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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.
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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.
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Sensor MUI EX
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C – the set current has been exceeded and current alarm has been activated
D – the measured current decreased beyond the set alarm value, alarm will be cut off. The measured
current decreased beyond the set level Start Trigger. The timer Run Time is switched off. Recording of
extremes and consumed capacity is going on.
Connection of the MUI Sensor
1. The triple cable with JR connector can be connected directly to the JETIBOX (the connector marked
Pulse, + - ). Connect to the other JETIBOX input marked by (+ - ) the power supply voltage of 5-8,4V.
This connection mode does not take advantage of wireles data transmission, measured data are shown
directly on the JETIBOX LCD display. This mode does not allow acoustic alarm generation because the
siren is a part of the transmitter module which is not connected in this case. Alarms are only shown on the
LCD display.
2. Connect the MUI sensor triple cable with JR connector to the DUPLEX receiver socket (marked Ext.)
on the receiver back side. For parameter setup connect the JETIBOX to the transmitter module. The MUI
sensor gets its power supply from the receiver.
3. Connect the MUI sensor triple cable with JR connector to one of the EXPANDER inputs. The
expander renders it possible to connect several telemetric sensors to a single receiver. In this case the
MUI sensor gets its power suply from the Expander and the Expander from the receiver.
Firmware Update
The equipment firmware may be updated by a PC via the converter unit JETI USB Adapter. In the
USB Adapter instructions you will find a description of the installation procedure of the USB Adapter
controller as well as the update program.
Connection of the MUI Sensor
There are two inputs available at the MUI sensor, one for current measurement purposes (marked A)
and the other one for connection of the measured voltage (marked V).
The current must pass through the MUI, it is therefore necessary to connect it in series with the current
supply (battery). If the current polarity is reversed the sensor will show instead of the real current value
just 0 A. In that case reverse the current measurement input wires. Do not forget to use proper connectors
with sufficient load capacity for current measurements. For currents up to 30A we recommend G3,5
connectors, up to 75A G4 connectors and up to 150A G5,5 connectors or even better.
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Sensor MUI EX
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Connect the measured voltage in parallel to the measuring cables of the MUI sensor. Connect plus
polarity to the red cable and minus polarity to the black cable. Watch the correct polarity of the applied
voltage. Due to the high resistance of the measured voltage input the connector quality is not very
important, but we nevertheless recommend good quality connectors with reverse polarity protection.
We grant a warranty of 24 months from the day of purchase under the assumption that they have
been operated in conformity with these instructions at recommended voltages and that they were not
damaged mechanically. Warranty and post warranty service is provided by the manufacturer.
We wish you successful flying with the products of JETI model s.r.o. Příbor, www.jetimodel.cz
MUI Sensor Menu as shown by the JETIBOX LCD:
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