03/2018
Operating instructions
Telemetry Adapter V1-1
Art.Nr.: 61108-70
Table of Contents
SAFETY NOTES, MEANING OF SYMBOLS ................................................................................................................. 3
WARNINGS AND SAFETY INSTRUCTIONS ................................................................................................................ 4
EXCLUSION OF LIABILITY AND DAMAGES ................................................................................................................ 5
TELEMETRY ADAPTER V1-0, DESCRIPTION .............................................................................................................. 6
FUNCTIONAL PRINCIPLE ......................................................................................................................................................... 6
CONNECTION OF THE TELEMETRY ADAPTER TO THE ECU ........................................................................................ 7
CONNECTION TO THE ECU V6.0 ............................................................................................................................................. 7
CONNECTION TO THE ECU V10 .............................................................................................................................................. 8
Connection to the Futaba S.BUS2 receiver ................................................................................................................. 8
Connection to the Graupner HoTT receiver ................................................................................................................ 8
Connection to the Multiplex MSB receiver .................................................................................................................8
SETTING THE ECU TO THE DESIRED TELEMETRY PROVIDER/TYPE ............................................................................. 9
FUTABA S.BUS2 MODE ........................................................................................................................................ 10
REGISTERING THE JETCAT TELEMETRY ADAPTER AS NEW S.BUS2 SENSOR ON THE FUTABA TRANSMITTER ........................................... 10
Connections with transmitter variant A ................................................................................................................... 10
Connections with transmitter variant B ................................................................................................................... 11
Register process using the T18MZ as an example.................................................................................................... 12
CONNECTION OF THE JETCAT TELEMETRY ADAPTER TO THE S.BUS2 OF THE FUTABA RECEIVER .........................................................13
TRANSMITTED DATA (FUTABA S.BUS2 MODE) ........................................................................................................................ 14
EXAMPLE REPRESENTATION OF JETCAT TELEMETRY VALUES IN THE FUTABA TRANSMITTER T18MZ ....................................................15
...................................................................................................................................................................................... 15
GRAUPNER HOTT MODE ...................................................................................................................................... 16
CONNECTION OF THE JETCAT TELEMETRY ADAPTER TO A GRAUPNER HOTT RECEIVER .....................................................................16
TRANSMITTED DATA (GRAUPNER HOTT MODE) ....................................................................................................................... 17
EXAMPLE REPRESENTATION OF JETCAT TELEMETRY VALUES IN THE GRAUPNER MC32 TRANSMITTER T18MZ ...................................... 18
MULTIPLEX SENSOR BUS, MSB MODE .................................................................................................................. 21
CONNECTION OF THE JETCAT TELEMETRY ADAPTER TO A MULTIPLEX MSB RECEIVER ...................................................................... 21
DATA TRANSMITTED (MULTIPLEXED MSB MODE “MPX M-LINK1” FOR OLDER TRANSMITTERS) ....................................................... 21
EXAMPLE VIEWS OF TELEMETRY VALUES IN THE MULTIPLEX TRANSMITTER ..................................................................................... 22
DATA TRANSMITTED (MULTIPLEXED MSB MODE “MPX M-LINK2” FOR NEWER TRANSMITTERS) ...................................................... 23
JETI TELEMETRY MODE ........................................................................................................................................ 24
SELECT SENSOR VALUES FOR DISPLAY...................................................................................................................................... 26
SUBMITTED DATA (JETI MODE) ............................................................................................................................................. 28
ALARMS JETI ..................................................................................................................................................................... 30
Page 2 / 31
Safety notes, meaning of symbols
Attention!
This symbol highlights the following information that require the compliance of the user!
Any disregard for the adjacent instructions can impair the safety function as well as the
safety of the user himself.
Attention!
This symbol highlights limitation that require compliance by the user!
Any disregard for the adjacent limitations can impair the safety function as well
as the safety of the user himself.
This symbol highlights instructions, which should be strictly observed by the user to
ensure safe operation of the unit.
Attention!
Risk of fire and explosion!
Page 3 / 31
Warnings and safety instructions
WARNING!
Faults and defect during construction and or commissioning of the model can lead to injury
or even have fatal consequences.
ATTENTION!
Before you start operating a model air plane, you have to learn about the relevant legal
provisions. From a legal point of view, a flying model is an aircraft and is subject to the
relevant laws which have to be observed. The brochure “Luftrecht für Modellflieger”
(Air Traffic Law for Model Flyers) provides a summary of the German laws; it is also available
from specialist retailers. For models with jet engines an ascent permit must be available; in
addition there are insurance obligations. Postal regulations regarding radio control systems
also have to be observed. The regulations of the respective countries also have to be
adhered to.
WARNING!
The CAT JetCat model jet engines have been designed exclusively for model flying and are
not suitable for any other purpose. Any other use is not permitted, except solely for model
air plane flights since any other uses may lead to personal injury or death.
WARNING!
Any deviations from the instructions in this manual or of the respective manufacturer, the
use of other parts or materials and changes to the design which may have a negative effect
on the functioning and operational safety of the engine have to be avoided under all
circumstances.
Prior to starting a model, check all functions and all rudders and the reach of the remote
control while the remote control system is switched on without the antennae being
extended (or acc. to the remote control manufacturer requirements).
This operating check has to be repeated with the engine running and with all accessories.
The instructions for the radio control system also have to be observed.
Page 4 / 31
EXCLUSION OF LIABILITY AND DAMAGES
The adherence to the assembly and operating instructions in connection with the model and the
model jet engine as well as the installation, operation, use and maintenance of components
related to the model can not be supervised by CAT, M. Zipperer GmbH (hereinafter referred to as
“JetCat”). JetCat and its employees therefore assumes no liability for losses, damages or costs
resulting from the incorrect operation, erroneous behaviour or in any way with the abovementioned. If not otherwise regulated by law, the liability of JetCat to pay damages due the use of
the model, for whatever reasons, is excluded (incl. personal injury, death, damage to buildings and
damage due to loss of sales or business loss from trading interruption or other indirect or direct
consequential damages). The liability is regulated under all circumstances and in any case by the
legal regulation of the service contract.
THE COMMISSIONING AND OPERATION OF THE MODEL AND/OR the ENGINE NEXT TO ITS
ACCESSORIES TAKE PLACE AT THE SOLE RISK OF THE USER.
You affirm that JetCat cannot oversee and monitor that instructions for the setting up, operation,
use of the model aircraft, model jet engine and use of the radio control are followed. On the part
of JetCat, neither assurances, contractual agreements nor guarantees or other agreements have
been made to persons or companies in terms of functionality and commissioning of the model and
the model jet engine. In acquiring this model or model jet engine, you as user have relied on your
own expert knowledge and your own powers of judgement.
Page 5 / 31
Telemetry Adapter V1-0, description
The JetCat Telemetry Adapter allows the transmission of various ECU system values to the
telemetry system of different providers.
Presently supported telemetry providers:




Multiplex Sensor Bus (MSB v2) (M-Link Telemetry)
HoTTv4
Futaba S.Bus
Jeti
Functional principle
The JetCat Telemetry Adapter is connected directly to the ECU data bus.
The output of the Telemetry Adapter typically goes directly to the receiver (telemetry input of the
receiver). The sensor has two parallel switched outputs for the second output to be able to be
connected to another device or sensor.
The telemetry provider (Multiplex MSB, Graupner/SJ HoTTv4, Futaba SBUS2) has to be set in the
ECU of the engine ( set this, using the GSU in the Limits menu).
Depending on which functionality the respective telemetry system provides, different data of the
Telemetry Adapter are transmitted to the receiver.
Connection diagram of the
Telemetry Adapter to ECU V10.0
Page 6 / 31
Connection of the Telemetry Adapter to the ECU
Connection to the ECU V6.0
The software version of the ECU V6 must be at least V6.3S or higher!
Connection diagram to the LED board of a V6-ECU:
Connection to the ECU is done via
an 8-pin cable to the LED board
Page 7 / 31
Connection to the ECU V10
The software version of the ECU V10 must be at least V10.3S or higher!
Connection to the ECU is done via an 6-pin cable
Attention: Do not accidentally plug in the 6-pin cable into the 8-pin bush of the Telemetry
Adapter!!!
Connection to the Futaba S.BUS2 receiver
Connection to the Graupner HoTT receiver
Connection to the Multiplex MSB receiver
Page 8 / 31
Setting the ECU to the desired telemetry provider/type
After the Telemetry Adapter was connected to the ECU, the GSU can be used to set the ECU to the
desired telemetry type.
Proceed as follows:

Completely connect the system (ECU, engine, receiver). For this, pay attention to the
respective connection diagram of the affected ECU and engine.

Switch off ECU ( switch off receiver, if the display of the GSU is still active thereafter,
press the “Set” and “Run” button on the GSU at the same time. This will switch off a ECU
that is possible in self holding mode)

Switch on ECU ( switch on receiver power supply)

After the ECu has booted up, press the “Limits” button on the GSU ( Limits menu will be
opened).

Now, using the “+/-” keys of the GSU scroll through the Limits menu until the parameter
“Telemetry” is displayed.

Now, press and hold the “Change value” key on the GSU and using the +/- keys select one
of the following options:
NOT USED
Futaba SBUS-2
Graupner HOTT
MPX M-Link1
Jeti
MPX M-Link2
(Telemetry switched off / not used)
(Futaba SBUS-2 Mode)
(Graupner HOTTv4 Mode)
(Multiplex Sensor Bus, MSB Mode, old transmitter)
Jeti Mode
(Multiplex Sensor Bus, MSB Mode for new transmitter)

Let go of the “Change value” key  Telemetry Type is saved.

Now completely switch off the ECU and switch on again. This activates the newly set
telemetry mode.
The version number of the Telemetry Adapter is
automatically shown, if correctly detected.
Here: V7.8 connected
Page 9 / 31
If not detected, “------” is
shown!
Futaba S.BUS2 Mode
After the Futaba S.BUS2 System was selected as telemetry type, the JetCat telemetry sensor on the
Futaba transmitter has to be registered as new sensor. The JetCat Telemetry Adapter hereby
occupies 14 of the 32 maximum possible sensor data (=time slot) of the SBUS2 system.
For this proceed as follows:
Registering the JetCat Telemetry Adapter as new S.BUS2 sensor on the Futaba transmitter
First switch off the receiver power supply and thereby also the ECU!
Plug connections to register the Telemetry Adapter as new sensor:
For this, the output of the Telemetry Adapter has to be connected with the programming jack of
the Futaba transmitter (presently on the bottom of the transmitter, see photo T18MZ).
Connections with transmitter variant A
Power supply via the ECU
For this, the complete system must be wired with the ECU.
Only difference: The telemetry cable which usually goes to the receiver is being pulled and instead
plugged into the programming jack of the transmitter. There must not be any other connection of
this signal e.g. to a receiver!
After all connections have been provided, the receiver power supply can be switched on
 The ECU switches on  the Telemetry Adapter is supplied with power via the Bus connection
cable.
Page 10 / 31
Connections with transmitter variant B
Power supply via separate battery (4.8-10 V)
For this, a suitable battery is connected to the second free output of the Telemetry Adapter, this
supplies the adapter with the required operational voltage.
The telemetry cable usually connected to the receiver is plugged in the programming jack intended
for the programming process on the transmitter.
There must not be any other connection of this signal e.g. to a receiver!
The ribbon cable to the ECU system does not have to be plugged in.
About the programming
jack on the transmitter
Page 11 / 31
Register process using the T18MZ as an example
After the connections have been provided according to
variant A or B (see above), the registering of the sensor
(=Telemetry Adapter ) via the transmitter can continue.
In both cases, the telemetry cable which normally leads
to the receiver has to be plugged into the programming
jack on the transmitter.
The photo to the left shows the required connection in
case of variant B (supply via separate battery) to the
T18MZ transmitter.
Programming jack on the
transmitter (bottom)
To register a new sensor, refer to the user manual of the Futaba transmitter, if required.
Important: Install current software on the transmitter, on older software the JetCat sensor might
not be supported!
Click here to start the
registering process
Page 12 / 31
After successful registration the overview of the registered sensors looks something like this or
similar:
As can be seen, in total 14 time slots are occupied.
Connection of the JetCat Telemetry Adapter to the S.BUS2 of the Futaba receiver
After the JetCat Telemetry Adapter has been successfully registered as new sensor on the
transmitter, it can now be connected with the Futaba receiver:
Throttle
(= gas channel)
Page 13 / 31
Transmitted data (Futaba S.BUS2 mode)
The JetCat telemetry sensor sends the following values/information to the S.BUS2 telemetry
system:
Value/designation
Engine actual speed in rpm
EGT, Exhaust gas temperature in °C
Pump voltage in V
Engine set speed in rpm
Thrust in N
Remaining fuel in ml
Fuel consumption in ml/min
Flying height in m
Fuel quality
Voltage of engine battery in V
Current consumption
Airspeed in km/h
Engine state and error codes
Speed of 2nd shaft
Remarks
Only on ECU V10.0 or higher, otherwise 0
Only on P90-RXi /P140-RXi /P180-RXi
Only on ECU V10.0 or higher, otherwise 0
Only with the connected Airspeed sensor,
otherwise 0
Only on 2-shaft or helicopter engines
Page 14 / 31
Example representation of JetCat telemetry values in the Futaba transmitter T18MZ
For this, open the telemetry menu of the transmitter...
Page 15 / 31
Graupner HoTT Mode
After the Graupner HoTT mode was selected as telemetry type the JetCat Telemetry Adapter can
be connected to a suitable Graupner HoTT receiver.
The JetCat Telemetry Adapter logs on to the transmitter as “GAM module” (General Air Module).
Here, only the so-called graphic mode of GAM sensor type is used at the moment.
Connection of the JetCat Telemetry Adapter to a Graupner HoTT receiver
Telemetry input of
the receiver
Output of Telemetry Adapter.
Further sensors can be connected on the
second plug connection.
Throttle
(= gas channel)
Page 16 / 31
Transmitted data (Graupner HoTT mode)
The JetCat Telemetry Adapter logs on to the transmitter as “GAM module” (General Engine
Module).
The following values/information is transmitted to the HoTT telemetry system:
Value/designation
Cell voltage 1-3 of the engine battery
Voltage of engine battery in V
Pump voltage in V
EGT, Exhaust gas temperature in °C
Ambient temperature in °C
Remaining fuel in %
Remaining fuel in ml
Engine actual speed in rpm
Flying height in m
Current consumption
Engine battery capacity in mAh
Airspeed in km/h
Speed of 2nd shaft
Remarks
Only on engines with connected BMS (=Battery
Management System), otherwise display of 0
On temperatures below 220 °C the value in the
display of the transmitter is shown “unaltered”.
On real measurement values over 220 °C, the
displayed value is shown divided by a factor of 10.
The reason for this is that from the HoTT protocol
unfortunately only values between -20 and + 235 °C
are possible for temperature values.
To be able to show values above this range this
“trick” has been resorted too.
In practice, this means the following:
If the engine is switched off, the temperature is
displayed correctly (because the temperature will
probably always be below 220 °C).
When the engine is running, the value displayed
must be multiplied by 10 to obtain the real
temperature (for example, a display of 48 °C then
means effectively 480 °C exhaust gas temperature)
Temperature at front on the engine housing
0—100 %
Only on ECU V10.0 or higher, otherwise 0
Only on ECU V10.0 or higher, otherwise 0
Will be updated only in engines with generator
function, otherwise e.g. 2100 mAh
Only with the connected Airspeed sensor,
otherwise 0
Only on 2-shaft or helicopter engines, otherwise 0;
Will be transmitted but unfortunately is presently
not shown by the transmitter software!
Page 17 / 31
Example representation of JetCat telemetry values in the Graupner MC32 transmitter T18MZ
As already explained, simulates the JetCat Telemetry Adapter a Hott General Engine module.
This produces in the transmitter the in the following images shown graphical telemetry displays.
The JetCat Telemetry Adapter uses this fixed predetermined Graupner display screens to visualize
the operating data of a JetCat engine.
Remaining fuel amount as
bar graph and text
“ON” is shown if the engine is
running and the thrust control is in
the hands of the pilot
Flying altitude
Voltage engine battery
Voltage of engine battery is
9.1 V
Pump voltage (1.9 V)
Current consumption from
the engine battery 0.1 A
Engine exhaust gas
temperature
+58 means here effective
580 °C exhaust gas
temperature
Capacity engine battery
2100 mAh
Intake temperature +20 °C
Cell voltage of the engine
battery (only with BMS)
engine speed 83300 rpm
Page 18 / 31
Voltage engine battery
ins9.1 V
Capacity engine battery
2100 mAh
Voltage engine battery is
9.1 V
Current consumption from
the engine battery is 0.2 A
Capacity of engine battery
2100 mAh
Remaining fuel amount as
bar graph and text
Voltage of engine battery is
9.1 V
Exhaust gas temperature
580 °C
Page 19 / 31
Pump voltage 1.8 V
Intake temperature +20 °C
Engine speed: 96200 rpm
Maximum measured engine
speed: 124700 rpm
Measured flight speed via
air pressure sensor
(AirSpeed Sensor) 268 km/h
Page 20 / 31
Multiplex Sensor Bus, MSB Mode
Connection of the JetCat Telemetry Adapter to a Multiplex MSB receiver
The output of the Telemetry Adapter is connected with the telemetry input of the receiver.
More MSB sensors can be connected on the second (parallel) outputs of the Telemetry Adapter.
In this case, it should be noted that the JetCat Telemetry Adapter already occupies fixed the
addresses 3 to 14/15!
Data transmitted (Multiplexed MSB mode “MPX M-Link1” for older transmitters)
At the moment the following fixed MSB addresses and values assignments are used/occupied:
Address
3
4
5
6
7
8
9
Value/designation
Engines actual speed in rpm
EGT, Exhaust gas temperature in °C
Pump voltage in V
Voltage engine battery in V
Current consumption
Battery capacity in mAh
(engine battery)
Remaining fuel in ml
10
Remaining fuel in %
Remarks
An alarm is initiated during undervoltage
Will be updated only in engines with generator
function, otherwise display fixed on e.g. 2100 mAh
An alarm is initiated once the calculated
remaining fuel amount drops under the value
programmed in the ECUs Limits menu under
“LowFuel Limit”.
An alarm is initiated once the calculated
remaining fuel amount drops under the value
programmed in the ECUs Limits menu under
“LowFuel Limit”.
Page 21 / 31
11
Speed of 2nd shaft
12
13
Flying height in m
Airspeed in km/h
14
Internal engine state 0-3
0: OFF
1: Starting/cranking
2: At idle, it is waited that the stick
is moved to idle.
3: Normal operation
Only on 2-shaft or helicopter engines
An alarm is issued once the sensor of the second
shaft has a fault
Only on ECU V10.0 or higher
Only if the connected Airspeed sensor is active,
otherwise 0.
An alarm is initiated once the measured speed
exceeds the value programmed in the ECUs
Limits menu under “Max.AirSpeed”.
This value is shown as % LQI since the multiplex
system currently does not allow for clear text
display.
An alarm is initiated once the engine enters into
state “0” = OFF.
Example views of telemetry values in the Multiplex transmitter
Example: Alarm, since the speed was exceeded
Page 22 / 31
Data transmitted (Multiplexed MSB mode “MPX M-Link2” for newer transmitters)
At the moment the following fixed MSB addresses and values assignments are used/occupied:
Address
3
4
5
6
7
8
Value/designation
Engines actual speed in rpm
EGT, Exhaust gas temperature in °C
Pump voltage in V
Voltage of engine battery in V
Current consumption
Battery capacity in mAh
(engine battery)
9
Remaining fuel in ml
10
Remaining fuel in %
11
Speed of 2nd shaft
12
13
Flying height in m
Airspeed in km/h
14
Internal engine state
Will be updated only in engines with
generator function, otherwise display fixed on
e.g. 2100 mAh
An alarm is initiated once the calculated
remaining fuel amount drops under the value
programmed in the ECUs Limits menu under
“LowFuel Limit”.
An alarm is initiated once the calculated
remaining fuel amount drops under the value
programmed in the ECUs Limits menu under
“LowFuel Limit”.
Only on 2-shaft or helicopter engines
An alarm is issued once the sensor of the
second shaft has a fault
Only on ECU V10.0 or higher
Only if the connected Airspeed sensor is active,
otherwise 0.
An alarm is initiated once the measured speed
exceeds the value programmed in the ECUs
Limits menu under “Max.AirSpeed”.
Display in clear text in the telemetry display
Last reason for switching off
An alarm is initiated once the engines enters
into state “0” = OFF.
Display in clear text in the telemetry display
15
Remarks
An alarm is initiated during undervoltage
Page 23 / 31
Jeti Telemetry Mode
The JetCat telemetry sensor transmits its data in Jeti mode to a connected receiver in the so-called
"JETIBOX / Sensor" protocol.
That means that the JetCat telemetry adapter must be connected to an input labeled "Ext." on the
receiver (or Jeti Expander).
Some Jeti receivers (e.g., REX3) have other free configurable inputs and these inputs must then be
set to "JETIBOX / Sensor" mode for use with the JetCat Sensor (not "EX-Bus" !!!).
Up to two JetCat telemetry adapters are connectable to a receiving system via e.g. a Jeti Expander
or a receiver with at least 2x "JETIBOX / Sensor" compatible inputs (Multi-turbine-operation). It
should be noted however, that the Jeti system currently supports "only" 30 telemetry values
(possibly this will change in future). If you use 2x JetCat turbines, you may not be able to add any
more sensors because a JetCat sensor will already deliver up to 15 telemetry values to the
transmitter!
Register the JetCat telemetry adapter on the Jeti transmitter
Once the Jeti system has been selected as the telemetry type (see page 9), the first step is to read
in (register) the JetCat telemetry sensor on the Jeti transmitter.
Proceed as follows: (example, Jeti DS-16 transmitter)
1. Connect the system according to the diagram and set the JetCat adapter to Jeti mode.
2. Switch on the transmitter + receiver (ECU also turns on).
3. Now call up the menu item "Stopwatches / Sensors" from the main menu of the
transmitter.
Page 24 / 31
4. Then call up the menu item "Sensors / Recording".
5. In the now opening screen, press the function key "Auto".
6. The following query "Reset telemetry", confirm with "Yes".
7. An automatic "scan" of all connected sensors now takes place. After a short time the JetCat
sensor should be found and displayed in the transmitter like this or similar:
Page 25 / 31
Select sensor values for display
After the JetCat Telemetry Adapter is now recognized and integrated by the system, individual /
several / all sensor values can be transferred to the main display screen of the transmitter.
Proceed as follows: (example: Jeti DS-16 transmitter)
1. Again call up the menu item "Stopwatches / Sensors" from the main menu of the
transmitter:
2. In the submenu "Stopwatches / Sensors" select the menu item "Telemetry display":
3. In the "Telemetry display" menu, use the "+" button to add the desired sensor values one
after the other.
Page 26 / 31
4. The newly selected values are then displayed in the main screen of the transmitter.
To do this, exit the menu by pressing the "ESC" key several times, if necessary, until the
main screen is displayed.
This display will look like the following example:
Example Presentation of JetCat telemetry values in the Jeti-DS-16 transmitter
Page 27 / 31
Submitted data (Jeti mode)
The JetCat Telemetry Adapter sends the following values / information to the Jeti Telemetry
System:
Pos.
1
Value /
designation
EGT
2
3
4
Rpm
Pump
EngBattery
5
EngCurrent
6
BattCapa
7
State/Flags
8
RestFuel
9
10
FuelFlow
Altitude
11
Thrust
12
13
RpmSet
AirSpeed
Remarks
exhaust temperature in °C
Over temperature will be alerted with Morse code „D“
Turbines actual speed in 1/min
pump voltage in V
Voltage of the turbine battery in V
If the battery goes into low voltage, alarmed with Morse code „B“
current consumption in A
Only at ECU V10.0 or higher
Battery capacity in mAh (turbine battery)
Only for turbines with generator function (e.g. P220RXi; P180-NX)
Turbine condition and error codes
0: Turbine Off
1000: Turbine is starting
2000: Turbine is idling, system is waiting for the throttle stick to idle.
3000: Turbine is running, normal operation
Additional error codes are transferred in the lower 3 digits:
1: Temperature sensor defective
2: Air bubbles detected in the fuel
4: Airspeed > Max
8: Speed limiter active
16: Speed limiter 2nd-shaft active
32: Turbine battery weak
64: Speed sensor 2nd-shaft defective
128: Fuel quantity below warning threshold
Fuel remaining in ml
If the calculated residual fuel quantity falls below the value programmed
in the ECU, it will be alerted (Morse code „C“).
ECU Limits Menu  Parameter: „ LowFuel Limit“
Fuel flow in ml/min
Altitude in m
Only at ECU V10.0 or higher
Thrust in N.
Not available for 2nd-shaft turbines
Turbines target speed in 1/min
Airspeed in km/h (TAS, true airspeed)
Only with airspeed sensor connected to ECU, otherwise “0”
If the maximum speed programmed in the ECU is exceeded, it will alarm.
ECU Limits Menu  Parameter: „MAX LimitAirSpd“
Page 28 / 31
14
Rpm-2
15
FuelQuality
2nd shaft speed (propeller speed for turboprops or main rotor speed for
helicopter turbines)
Only available with 2nd-shaft turbines or helicopter turbines
Fuel quality indicator
Only at P90-RXi /P140-RXi /P180-RXi Turbines.
If the fuel quality is bad ("air bubbles"), it will be alerted (Morse code „F“)
Which of these values are effectively available is automatically defined via the connected turbine /
ECU or specified by the JetCat system.
For example, in a 2nd-shaft turbine, no thrust values available. For pure jet turbines, no 2nd shaft
speed is available, etc.
Page 29 / 31
Alarms Jeti
In the case of the following errors or events, the JetCat telemetry adapter sends an automated
"alarm" to the Jeti transmitter via the so-called "Morse code" or error code:
Error code
(Morsecode)
A
B
C
D
E
F
description
recurrence
Turbine off
Low voltage of the turbine
battery
Calculated residual fuel is below
the warning threshold
programmed in the ECU (GSU,
Limits menu, Parameter
„LowFuel Limit“
Over temperature
1x
approx. every 15 seconds as long
as the error is present
every 20 seconds, only while the
turbine is running.
After switching off the turbine, the
alarm is suppressed.
Airspeed (Airspeed Sensor)
greater than the value
programmed in the ECU
Air bubbles detected in the fuel
as long as the turbine is running,
and the fault is active
as long as the error is active.
Only available with AirSpeed
sensor connected
as long as the turbine is running
and error is active.
Only at P90-RXi /P140-RXi /P180RXi Turbines available
G
Turbine is started
1x
The evaluation of these signals / errors or a reaction with correspondingly suitable announcement
texts can then be set via the Jeti transmitter menu.
Page 30 / 31
Ingenieurbüro CAT, M. Zipperer GmbH
Wettelbrunnerstraße 6
D-79282 Ballrechten- Dottingen
Germany
Phone: + 49 (0) 76 34-5056-800
Fax: + 49 (0) 76 34-5056-801
Info@cat-ing.de
www.jetcat.de