JETI model MT125 Manual

MT125 & MT300 Sensor EX
Designation of MT Sensors are temperature measurements of devices like motors, controllers,
batteries and other model accessories. Presentation of the measured data is realized by the JETIBOX
terminal and the wireless information transfer is ensued with aid of the DUPLEX 2,4GHz system.
The Duplex System takes advantage of the 2,4GHz-Band for communication which allows not only
the transfer of remote control data to the model, but also in the opposite direction to the transmitter. The
telemetric data measured during operation are transmitted in real time and the actual state of the data can
be depicted on the JETIBOX LCD-display. The MT unit records minimum and maximum temperatures of
the individual sensors and delivers besides that their actual values.
The JETIBOX terminal takes care of parameter adjustments as well as of indications of measured data.
The MT device consists of two parts. In the first instance of the MT module itself, which is recording the
data measured by temperature sensors connected to the MT module, which on the other hand can be
connected to the JETIBOX, to a receiver or to an Expander of the DUPLEX system. Keep an eye on the
temperatures of the module and sensors in order not to expose them to temperatures higher than allowable
– see technical data table.
The MT module allows triggering of acoustic alerts by the individual sensors. These alerts can report
of temparature limit violations by too high or too low temperatures exceeding adjusted limits. The
acoustic signal is generated by the transmitter module DUPLEX Tx which contains a small siren. The
signals are differentiated by Morse codes in order to be able to distinguish between the individual types of
alerts referring to individual sensors. The acoustic signalling of parameter violations will be generated
even if there is no JETIBOX available. With a connected JETIBOX there will be an indication on its
display showing which parameter has been violated. If several parameters have been violated at the same
time the alert sounds change consecutively as well as the indications in the JETIBOX LCD-display.
Technical Data
Dimensions
Weight (without cables)
Number of Temprature Sensors
Temperature Sensor Range
Measuring Accuracy
MT-Module Operation Temperature
Supply Voltage
MT-Module & Sensor intrinsic consumption
Connection of MT-Sensors
In the MT125 Module you will find two inputs for the connection of temperature sensors coded A
and B. Connect the sensors to these inputs while paying attention to polarity (red sensor wire to + and the
black one to - ). Constituent parts of the MT300 sensor are two sensors which comprise a loop of heat
resistant conductor in the central part. A silicon tube sliding over the loop serves for fastening purposes.
Fastening of the sensors
Place the MT-Module as far away as possible from
heat sources in order not to exceed the allowed
maximum temperature.
Sensors of the MT125 Module are able to measure
temperatures up to 125°C. Fasten the sensor to the
measured object as secure and tight as possible in
order to prevent contact losses and herewith falsify
measurement results. Choose a fastening method
which corresponds to the assumed maximum
temperature of the measured object. For low
temperatures you may choose glue or shrink tubing
(batteries, controllers etc.). In case of higher
temperatures fasten the sensors by means of the
enclosed plastic tape.
MT125
19 x 14 x 4 mm
10 g (4 g)
2
- 55°C +125°C
0,5 °C
- 10°C to + 85° C
3,5 – 8,4V
7 mA
MT300
19 x 14 x 4 mm
6 g ( 3 g)
2
- 40°C +300°C
5 °C
- 10°C to + 85° C
3,5 – 8,4V
20 mA
- 1-