MGL Avionics Blaze EMS-2 User manual

Introduction
The Blaze EMS-2 is a 3 1/8” (80mm) universal engine monitor olor display instrument. The EMS-2 ontains all the
ne essary fun tionality to repla e several engine monitoring instruments.
All information is displayed in an easy to read format on a high resolution wide viewing angle 2.6” 600 d/m2 sunlight
readable olor display.
The EMS-2 light weight, small size and high level of fun tionality makes it an ex ellent hoi e for all types of engines. The
EMS-2 an also interfa e dire tly to UL Power engines via the RS232 port.
The EMS-2 an also be interfa ed via the CAN bus to an optional external RDAC unit (Remote Data A quisition
Computer). This allows for easier installation as the RDAC unit is normally mounted in the engine ompartment.
Blaze EMS-2
Universal Engine Monitoring System
Operating Manual – English 1 10

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1 Features
•Large 2.6” high resolution 320x240, IPS (fully viewa le in all directions), sunlight reada le color LCD
display
• The engine display screen is automatically configured to optimize screen space depending on what
engine parameters have been selected
• Optional External RDAC (Remote Data Acquisition Computer) interfacing via the CAN bus
• Standard 3 1/8” (80mm) aircraft enclosure (can be front or rear mounted)
• Rotary control plus 2 independent buttons for easy menu navigation and user input
• An external output activates when an alarm condition has been reached
• Includes a RS232 serial output for interfacing to external equipment e g dataloggers etc
• Wide input supply voltage range of 8 to 30V DC
• 1 year limited warranty
EGT/CHT
• Can measure up to 4 thermocouple channels using the internal electronics or up to 12 thermocouple
channels using an optional external RDAC
• EGT/CHT Temperatures can be displayed in ºC or ºF from -100ºC to 1200ºC (-148ºF to 2192ºF)
• High accuracy: Built in thermocouple linearization curves and cold junction compensation
• Includes an EGT/CHT trend graph display of each thermocouple channel
• Records maximum EGT/CHT temperature reached for each channel
• Includes an engine leaning feature
• Includes an engine cruise feature
• Special Rotax 912/914 engine monitor mode utilizing the standard built in Rotax NTC CHT probes
RPM
• Single or dual RPM measurement
• Includes a magneto check function
• RPM can be displayed in RPM or in percentage
• Records maximum RPM reached for each channel
Fuel Flow (Uses RPM 2 Input)
• Single fuel flow measurement
• Fuel flow can be displayed in L/hr or in G/hr
Fuel Level
• Analog inputs can be used to measure fuel level
• Fuel level can be displayed in Litres or Gallons
• Standard automotive fuel level senders can be used, even with odd shaped tanks due to a comprehensive,
multi-point calibration system
Analog Inputs
• Can measure up to 4 Analog channels
• Analog channels are universal and can be configured to measure Pressure, Temperature, Current or Fuel
Level
• Current measurement requires a MGL Avionics Closed Loop Current Sensor
• Pressure can be measured using standard automotive resistive senders (e g VDO 2, 5 and 10Bar), Rotax
4-20mA senders as well as voltage output pressure senders (e g UMA)
• Temperature can be measured using standard automotive resistive senders (e g VDO, Westach) as well
as the MGL Avionics precision LM335 semiconductor sensor
• Fuel level can be measured using standard automotive fuel level senders, even with odd shaped tanks
due to a comprehensive, multi-point calibration system
• High accuracy: Built in linearization curves for common senders
• Analog channels can be programmed to a user defined curve for custom senders
• Supports the Rotax 4-20mA pressure sender as used in the 912/914 engines
• Temperatures can be displayed in ºC or ºF
• Pressure can be displayed in psi or bar
• Fuel level can be displayed in Litres or Gallons
• Records minimum and maximum values reached for each channel

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Manifold Pressure
• Manifold pressure can be displayed in millibar (mB) or in inches of Mercury (“Hg”)
• Records maximum MAP reached in permanent memory
• MGL Avionics RDAC-XF MAP required
Timers
• Displays both UTC (Zulu time) and local time
• Time is maintained by an internal lithium battery which can be replaced by the user
• Includes a settable Hobbs meter which is password protected
• Includes an engine running and flight timer
• Includes a programmable maintenance timer for scheduled routine engine maintenance
• Provides a 50 entry flight log that stores the start time and duration of each of the last 50 flights The flight
timer can either be started automatically or by using a front push button
Volts
• Can measure voltages up to 30V (compatible with both 12V and 24V aircraft supplies)
• Contains a programmable low/high voltage alarm to automatically detect alternator failures and bad
batteries
• Records maximum and minimum Volts reached in permanent memory
Current (RDAC connection)
• Uses the MGL Avionics Closed Loop Current Sensor to measure the aircrafts current load
• Records maximum and minimum current reached in permanent memory
UL Power ECU Display
• Displays engine information from the UL Power ECU (Engine Control Unit) via the RS232 port
• The EMS-2 has a dedicated UL Power ECU display screen
• Displays warning messages from the UL Power ECU
Rotax 912is (MGL Avionics CAN RDAC Required)
• Displays engine information from the Rotax 912is ECU via the RDAC-CAN interface
• The EMS-2 has a dedicated Rotax 912is display screens
• Displays Engine, Sensor and Device Status messages from the Rotax 921is ECU

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2 Layout
3 Main Displays
The EMS-2 display s reen is automati ally onfigured to optimize s reen spa e depending on whi h engine parameters
have been sele ted. The Timers display, Trend graph and Max Values display an be sele ted by rotating the rotary
ontrol.
F2 / Down Button:
Menu System: Softkey button
Normal Display: Enable/disable
Engine Leaning and Cruise mode
Sunlight readable color
graphic display:
Ba klight an be adjusted in the
menu system
Rotary Control (Up/Down) & Enter Button:
Press the rotary ontrol during the normal display s reens to a ess the menu system.
Rotate anti/ lo kwise for up/down menu s rolling. Rotate the rotary ontrol during the
normal display mode to view the Timers, Trend Graphs and the Max Values display.
F1 / Up Button:
Menu System: Softkey button
Normal Display: Start / Stop the
flight timer (Manual flight only)
3 1/8” (80mm) en losure.
Can be front or rear mounted
RPM / MAP / Volts / Fuel Flow display se tion
Analog Channel se tion
(Pressure / Temperature /
Current / Volts / MAP /
Fuel Level)
EGT/CHT display se tion

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RPM / MAP / Volts / Fuel Flow display section
The RPM / MAP / Volts display se tion will maximize the spa e a ording to whi h parameters are enabled.
Single RPM displayed
Volts only displayed
MAP only displayed
Single RPM and Volts displayed
Single RPM and MAP displayed
Dual RPM displayed, RPM 2 in per ent
Single RPM and Fuel flow
Analog Channel section (Pressure / Temperature / Current / Volts / MAP / Fuel
Level)
The Analog hannels display se tion will maximize the spa e a ording to whi h parameters are enabled. MAP and
Current an also be displayed in a bargraph format. If more then 2 parameters are displayed then the EMS-2 will alternate
the display at 2 se ond intervals.
EGT/CHT display section
The Blaze EMS-2 supports up to 4 thermo ouples (using the internal ele troni s) and up to 12 thermo ouples (using the
optional external RDAC). The EGT/CHT se tion will automati ally try and maximize the display area a ording to the
number of EGTs/CHTs sele ted. The EGT/CHT parameters an be onfigured in the “EGT SETUP” and “CHT SETUP”
menu.
The EGT/CHT number will highlight to the indi ated the temperature value if “HIGHEST” is sele ted. The EGT highlight
olor is magenta, and the CHT olor is yan.
High Caution
High Alarm
Maximum temperature
rea hed indi ator
Temperature unit
Indi ates highest value if
“HIGHEST” is sele ted or
the highlighted bar value
if “SCANNING” is sele ted
EGT group indi ator
CHT group indi ator

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3 1 Timers display
LOCAL:
Lo al time normally in ludes an offset from UTC time. The time offset an be setup in the “TIMERS SETUP” menu.
UTC:
This is also know as Zulu or GMT time. The UTC time an be set in the “TIMERS SETUP” menu.
FLIGHT:
The flight time is automati ally reset to zero when a new flight is started (manual or automati flight dete tion). The “:” will
flash when a flight is a tive. The flight timer an be started pressing the F1/UP key (Manual flight mode).
HOBBS:
The Blaze EMS-2 ontains a password prote ted Hobbs timer. The Hobbs time an be set to the urrent known engine
time in the “TIMERS SETUP” menu. The Hobbs timer will only in rement when the RPM is greater then the “HOBBS
RPM”.
MAINT: (Maintenance Timer)
This timer is set in engine hours and it will ount down to zero when the engine RPM is greater then the “HOBBS RPM”
value as set in the “TIMERS SETUP”. A good use for this fun tion is to set the hours until your next spark plug hange or
engine inspe tion.
The purpose of this fun tion is to assist you in determining remaining hours until maintenan e will be required. It is not
intended as a repla ement for the air raft's maintenan e log. It is therefore important that the air raft's maintenan e log
be maintained in the normal manner. You should further use your own dis retion in performing maintenan e earlier than
indi ated should any air raft performan e problems arise.
A maximum of 999 hours an be entered as a maintenan e interval. A reminder
message will appear on startup when zero hours are remaining. The reminder message
will disappear after the pilot presses any key. Engine running time for the purpose of the
maintean e timer is defined as the run time where the engine RPM is greater than the
“HOBBS RPM” value as set in the “TIMERS SETUP”.

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3 2 EGT/CHT Trend Graph display
This display an be a essed by rotating the rotary ontrol during the normal display mode. The trend graph displays the
last 160 se onds of EGT/CHT temperature readings.
3 3 Maximum Values display
This display an be a essed by rotating the rotary ontrol during the normal display
mode. Press the F1/Up button when the max values display is showing to reset the
maximum values.
3 4 Engine leaning mode
EGT information is also very useful for fuel mixture ontrol. As the fuel mixture is leaned,
so the exhaust gasses get hotter. This rise in temperature is a sign of in reased
ombustion effi ien y as the optimum mixture setting is approa hed. If the leaning
progresses past a ertain point however, the temperature will begin to drop. This
temperature drop is the result of redu ed energy output from the diminished fuel flow.
The best operating mixture for air raft engines is in the vi inity of this peak EGT reading.
The EMS-2 has a spe ial Leaning mode, whi h easily identifies the peak EGT ondition
allowing you to adjust your fuel mixture for best performan e.
Fuel mixture should be adjusted on e you have de ided on a suitable ruise power
setting (typi ally 70%). Press the F1/Up button on the main display to enable the engine
leaning mode. The "LEAN" label is displayed at the top of the main display to learly
differentiate it from the normal operating mode.
As the fuel mixture is slowly leaned past the point at whi h the temperature begins to
drop (by more than 10°C/15°F), the absolute EGT temperatures will hange to show the
EGT reading relative to this peak. The sequential order as ea h ylinder peaks is also
shown.
Leaning mode an be an eled by pressing the F1/Up button again.
Note: The maximum values are stored in non-volatile
memory and are recalled on power-up

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3 5 Engine cruise mode
On e in the ruise, press the F2/Down button to enable the Cruise Mode. The
"CRUISE" label is displayed at the top of the main display to learly differentiate it
from the normal operating mode. All EGT and CHT readings are immediately sampled
as referen e temperatures for the ruise.
The display then shows EGT and CHT values relative to this referen e temperature.
Cruise mode an be an eled by pressing the F2/Down button again.
3 6 Magneto check function
Press the F2/Down button on e you have rea hed your normal run-up RPM. The display
will show the RPM deviation from when the magneto fun tion was a tivated. Any RPM
drops will be displayed as a negative RPM value, a positive reading indi ates an
in rease in RPM.
Swit h the mag to left or right. The EMS-2 should display a negative (drop in) RPM.
Then swit h the mags to “Both”. The EMS-2 reading should go ba k to zero or near
zero. A problem should show up as an ex essive drop in one mag and the return to
zero or lose to zero in orre tly.
The EMS-2 will return to the normal display after 60 se onds or if any key is pressed.
3 7 Start / Stop flight display
Press the F1/Up button during the normal display mode
to manually start/stop a flight. This key is only a tive if
the EMS-2 is setup to sele t the manual flight option
under the “TIMERS” setup menu.

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4 Menu System
Press the rotary ontrol button during the normal display mode to enter the menu system. Use the rotary ontrol to
navigate through the menu system.

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4 1 Exiting the menu system
Press the F1/Up button to exit the menu system when the “EXIT” soft key is shown. All hanges made during navigation
of the menu system will be saved in non-volatile memory upon exiting. The instrument will not save any hanges if you
remove power before exiting the menu system.
4 2 Flight Timer
View Flight Log:
Use the rotary ontrol to view the next flight log entry.
Erase Flight Log:
Use this fun tion to erase the flight log stored in the EMS-2.
FLIGHT:
Sele t whether you want the EMS-2 to automati ally dete t a flight or whether the pilot must press the F1/Up button to
start/stop a flight. We re ommend you sele t automati flight dete tion either on RPM1 or RPM2.
T/O RPM:
This menu option is only shown if the “RPM1” or "RPM2" flight mode is sele ted. Enter the RPM take off threshold that
you want the flight timer to start in rementing.

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4 3 RPM 1 Setup menu option
Display:
Sele t if you want the RPM to be displayed in “RPM”, “PERCENT” or “OFF”.
RPM 100 :
Sele t the maximum value that you want the RPM to orrelate to 100%. This is only shown if “Percent” is sele ted for
display.
Display Max:
Sele t the maximum RPM that you want the RPM dial to show. This an give you in reased display resolution.
Display Min:
Sele t the minimum RPM that you want the RPM dial to show. This an give you in reased display resolution.
High Alarm:
This enables or disables the RPM high alarm.
High Alarm:
Enter the RPM threshold for when the high alarm must be a tivated. Any RPM value above this value will a tivate the
alarm.
High Caution:
Enter the RPM value for the high aution. This is the lower value of the upper yellow band.
Low Caution:
Enter the RPM value for the low aution. This is the upper value of the lower yellow band.

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Low Alarm:
This enables or disables the RPM low alarm.
Low Alarm:
Enter the RPM threshold for when the low alarm must be a tivated. Any RPM value below this value will a tivate the
alarm.
Pulses/Rev:
Enter the number of pulses per RPM. For engines with an uneven number of ylinders like three ylinder four stroke
engines you an enter values ontaining fra tions (usually 1.5 in this example). Most four stroke engines would generate
one pulse for every two revolutions per ylinder. A four ylinder automotive four stroke engine would thus generate 2
pulses per revolution. A typi al Rotax DCDI two stroke engine would generate 6 pulses per revolution. The well known
Rotax 912/914 engine generates one pulse per revolution.
Increment:
Sele t the step size between su essive RPM values eg. if the RPM value is 4003 RPM and the “RPM INCREMENT” is 5
then the a tual value shown is 4005 RPM.
Label:
Enter a label to suit your hannel so you an identify it easily.
Data:
Sele t the data sour e of the RPM signals. Options in lude internal (using the internal ele troni s within the EMS-2) or
from an optional external RDAC unit.
RDAC Address:
Sele t the CAN address of the RDAC unit.

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4 4 RPM 2 / Fuel Flow Setup menu option
The RPM-2 input an be used for RPM or fuel flow.
If RPM is selected for “MODE”
Mode:
Sele t if you want to display “RPM2” or “FUEL FLOW” or “OFF”
Display:
Sele t if you want the RPM to be displayed in “RPM”, “PERCENT” or “OFF”.
RPM 100 :
Sele t the maximum value that you want the RPM to orrelate to 100%. This is only shown if “Percent” is sele ted for
display.
Display Max:
Sele t the maximum RPM that you want the RPM dial to show. This an give you in reased display resolution.
Display Min:
Sele t the minimum RPM that you want the RPM dial to show. This an give you in reased display resolution.
High Alarm:
This enables or disables the RPM high alarm.
High Alarm:
Enter the RPM threshold for when the high alarm must be a tivated. Any RPM value above this value will a tivate the
alarm.

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High Caution:
Enter the RPM value for the high aution. This is the lower value of the upper yellow band.
Low Caution:
Enter the RPM value for the low aution. This is the upper value of the lower yellow band.
Low Alarm:
This enables or disables the RPM low alarm.
Low Alarm:
Enter the RPM threshold for when the low alarm must be a tivated. Any RPM value below this value will a tivate the
alarm.
Pulses/Rev:
Enter the number of pulses per RPM. For engines with an uneven number of ylinders like three ylinder four stroke
engines you an enter values ontaining fra tions (usually 1.5 in this example). Most four stroke engines would generate
one pulse for every two revolutions per ylinder. A four ylinder automotive four stroke engine would thus generate 2
pulses per revolution. A typi al Rotax DCDI two stroke engine would generate 6 pulses per revolution. The well known
Rotax 912/914 engine generates one pulse per revolution.
Increment:
Sele t the step size between su essive RPM values eg. if the RPM value is 4003 RPM and the “RPM INCREMENT” is 5
then the a tual value shown is 4005 RPM.
Label:
Enter a label to suit your hannel so you an identify it easily.
Data:
Sele t the data sour e of the RPM signals. Options in lude internal (using the internal ele troni s within the EMS-2) or
from an optional external RDAC unit.
RDAC Address:
Sele t the CAN address of the RDAC unit.
If Fuel Flow is selected for “MODE”
Mode:
Sele t if you want to display “RPM2” or “FUEL FLOW” or “OFF”
Unit:
Sele t if you want fuel flow displayed in L/Hr or G/Hr

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Label:
Enter a label to suit your fuel flow input so you an identify it easily.
K-Factor:
The K-Fa tor is the number of pulses generated by the fuel flow sender for one Litre of fuel. The dual range fuel flow
sender supplied by MGL Avioni s has a K-Fa tor of 7000 in the low flow mode (jet installed) and 1330 for the high flow
mode (no jet installed). You an use the K-Fa tor to alibrate your fuel flow sender. See the installation se tion for more
details on how to alibrate and install the fuel flow sender.
Mode:
Sele t if you want to measure fuel flow using a fuel flow sender or by using fuel inje tors.
Injector:
Sele t whether the EMS-2 fuel flow input is onne ted to the high or low side fired fuel inje tor.
Data:
Sele t the data sour e of the RPM signals. Options in lude internal (using the internal ele troni s within the EMS-2) or
from an optional external RDAC unit.
RDAC Address:
Sele t the CAN address of the RDAC unit.

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4 5 EGT / CHT Setup (Thermocouple Setup)
EGT / CHT Channels:
Sele t the number of EGT or CHT hannels you want to use. Choi es are from 1 to 4 (1 to 12 if using the optional
RDAC) . The temperature display will onfigure itself to make best possible use of the available display size. Please note
that the minimum number of EGT & CHT hannels that an be displayed is 1 and the maximum number of EGT and CHT
hannels that an be displayed is 4 (12 if using the optional RDAC).
Display:
A sele tion between “HIGHEST” or “SCANNING” an be sele ted. If “HIGHEST“ is sele ted then the urrent highest
thermo ouple temperature is displayed. If “SCANNING” is sele ted then the unit will y le through ea h thermo ouple at
a one se ond interval.
Display Max:
Sele t the maximum temperature that you want the EGT/CHT bargraph to show. This an give you in reased display
resolution.
Display Min:
Sele t the minimum temperature that you want the EGT/CHT bargraph to show. This an give you in reased display
resolution.
High Alarm:
This enables or disables the EGT/CHT high alarm.
High Alarm:
Enter the temperature threshold for when the high alarm must be a tivated. Any temperature above this value will a tivate
the alarm.

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High Caution:
Enter the temperature value for the high aution.
Probe:
Sele t if you are using a K-type, J-type or E-type thermo ouple probe for this hannel. All probes supplied by MGL
Avioni s are K-Type. J-types are sometimes used with Ameri an made CHT probes. All EGT probes are K-type. E-type
probes are seldom used.
Temp Unit:
Sele t whether you want the temperature to be displayed in degrees Celsius (ºC) or degrees Fahrenheit (ºF).
Data:
Sele t the data sour e of the themo ouples. Options in lude internal (using the internal thermo ouple amplifier and Blaze
onne tor) or from an optional external RDAC unit.
RDAC Address:
Sele t the CAN address of the external RDAC unit.
4 5 1 Special Rotax 912/914 probe mode
In this mode the Analog Channel 3 and Analog Channel 4 (or RDAC AUX 1 and AUX 2 analog input hannels) be ome
the Rotax CHT hannel 1 and CHT hannel 2 respe tively. All CHT setups must still be done under the “CHT SETUP”
menu.

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4 6 Analog CH1 to CH4 Setup
The 4 analog hannels are universal analog input hannels that an be used for pressure, temperature or urrent.
Only “CHANNEL 1” Setup is shown below, follow the same steps for Channel 2, 3 & 4
4 6 1 Pressure Setup
Mode:
Sele t the fun tion for the analog hannel. Options are “PRESSURE”, “TEMP”, “CURRENT”, “FUEL LEVEL” or “OFF”.
Type:
Sele t if you are using a resistive, voltage or urrent pressure sender.
If the “RESISTIVE” pressure sender is selected
Sender:
Sele t what type of resistive pressure sender you are using. Sele t “V O” for VDO / resistive senders, “USER” for a
ustom sender.
Model:
Sele t whi h VDO pressure sender you are using. A sele tion between a VDO 2, 5 or 10 Bar an be sele ted.

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If the “VOLTAGE” pressure sender is selected
Sender:
Sele t the type of voltage sender you are using. Sele t “UMA” for UMA senders, "0.5-4.5V" for voltage senders, or
“USER” for a ustom voltage sender.
Model:
For UMA senders sele t the UMA model number.
If the “CURRENT” pressure sender is selected
Sender:
Sele t the type of urrent sender you are using. Sele t “4-20mA” for Rotax 912/914 4-20mA sender or “USER” for a
ustom 4-20mA sender.
Pressure @ 4mA:
Enter the pressure spe ified at 4mA output.
Pressure @ 20mA:
Enter the pressure spe ified at 20mA output.
Menu options for all sender types
If the “USER" pressure sender is selected
Calibrate Sender:
If the sender type is set to “USER”, then use this menu option to alibrate your pressure sender. See se tion 4.2.3 for
more information.
Label:
Enter a label to suit your pressure hannel so you an identify it easily.
Unit:
Sele t whether you want to display the pressure in Bar, psi or psi(0.1). The psi(0.1) is for low range pressure senders e.g.
UMA 7PSI.
Display Max:
Sele t the maximum pressure that you want the bargraph to show. This an give you in reased display resolution.
Display Max:
Sele t the minimum pressure that you want the bargraph to show. This an give you in reased display resolution.
High Alarm:
This enables or disables the pressure high alarm.
High Alarm:
Enter the pressure threshold for when the high alarm must be a tivated. Any pressure above this value will a tivate the
alarm.
High Caution:
Enter the pressure value for the high aution. This is the lower value of the upper yellow band.

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Low Caution:
Enter the pressure value for the low aution. This is the upper value of the lower yellow band.
Low Alarm:
This enables or disables the pressure low alarm.
Low Alarm:
Enter the pressure threshold for when the low alarm must be a tivated. Any pressure below this value will a tivate the
alarm.
Data:
Sele t the data sour e of the pressure signal. Options in lude internal (using one of the analog hannels within the EMS-
2) or from an optional external RDAC unit.
RDAC Address:
Sele t the CAN address of the RDAC unit.
4 6 2 Temperature Setup
Mode:
Sele t the fun tion for the analog hannel. Options are “PRESSURE”, “TEMP”, “CURRENT”, “FUEL LEVEL” or “OFF”.
Sender:
Sele t what type of sender you are using. Sele t “V O 120” for a VDO 120 degree NTC sender, Sele t “V O 150” for a
VDO 150 degree NTC sender, “WESTACH” for Westa h 339 NTC sender, “MGL” for a MGL NTC sender, “LM335” for a
MGL pre ision temperature sender or “USER” for a ustom sender.
If the sender type is set to “USER"
CALIBRATE SENDER:
If the sender type is set to “USER”, then use this menu option to alibrate your pressure sender. See se tion 4.2.3 for
more information.