JETI model MUI EX, MUI 30, MUI 50, MUI 75, MUI 150 Operation Manual

Sensor MUI EX

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Assignment of the MUI sensor is measurement of voltage, current and consumed capacity of flight
batteries in the model. The wireless data transmission by the DUPLEX 2,4GHz system is monitored by
the JETIBOX terminal.
For communication purposes the Duplex system takes advantage of the 2,4 GHz band, which besides
sending remote control data to the model also receives data from the model back to the transmitter.
During flight obtained telemetric data are transmitted in real time and the actual values of the measured
data can be displayed on the JETIBOX LCD. Telemetric MUI sensors execute voltage and current
measurements in your model and transmit these informations with the aid of the DUPLEX system
(receivers and transmitter modules). Thanks to exact current measurements these sensors render it
possible to trace the spent capacity of the measured battery. The MUI unit is recording the spent current
flow time and its average as well as maximum value. Furthermore it offers exact voltage measurements
and recordings of voltage minimum and maximum values.
The task of parameter adjustment and measured data setup is performed by the well known alround talent
– the JETIBOX terminal.
MUI sensors allow setting of acoustical signals in order to announce violation of set parameters. Such
alarms may be set for measurements of maximum current and minimum voltage as well as for a
maximum of consumed battery capacity. The sound signal is generated by a siren integrated in the
transmitter module. For better differentiation are the particular alarms distinguished by Morse alphabetic
letters. The acoustical alarm generation in case of parameter violation is working even if the JETIBOX is
not connected. With the JETIBOX in place the LCD display shows which parameter has been violated. In
case of violation of several parameters the alerts alter consecutively as well as the indications on the LCD
display.

Technické parametry

MUI 30

MUI 50

MUI 75

MUI 150

MUI200

Dimensions [mm]

20 x 16,5 x 5

27 x 19 x 11

27 x 19 x 11

27 x 19 x 11

27x19x11

Weight

10 g

19 g

21 g

25 g

30g

Range of measured voltage

0 – 60 V

Range of measured current

0 – 30 A

0 – 50 A

0 – 75 A

0 – 150 A

0 – 200 A

Accuracy of voltage
measurment

0,1 %

Accuracy of current
measurment

1 %

Operation temperature

- 10 to + 85° C

Supply voltage

5 – 8,4V

Sensor internal consumption

24 mA

32 mA

32 mA

32 mA

32mA

Menu of the telemetric MUI Sensor

Take advantage of the JETIBOX for parameter adjustment and data readout. After connection to the MUI
sensor the sensor identification is shown and in the second line the preadjusted actual measured data. By
long pushing down button R (right) a fast deletion of all measured parameters can be triggered (min. and
max. voltage, max. current, average current, runtime, capacity). Fast deletion is indicated in the first line
of the display by an asterix „*“.

By pushing the push button D (downward arrow) of the JETIBOX you will enter the MUI sensor menu.

MUI MENU: Actual Value – by pushing D (downward arrow) you will select the display of actual
measured values
Volt / Current – displays actual measured voltage and the current passing through the sensor. By
simultaneously pushing arrows R and L (right and left) the zero value of the sensor current is calibrated.
To the actual measured current value the zero current display is added, i. e. the so called zero shift.

Capacity – shows the actual consumed capacity
Run Time – shows the total time of current passage through the sensor. Included is also the time when the
current has exceeded the adjusted current value Start Trigger in the Setting menu.

Sensor MUI EX

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MUI MENU: MIN / MAX – by pushing the button D (downward arrow) you will select the display of
extreme voltage and current value recordings which occurred during the measurement. The extreme
recordings are deleted automatically or they can be deleted in the menu Setting - Erase Data. Automatic
deletion occurs when the MUI sensor has just been connected to the voltage supply and the current, as set
in the menu Setting-Start Trigger, will be exceeded. If after connection of the sensor the set current will
not be exceeded, values of the previous sensor operation will be displayed.

U MIN / MAX – shows the minimum and maximum value of the measured voltage
I AVG / MAX – shows the average value of the measured current and its maximum

MUI MENU: Setting – by pushing the button D (downward arrow) you will enter the basic sensor setup
menu
Start Trigger – setup of a current value, at which after sensor connection recording of values like
minimum, maximum and current transit time starts. If the adjusted value is 0 A, values will be recorded
immediately after connection of the sensor to its power supply and data read out of the previous operation
will not be possible.
Erase Data – by pushing arrows R and L (right and left) simultaneously the records of measured
parameters will be deleted
First Parametr – adjustment of the display of the first parameter in the JETIBOX LCD, which is shown
in the second line of the basic sensor menu (the first line shows the identification, for instance SENSOR
MUI 30)
Second Parametr - adjustment of the display of the second parameter in the JETIBOX LCD, which is
shown in the second line of the basic sensor menu (the first line shows the identification, for instance
SENSOR MUI 30)
Auto. Erase - This function of automatical deletion after overstepping the trigger level can be activated or
deactivated.

MUI MENU: ALARMS – by pushing button D (downward arrow) you enter setup of particular alarms.
If one of the adjusted parameters becomes exceeded, the JETIBOX LCD will in the second line of the
basic menu alternately show the original display with the pertinent alarm and the transmitter module siren
will emit an acoustical alarm. The first tone is a revelation signal and the second one is signalling a Morse
Code character of the relevant alarm. If the alarm is set to OFF, this kind of alarm will be switched off.
Voltage alarm – (alarm U ..- ) adjustment of the value of voltage signalling, if the measured voltage
decreases beyond the set value, the voltage alarm U will be activated.
Current alarm – (alarm I .. ) adjustment of the value of current signalling, if the measured current
increases beyond the set value, the current alarm I will be activated.
Capacity alarm – (alarm C -.-. ) adjustment of the signalling value of consumed capacity , if the
adjusted value of maximum consumed capacity is exceeded, alarm C will be activated.

MUI MENU: SERVICE – by pressing button D (arrow down) you will change to depiction of the
firmware version and to renewal of the sensor default setting.
Factory Defaults – by simultaneous pressing of arrows R and L (right and left) the factory settings of the
MUI are loaded.
MUI v. xx.xx ID xxxxx:xxxxx – product marking with firmware version and series number (ID).

Particular phases of current measurements

A – when after switching on of the sensor the

current did not exceed the set value Start Trigger.
Measured values (U MIN / MAX, I AVG / MAX,
Capacity, Run Time) correspond with measured
values of the previous operation.
B – the value Start Trigger has been exceeded.
Previous measured values (U MIN / MAX, I AVG /
MAX, Capacity, Run Time) will be deleted and

actualized by the actual measurement course.