>“ stands for one step of climb. The Symbol „<“stands for one step of descent. By pushing
the JETIBOX button D (downward arrow) you will enter the MVario sensor menu.
MVARIO Sensor Menu:
SENSOR MENU: ACTUAL VAL – by pushing the button D (downward arrow) you will
select the display of actual measurement values
Rel/Abs Altitude - relative and absolute altitude above sea level. After switching on a
comparison basis (zero altitude) is created from the absolute altitude for the relative altidude.
The relative altitude is the result of the difference of the actual absolute altitude and the
comparison basis (zero altitude).
Vario – indicates the actual rate of climb/rate of descent in meters per 1s.
Abs. Pressure – indicates the actual atmospherical pressure in hPa.
Temperature – indicates the actual temperature of the sensor.
SENSOR MENU: MIN/MAX - by pushing the button D (downward arrow) you select
recording of extreme values which occured during measurements.
Vario MIN/MAX – indicates the minimum descent rate and the maximum climb rate
Altitude MAX – indicates the achieved maximum relative altitude
Temp MIN/MAX – indicates the minimum and maximum temperature of the sensor

MVario
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SENSOR MENU: SETTING - by pushing the button D (downward arrow) you will change
to the basic setup of the MVario sensor.
Erase data – manual deletion of extremes. By simultaneous pushing of the arrow buttons R
and L (right and left) all records of measured parameters (minimum and maximum) will be
deleted.
Sensor sens. – adjustment of sensor sensitivity which determines the indicator step length of
the introduction screen and the step length of the acoustic signal. (For instance - sensitivity
adjustment of 1m: If the Vario indicator picture of the introduction screen is fully filled up
then the value of climb rate/descent rate corresponds with 4m and step length of the acoustic
signal with ±1m)
Beep period – adjustment of the time between a group of tones of the Vario acoustic signals.
The number of tones corresponds with the change of climb rate/descent rate which has
occured during the set time.
Trigger level – adjustment of the value of the input pulse length, after whose exceeding the
extremes become deleted and the acoustic signalling of the climb rate/descent rate starts. As
long as the MVario input is not connected to the receiver channel the acoustic signalling is
switched on constantly and deleting of extremes does not proceed automatically. (We
recommend connection of the input to the receiver channel which is controlled from the
transmitter by a switch or by the throttle channel.)
Reverse – reversation adjustment of the input signal evaluation. (For instance, as long as the
trigger level „Trigger level“ is set to 1.50 ms and „Reverse“ to OFF). MVario evaluates an
infringement if the input signal is longer than 1.50 ms and an automatic deletion of extremes
occurs. Furthermore, extremes recording starts and acoustic signalling of the Vario will be
switched on. If the input signal lies below the trigger level, no recording of extremes will
occur and signalling is switched off.)
Alti. above sea – adjustment of the reference altitude above sea level for sensor calibration.
For exact measurements of the absolute altidude the known altitude above sea level must be
set at a point, where the sensor will be operating further on.
Beep Vario Alarm – adjustment of the Morse alphabet character which will represent
infringement of the Vario alert setting by an acoustical tone of the DUPLEX Tx transmitter
module.
Beep Alti. Alarm – adjustment of the Morse alphabet character which will represent
infringement of the altidude alert setting by an acoustical tone of the DUPLEX Tx transmitter
module
Vario beep – adjustment of one of 4 modes of the Vario acoustic signalling. „ON“ is the
active signalling of climb and descent flight. „ON – DESCENT“ is the active acoustic
signalling for descent flight only. „ON – CLIMB“ is the active acoustic signalling for climb
flight only. In the „OFF“ mode the Vario acoustic signalling is switched off. These
adjustments do not affect the acoustical alert signalling which is always switched on. (If you
want to be informed about violation of one set alert only, signalling of the vario must be
switched off. We do not recommend simultaneous setting of alerts as well as signalling of the
Vario.)
Factory setting – by pressing arrow push buttons R and L (right and left) simultaneously the
sensor will be resetted to factory settings.

MVario
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SENSOR MENU: ALARMS – by pushing the button D (downward arrow) you will change
to the setup of particular alerts. If an adjusted parameter becomes passed over, the LCD
screen of the JETIBOX will show in the second line of the introduction screen alternately the
original data with the matching alert and the buzzer of the transmitter module will emit the
alert signal. The first tone is the revelation tone and the second one beeps the Morse code of
the chacter representing the corresponding alert. If the alert is in position OFF, the given alert
is switched off.
Vario High Al. – adjustment of the signal representing high climb rate, if the value measured
by the Vario exceeds the set value, the alert will be activated.
Vario low Al. - adjustment of the signal representing high descent rate, if the value measured
by the Vario exceeds the set value, the alert will be activated.
Alti. High Al. - adjustment of the signal representing the relative altitude, if the value of the
relative altitude exceeds the set value, the alert will be activated
Warranty:
For this product we grant a warranty of 24 months from the day of purchase under the
assumption that it has been operated in conformity with these instructions at recommended
voltages and that it has not been damaged mechanically. Warranty and post warranty service
is provided by the manufacturer.
We wish you sucessful flying with the products of:
JETI model s.r.o. Příbor, www.jetimodel.cz

MVario
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Connetion alternatives of the MVARIO sensor:
1. directly to the JETIBOX. In that case it is mandatory to apply a voltage source of 5
to 8,4V, for instance a receiver battery. The triple core cable with JR plug (black
connector) must be connected to the JETIBOX (to the socket marked impulse, + -).
The triple core cable with JR plug (red socket) is not connected.
2. directly to the receiver input (Ext.). This layout allows connection of one MVario
sensor which obtains its current supply via the receiver. The triple core cable with JR
plug (black socket) must be connected to the DUPLEX receiver (to the input marked
EXT). The triple core cable with JR plug (red socket) is connected to the receiver
channel.
3. Connection via an Expander Ex. This arrangement allows simultaneous data
processing of several sensors (depending on type of expander), current supply of the
sensors is realized via the expander. The triple core cable with JR plug (black socket)
is connected to the expander. The triple core cable with JR plug (red socket) must be
connected to a free receiver channel.

MVario
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Menu of the MVARIA Sensor as shown by the LCD Screen of the JETIBOX: