DMA MPS49 User manual

CM170407AMA
D. MARCHIORI S.R.L.
Address: via Pontina km. 43.856 - 04011 Aprilia ( T) Italy
tel: [phone] – fax: [phone]
e-mail: [email protected] Internet: http://www.dma-aero.com
This Document is the property of D. Marchiori s.r.l., and may not be copied or otherwise reproduced,
communicated in any way to third parties nor stored in any data processing system without the
express written authority of D. Marchiori s.r.l.
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MPS49
AIR DATA TEST SET
OPERATING
MANUAL

CM170407AMA
CONTENTS
SECTION 1 PRELIMINARY............................................................................................................................. 6
1.1 SAFETY................................................................................................................................................. 6
1.2 WARNING............................................................................................................................................. 6
1.3 PRESSURE........................................................................................................................................... 6
1.4 TOXIC MATERIALS.............................................................................................................................. 6
1.5 MAINTENANCE AND REPAIR............................................................................................................. 7
1.6 INFORMATION AND ADVICE.............................................................................................................. 7
1.7 NOTE..................................................................................................................................................... 7
1. IMPORTANT NOTES............................................................................................................................ 7
1.9 GETTING STARTED............................................................................................................................. 7
1.9.1 INTERNA BATTERY.................................................................................................................... 7
1.9.2 BATTERY CHARGING.................................................................................................................. 7
1.9.3 INTERNA EAK TEST................................................................................................................. 8
1.9.4 DMA ADAPTOR KIT USE.............................................................................................................. 8
1.9.5 STATIC & PITOT PORTS SEA S................................................................................................. 8
1.9.6 VACUUM AND OVERPRESSURE GENERATION.......................................................................8
1.9.7 28V DC SUPP Y........................................................................................................................... 8
1.9.8 FIE D A TITUDE.......................................................................................................................... 8
1.9.9 INTERNA HEATER...................................................................................................................... 8
SECTION 2 GENERAL INFORMATION..........................................................................................................9
2.1 MAIN PARTS........................................................................................................................................ 9
2.2 MAIN TECHNICAL SPECIFICATION................................................................................................... 9
2.2.1 FUNCTION.................................................................................................................................... 9
2.2.2 RANGE, ACCURACY.................................................................................................................. 10
2.2.3 POWER....................................................................................................................................... 11
2.2.4 PRESSURE MEDIA..................................................................................................................... 11
2.2.5 MEASURE UNITS....................................................................................................................... 11
2.2.6 PHYSICA SPECIFICATIONS.................................................................................................... 12
2.2.7 ENVIRONMENTA IMITS......................................................................................................... 12
2.2.8 CA IBRATION............................................................................................................................. 12
2.2.9 START-UP TIME......................................................................................................................... 12
2.2.10 CONTRO CAPABI ITY WITH INTERNA PUMPS.................................................................12
2.2.11 PROTECTION........................................................................................................................... 12
2.2.12 EXTERNA SUPP Y PORTS....................................................................................................13
2.2.13 OPTIONA MU TIP E ISO ATOR FUNCTION........................................................................13
2.2.14 ADDITIONA CONNECTIONS..................................................................................................13
SECTION 3 CONTROL KEYS AND TOUCH SCREEN.................................................................................16
SECTION 4 CONTROLLED UNITS, OPERATIONAL MODES, MENUS AND SCREENS...........................1
4.1 CONTROLLING AND DISPLAYING AERONAUTICAL OR PRESSURE UNITS...............................1
4.2 OPERATIONAL MODES..................................................................................................................... 19
4.2.1 CONTRO MODE........................................................................................................................ 19
4.2.2 MEASURE MODE....................................................................................................................... 19
4.2.3 VENT AND “AMBIENT PRESSURE REACHED” MODES..........................................................20
4.2.4 EAK MODE................................................................................................................................ 20
4.2.5 MODE IMITATIONS DUE TO OW BATTERY EVE .............................................................20
4.3 SCREENS........................................................................................................................................... 20
4.3.1 STATUS SCREEN....................................................................................................................... 20
4.3.2 EAK SCREEN............................................................................................................................ 21
4.4 MENUS................................................................................................................................................ 22
4.4.1 CHOICE MENUS......................................................................................................................... 22
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4.4.2 VA UE MENUS........................................................................................................................... 22
4.5 SELECTING MEASURE UNITS..........................................................................................................23
4.6 AOA DISPLAY.................................................................................................................................... 24
SECTION 5 START UP PROCEDURE..........................................................................................................25
SECTION 6 ENTERING AIR DATA TEST PARAMETERS...........................................................................26
6.1 ENTERING SPECIFIC COMMANDED VALUES................................................................................26
6.2 MACH NUMBER AND AIRSPEED/QC LIMITS..................................................................................26
6.3 ACOUSTIC ALARM FUNCTION.........................................................................................................27
SECTION 7 ADVANCED OPERATIONS....................................................................................................... 2
7.1 SPECIFIC PITOT PRESSURE VALUE COMMAND...........................................................................2
7.2 LEAK TEST......................................................................................................................................... 2
7.2.1 FREE-RUNNING EAK TEST..................................................................................................... 28
7.2.2 TIMED EAK TEST..................................................................................................................... 28
7.2.3 FU Y AUTOMATIC EAK TESTS.............................................................................................29
7.3 AUTOMATIC RETURN TO AMBIENT PRESSURE............................................................................30
7.4 PRECISION MEASUREMENTS..........................................................................................................31
7.4.1 OPERATION ON ARGE OR VERY SMA VO UMES............................................................31
7.4.2 DIFFERENTIA PRESSURE ZERO ADJUSTING AND U TRA- OW SPEED FUNCTION.......31
7.5 ENCODING ALTIMETER (OPTION)...................................................................................................32
7.6 ARINC 429 CONNECTION (OPTION)................................................................................................33
7.6.1 CONFIGURATION....................................................................................................................... 34
7.6.2 DISP AYING DATA COMING FROM THE ARINC 429 BUS......................................................34
SECTION CHANGING PRESET LIMITS....................................................................................................35
.1 GENERAL........................................................................................................................................... 35
.2 LOADING AND SAVING LIMITING VALUES..................................................................................... 35
SECTION 9 SAFETY MANUAL OPERATION...............................................................................................36
9.1 MANUAL VENT................................................................................................................................... 36
SECTION 10 SPECIAL FUNCTIONS............................................................................................................. 37
10.1 MACH NUMBER............................................................................................................................... 37
10.2 SETTING DISPLAY BRIGHTNESS.................................................................................................. 37
10.3 BATTERY LEVEL............................................................................................................................. 37
10.4 CENTER LINE CORRECTION.......................................................................................................... 37
10.5 VALVES FINE TUNING (MAP)......................................................................................................... 3
10.6 FINE TUNING FUNCTION................................................................................................................ 3
10.6.1 SAVING VARIAB E PARAMETERS.........................................................................................38
10.7 TRUE AIRSPEED.............................................................................................................................. 3
10. E.P.R. (ENGINE PRESSURE RATIO)...............................................................................................3
10.9 MULTIPLE ISOLATOR FUNCTION (OPTION).................................................................................39
10.9.1 BASIC USAGE: EAK CHECKING ON INDIVIDUA PORTS...................................................39
10.9.2 “SPECIA ” MU TIP E ISO ATOR FUNCTION........................................................................40
10.9.3 USAGE EXAMP E.................................................................................................................... 40
10.10 ALTITUDE AND AIRSPEED OSCILLATION (OPTION).................................................................41
SECTION 11 TEST PROFILES......................................................................................................................42
11.1 INTRODUCTION............................................................................................................................... 42
11.1.1 PROFI ES AND PROFI E RESU TS.......................................................................................42
11.1.2 MEMORY ORGANIZATION...................................................................................................... 43
11.2 ENTERING TEST PROFILES........................................................................................................... 43
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11.3 RUNNING TEST PROFILES............................................................................................................. 44
11.4 PROFILE RESULTS.......................................................................................................................... 45
11.5 EXAMPLE......................................................................................................................................... 46
SECTION 12 REMOTE CONTROL................................................................................................................ 4
12.1 WIRED CONNECTIONS................................................................................................................... 4
12.1.1 ETHERNET............................................................................................................................... 48
12.1.2 GPIB.......................................................................................................................................... 48
12.2 WIRELESS CONNECTIONS............................................................................................................. 4
12.2.1 B UETOOTH............................................................................................................................. 48
12.2.2 WI-FI.......................................................................................................................................... 49
SECTION 13 SPECIAL FUNCTIONS KEYS SUMARY.................................................................................50
SECTION 14 CALIBRATION......................................................................................................................... 51
14.1 GENERAL......................................................................................................................................... 51
14.2 CALIBRATION SERVICE................................................................................................................. 51
SECTION 15 ENCODING ALTIMETER CONNECTOR DETAIL...................................................................52
SECTION 16 MAINTENANCE, RETURN AND DISPOSAL INFORMATION................................................53
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FIGURES
FIG 1 MPS49 FRONT PANEL........................................................................................................................14
FIG 2 KEYBOARD LAYOUT.......................................................................................................................... 14
FIG 3 MPSRC REMOTE CONTROL..............................................................................................................15
FIG 4 KEYBOARD EXPLANATION............................................................................................................... 16
FIG 5 THE STATUS SCREEN (AERONAUTICAL UNITS)............................................................................1
FIG 6 OPERATIONAL MODE INDICATION, WITH AND WITHOUT AOA LABEL.......................................21
FIG 7 LEAK SCREEN IN AERONAUTICAL UNITS AND AOA SET TO ZERO............................................22
FIG THE MAIN MENU................................................................................................................................. 22
FIG 9 LIMITS MENU....................................................................................................................................... 23
FIG 10 SELECTION OF THE PRESSURE UNIT...........................................................................................23
FIG 11 LEAK TEST RESULTS SCREEN......................................................................................................29
FIG 12 THE ENCODING ALTIMETER TEST SCREEN.................................................................................33
FIG 13 THE ENCODING ALTIMETER RESULTS SCREEN.........................................................................33
FIG 14 THE ARINC SCREEN........................................................................................................................ 34
FIG 15 SCHEMATIC OF THE MANUAL VENTING VALVES........................................................................36
FIG 16 STATUS SCREEN SHOWING MACH NUMBER...............................................................................37
FIG 17 STATUS SCREEN SHOWING TRUE AIRSPEED.............................................................................3
FIG 1 STATUS SCREEN SHOWING EPR................................................................................................... 39
FIG 19 THE MULTIPLE ISOLATOR SCREEN..............................................................................................39
FIG 20 THE SPECIAL MULTIPLE ISOLATOR SCREEN..............................................................................40
FIG 21 OSCILLATION PARAMETERS.......................................................................................................... 41
FIG 22 THE PROFILE EDITING MENU.........................................................................................................43
FIG 23 THE PROFILE STEP SELECTION SCREEN.....................................................................................44
FIG 24 THE PROFILE STEP EDITING MENU...............................................................................................44
FIG 25 STATUS SCREEN WHILE RUNNING A TEST PROFILE.................................................................45
FIG 26 THE PROFILE RESULTS SCREEN................................................................................................... 46
FIG 27 WIRE DIAGRAM OF THE ENCODING ALTIMETER CONNECTOR.................................................52
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SECTION 1 PRELIMINARY
This manual contains the operating procedures for the MPS49 air data test set and is
suitable for both workshop and flight-line servicing.
1.1 SAFETY
The MPS49 is designed to be safe when operated in the manner described in this manual,
it should be used only in the described way and for no other purposes. The manual
contains Safety Instructions that must be followed, the instructions are either warnings or
cautions given to protect the Operator and the equipment from damage.
Use trained technicians and good engineering practices for all the procedures in this
manual.
1.2 WARNING
Potentially explosive atmospheres may occur during aircraft refuelling. This equipment is
not certified for use within potentially explosive atmospheres. An appropriate risk
assessment should be performed when this equipment is to be used on aircraft with
particular attention being given to the dangers arising from re-fuelling operations. Within the
EU, organisations operating equipment where potentially explosive atmospheres may occur
are required to conform to the ATEX 137 Worker Protection Directive, EU 99/92/EC.
Contact DMA for details of the ATEX certification standards applicable to the MPS range of
products.
The following warnings apply to the internal battery:
•do not attempt to invert the connection of the battery;
•do not disassemble, crush or puncture the battery;
•do not short-circuit the battery; if a short-circuit is detected or even just suspected,
remove the battery and leave it in a safe open place, away from other objects or
people, for at least 15 minutes.
•do not dispose of the battery in fire or water;
•do not expose the battery to temperatures above 60°C (140°F);
•keep the battery away from children;
•avoid exposing the battery to excessive shock or vibration;
•do not use a damaged battery;
•if the battery is leaking fluids, do not touch them; in case of eye contact with the
fluids, clean the eyes thoroughly with water for at least 15 minutes, and make sure
all fluid was washed away, then seek medical attention;
•disposal of battery must be done according to local regulations and laws; contact
your sales representative for more information.
1.3 PRESSURE
Never apply pressure greater than the maximum safe working pressure to the equipment.
1.4 TOXIC MATERIALS
There are no known toxic materials used in the manufacture or build standard of this
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MPS49. An internal rechargeable totally sealed battery is housed within the instrument and
is easily removable from the front panel.
1.5 MAINTENANCE AND REPAIR
The MPS49 is to be maintained and repaired using the approved procedures and be
carried out only by DMA authorized agencies or the manufacturer.
1.6 INFORMATION AND ADVICE
Contact the manufacturer, subsidiary or agent for further detailed technical advice.
1.7 NOTE
This Manual is applicable starting from SW Version 1.12.
1. IMPORTANT NOTES
• The manual vent valves on the front panel must be closed before the start of testing.
• Connect the ADTS to the static, pitot and AoA ports only after the start up procedure is
completed.
• For optimum operation and highest precision, the MPS49 should be operated with the
front panel face up.
• When transporting the MPS49 in an unpressurized aircraft, use the VENT/SEA valve
(if available on the case) to prevent damage, to keep the pressure inside and outside of
the case equal.
• It is recommended to mount the MPS49 at a height of 1 meter above floor level where
fuel vapor could be present, for example during re-fueling operations.
• The total volume of the pneumatic circuit of the MPS49 is small. When no pneumatic
load is connected to the ADTS, thermal effects could result in apparent leaks. The final
inspection and calibration procedures indicate rate values and stabilization times that
must be followed in order to compensate for thermal effects.
1.9 GETTING STARTED
Prior to using the MPS49 the following points should be considered.
1.9.1 INTERNAL BATTERY
The internal battery can be removed from the front panel. It is not strictly required for
operating the MPS49. However it also serves as an emergency back up system, to safely
return the instrument and aircraft system to ground conditions in the event of an external
power failure during testing.
1.9.2 BATTERY CHARGING
The internal Battery has an operational life of 2 hours when fully charged. On receipt of the
MPS49 the internal battery will require charging. Due to internal monitoring circuits, the
battery will slowly discharge when not in use. The battery is recharged whenever the
MPS49 is connected to an AC power supply.
The time needed to fully recharge the battery when connected to the AC supply is 2 to 3
hours.
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The battery should never over-discharge. When the MPS49 is not being used for long
periods of time, it is suggested to recharge the battery at least once every 6 months.
1.9.3 INTERNAL LEAK TEST
When carrying out a preliminary eak Test of the MPS49, in order to establish the correct
operation, it is very important to follow the altitude and airspeed rates that are indicated in
the MPS49 Calibration and Adjustment manual. Higher rate values could cause thermal
effects that would be detected as leaks. If it is not possible to control the indicated rates,
then the stabilization times must be longer, for example 30 minutes.
1.9.4 DMA ADAPTOR KIT USE
Certain DMA pitot static adapter kits require an external vacuum source, to keep the static
adapters fixed to the aircraft fuselage by means of vacuum cups. The MPS49 provides a
vacuum port on the front panel.
1.9.5 STATIC & PITOT PORTS SEALS
Do not use any tools to tighten the MPS49 pneumatics ports. The “AN” fittings on the
MPS49 front panel incorporate an O-ring seal, and only require finger-tight fastening.
For the replacement of the seals after a long period of use, use O-Ring series 2015, 2018
and 2031.
1.9.6 VACUUM AND OVERPRESSURE GENERATION
The MPS49 generates vacuum and pressure inside its internal reservoirs, for controlling the
Static, Pitot and AoA lines. The pumps only run when needed, in order to save power and
ensure a longer operational life.
1.9.7 2 V DC SUPPLY
The MPS49 can be optionally powered from a 28V DC power supply (option A0).
Use only cables marked “CBL110929GPA” for powering the MPS49 from a 2 V DC
supply! Other cables could damage the instrument.
1.9. FIELD ALTITUDE
The pressure control system of the MPS49 needs to know the altitude at which the unit is
operated. On dispatch from Production the Qfe is set to a value of 260 feet.
If the field altitude (“QFE” parameter) is not set correctly, the MPS49 may not be able
to control altitude values below the ambient pressure.
To set the correct field elevation value, follow the instructions given in the Calibration and
Adjustments Manual.
1.9.9 INTERNAL HEATER
The MPS49 can be equipped with an internal heater module (option W1), that allows
operating the unit at temperatures down to -20°C (-4°F).
At power-on, if the internal temperature is too low, the internal heater is started
automatically, and a message appears on the display. As soon as the internal temperature
reaches the minimum value for ensuring nominal operation, the ADTS carries out its regular
start-up procedure.
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SECTION 2 GENERAL INFORMATION
The DMA MPS49 is an automatically controlled low cost Air Data Test solution for
troubleshooting and certification of aircraft pitot-static systems with RVSM accuracy
requirements. It provides facilities for the simulation of altitude, airspeed and a third
pressure (Pd2), for testing Angle of Attack (AoA) smart probes. All rate values are also
controlled.
The MPS49 instrument is simple and fast to use. The operator interface is easy to
understand by both experts and first time users. All testing and troubleshooting with the
MPS49 is carried out via the touch-screen and an intuitively arranged color-coded keyboard
on the front panel (FIG 2).
The values of pressure, altitude, airspeed, AoA and associated rates are shown on the
color graphical CD display. Commanded and measured test values are simultaneously
displayed at all times.
The MPS49 is also compatible with the DMA MPSRC remote control (FIG 3), that provides
the same operating interface. The MPS49 is designed to reject any commanded values
which exceed pre-programmed limits. imiting values are password protected.
Test profiles can be programmed and automatically executed by the MPS49.
The Unit Under Test (UUT) is safely isolated in the event of any power loss.
The MPS49 incorporates two internal pump units for pressure and vacuum supplies. The
pumps only run when required, to save power and ensure a longer operating life.
2.1 MAIN PARTS
The MPS49 main parts are:
•Power supply.
•Static, Pitot and AoA lines pneumatic components.
•Electronic circuits, including microprocessor-based systems for pressure measurement
and control.
•Internal battery.
•High Performance Piezoresistive Pressure sensors.
•Compressor – vacuum membrane type pump units.
•Keyboard and Color Touch-Screen Display.
The front panel (FIG 1) provides operating controls and displays, pressure fittings and
connectors for external control.
The equipment is packaged within a lightweight HDPE (high density polyethylene) case.
2.2 MAIN TECHNICAL SPECIFICATION
2.2.1 FUNCTION
•Generation of pressure and vacuum sources using the internal pumps.
•Generation of static (absolute) pressure or altitude.
•Generation of total (absolute) pressure or dynamic (differential) pressure or airspeed.
•Generation of angle of attack as differential pressure (Pd2).
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•Simultaneous generation of altitude, airspeed and AoA.
•Simultaneous generation of altitude and airspeed, allowing the AoA ports to be used as
additional static ports.
•Generation of altitude rate (climb or dive) (feet/min).
•Generation of airspeed rate (increasing or decreasing) (knots/min).
•Generation of static (Ps) pressure rate (climb or dive) (hPa/min).
•Generation of dynamic (Qc) pressure rate (increasing or decreasing) (hPa/min).
•Generation of total (Pt) pressure rate (increasing or decreasing) (hPa/min).
•Generation of angle of attack (Pd2) rate (increasing or decreasing) (hPa/min).
•Generation of Mach number.
•Generation of Engine Pressure Ratio (E.P.R.) as Pt / Ps ratio.
•eakage test.
•Automatic Vent to ambient pressure.
•Maximum IMIT set values: the ADTS permits the simple setting of maximum values
(limits) to which the unit can operate. It is supplied at the time of delivery with the
following default values set by the manufacturer:
◦Max altitude: 50,000 feet.
◦Min. altitude: -1,500 feet.
◦Max. airspeed: 450 knots.
◦Max vertical speed: 3,000 feet/min.
◦Set airspeed rate: 300 kt/min.
◦Max. Mach number: 1.
◦Max AoA: ± 2.5 inHg.
•ow battery mode, allowing only pressure measurement and return to ambient
pressure.
•Automatic safety protection avoids negative Qc values (Ps < Pt) in airspeed and Qc
control modes.
2.2.2 RANGE, ACCURACY
Altitude
•Range: from -7,500 to 80,000 feet.
•Resolution: 1 foot
•Accuracy: ± 3 feet @ sea level;
± 7 feet @ 30,000 feet;
± 18 feet @ 50,000 feet.
Vertical speed:
•Range: from 0 to 50,000 feet/min.
The maximum value depends on the volume of the pneumatic load.
•Resolution: 5 feet/min below 1,500 feet/min, 1 foot/min on request.
•Accuracy: ± 1% of reading.
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Airspeed:
•Range: from 0 to 850 knots. Optional: 0 to 1,000 knots.
•Resolution:
◦standard: 1 knot below 50 knots;
0.1 knots above 50 knots;
◦Ultra- ow Speed: 1 knot below 20 knots;
0.1 knots above 20 knots.
•Accuracy: ± 0.8 knots @ 50 knots;
± 0.1 knots above 500 knots.
Airspeed rate:
•Range: from 0 to 500 knots/min.
The maximum value depends on the volume of the pneumatic load.
•Resolution: 10 knots/min.
•Accuracy: ± 10 knots/min ± 1% of reading.
Angle of attack (Pd2 differential pressure):
•Range: from -2.5 to +2.5 inHg (-85 to +85 hPa).
•Resolution: 0.001 inHg, 0.01 hPa.
•Accuracy: ± 0.003 inHg (0.10 hPa).
Mach number:
•Range: from 0 to 6 (limited by airspeed range).
•Resolution: 0.001.
•Accuracy: ± 0.002 @ sea level.
2.2.3 POWER
90 to 240 VAC and 50 to 400 Hz.
Maximum power consumption: 120 W.
Optional 28V DC (option A0) with cable “CB 110929GPA”.
An internal battery is included, providing 2 hours operation.
Maximum current output from the Encoding Altimeter connector (option B7):
•24V line (pins 1, 2): 300 mA;
•5V line (pin 5): 500 mA.
2.2.4 PRESSURE MEDIA
Air
2.2.5 MEASURE UNITS
The operator can change the default units as required. Upon request, DMA can deliver the
ADTS with different default units.
•Default Units are: feet, knots, hPa.
•The following additional aeronautical and pressure units are available by pressing the
appropriate key:
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◦for Altitude: meter and hectometer
◦for Pressure: inHg, mmHg, Pa, kPa, inH2O, p.s.i.
◦for Airspeed: mph and km/h.
2.2.6 PHYSICAL SPECIFICATIONS
Dimensions: W 22” x D 14” x H 9” (55.8 cm x 35.6 cm x 23 cm).
Weight: 33 lbs (16 kg).
2.2.7 ENVIRONMENTAL LIMITS
Temperature ranges:
•Operating: from -10°C to 50°C. Optional: -20°C to 50°C.
•Storage: from -20°C to 70°C.
•Extended range available on request.
CE compliant.
2.2. CALIBRATION
The MPS49 can be calibrated in-house, if desired: calibration is performed by software
adjustment only, and the parameters are password protected for security. No mechanical
adjustments are required to calibrate the MPS49.
Using a transfer calibration standard (for example the DMA's own PAMB11H), the MPS49
can be calibrated in typically less than 40 minutes. Please refer to the MPS49 Calibration
and Adjustment Manual for more information.
Stability of the calibration is better than 80 ppm full-scale over 2 years.
2.2.9 START-UP TIME
The MPS49 goes through an automatic self-test at each power-on.
The equipment is ready for operation about 180 seconds after power-on.
NOTE if the internal heater is installed, the start-up time could become longer, depending
on the ambient temperature.
2.2.10 CONTROL CAPABILITY WITH INTERNAL PUMPS
The control capability is optimized to allow allow up to 6,000 feet/min at 50,000 feet with the
following loads:
•Static line: 125 cu. in. (2 liters).
•Pitot line: 80 cu. in. (1.3 liters).
2.2.11 PROTECTION
The MPS49 comes equipped with built-in protection to safeguard the test set itself and the
instruments under test, ensuring there will be no more damaged instruments or air data test
set as so often occurred on older equipment.
The hardware is intrinsically safe:
•control valves are normally closed when not powered;
•manual vent valves never allow Pt < Ps.
The software also incorporates the following safety functions:
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•user-defined limits for all controlled values and rates;
•protection against Pt < Ps;
•protection against excessive leaks in MEASURE mode.
In case of AC power loss, the MPS49 automatically switches to battery operation.
If the battery is flat or not available, the static, pitot and AoA lines remain sealed.
When power is restored, the MPS49 senses the current pressure values and begins
controlling again.
In case of emergency, the manual venting valves enable the Operator to safely bring all
lines back to ambient pressure.
2.2.12 EXTERNAL SUPPLY PORTS
The MPS49 vacuum source is connected to a pneumatic port on the front panel. The port
supports the use of DMA adaptor kits with suction cups.
2.2.13 OPTIONAL MULTIPLE ISOLATOR FUNCTION
The MPS49 can be provided with up to four Ps, four Pt and four AoA connections.
The Multiple Isolator function enables the Operator to individually seal each port, to allow
advanced leak checking procedures and generation of different pressure levels.
2.2.14 ADDITIONAL CONNECTIONS
The MPS49 comes equipped with an RS232 port, that enables communication with an
external PC for remote control. Refer to SECTION 12 for more information. The MPSRC
also connects to the RS232 port.
One type A USB port is also provided on the front panel. The MPS49 enables transferring
profiles and profile results to and from USB pen drives.
An optional Encoding Altimeter connector enables the MPS49 to receive gray code input.
Additional data communication ports are available as options:
•IEEE 488 (GPIB);
•ARINC 429;
•Ethernet.
Finally, other connectivity options, such as wireless AN and Bluetooth, are available as
external dongles.
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FIG 1 MPS49 FRONT PANEL
1. Electrical ground connector
2. External power socket
3. AC power ED
4. Fuse
5. Power button
6. Drain valve
7. Drain button
8. Vacuum port
9. Battery compartment
10. Static line outputs
11. AoA line outputs
12. Pitot line outputs
13. Additional communication ports
14. RS232 port
15. Manual vent valves
16. Display
17. Keyboard
FIG 2 KEYBOARD LAYOUT
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1
2
3
4
5
7
8
6
9
10 11 12
13
15
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FIG 3 MPSRC REMOTE CONTROL
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SECTION 3 CONTROL KEYS AND TOUCH SCREEN
The Operator interacts with the MPS49 via the touch-screen and the 24-element keyboard
(FIG 2) on the front panel.
The color graphical CD display features a dot matrix of 480x272 pixels.
The MPSRC remote control (FIG 3) provides the same keyboard layout as the front panel,
and a color graphical CD touch-screen display, featuring a dot matrix of 320x200 pixels.
Four rows of keys provide access to all of the MPS43’s control and operational functions.
Keys are color coded for ease of use. A telephone format 0 to 9 keypad is included for entry
of target values.
All functions can be accessed using the keypad. The touch screen provides faster access
to some functions, depending on the current display mode.
FIG 4 KEYBOARD EXPLANATION
Rightmost – operation keys:
HA T: stops the pressure control and sets the current pressure values as targets. This
actions the stopping of a running test, while keeping the control system enabled and
actively compensating leaks.
MEAS: sets the MPS49 into MEASURE mode. The pressure control system is turned off,
leaving only the pressure measuring system active. This function is used to achieve extra
accuracy, because it avoids any controller-induced effects on the measured pressures.
CNTR: sets the MPS49 into CONTRO mode. The control system reaches and stabilizes
the Ps/altitude, Pt/airspeed and AoA targets.
NOTE MEAS and CNTR are the most frequently used keys in the general operation of the
MPS49.
The  and  keys are used to change the selection around the Status and eak screens,
and to navigate inside menus. The numerical keypad is used for data entry into the
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Confirm
entered value
Navigate the Cursor
around the screen
Data entry keypad
+
Additional functions
Carry out
EAK TEST
+
Vent system
to GROUND
Increase / Decrease
digit values
SHIFT to access
additional functions
Stop control and
hold the current
values
Enter
MEASURE mode
Enter
CONTRO mode

CM170407AMA
selected area of the screen.
SHIFT: has the same function as a shift key on a computer keyboard. It is used together
with other keys to command alternative key functions (e.g. SHIFT followed by 4 to activate
the “Remote mode”).
A summary of SHIFT key operations is shown in SECTION 13. Please note that the SHIFT
key must be pressed before other keys, and not at the same time. A small arrow appears
in the lower-left corner of the display while the SHIFT key is active.
The ENTER key is used to input desired data the MPS49. The operation is the same as the
“Enter” key on a computer keyboard.
BACKSPACE: is used to delete the last entered digit for correcting mistakes.
EAK: is used to automatically perform a leak test using the built in timer/stopwatch
function of the MPS49. The HA T, MEAS and CNTR end the leak test.
VENT (activated by pressing SHIFT then EAK in sequence) is used to vent the pressure in
the static and pitot lines to ambient pressure. This function enables the safe disconnection
of test lines from the aircraft / UUT at the end of testing. The MEAS and CNTR keys are
used to restore the MPS49 to the MEASURE and CONTRO modes respectively, after the
vent function has been activated. The HA T key interrupts the procedure and returns the
MPS49 to CONTRO mode.
The UP and DOWN triangle keys ▲ and ▼ are used:
•to increase or decrease the selected parameters (altitude, airspeed, rate etc.) by a
selected value;
•to navigate inside the menus;
•in the Display Screen, to adjust the display brightness (refer to paragraph 10.2).
Numerical keypad
The keypad is a standard telephone layout ten-number keypad. The numerical keys (0–9)
are used to enter any desired value for the various controlled parameters. After keying in a
number, the Operator must always press ENTER to confirm and commit the value into the
system.
NOTE For some optional operations, number keys may be used in combination ith the
SHIFT key, to access additional functions.
The 000 key is a shortcut to enter three consecutive zeros.
The decimal point key (.) is used to input decimal points when required (e.g. airspeed).
The minus key (–) is used to enter negative numbers (e.g. an altitude value below sea
level).
Entering text using the numerical keypad
The numerical keypad is also used to enter text data. Each key can be used to enter the
letters and symbols that are printed on the key itself. Press the key repeatedly to cycle
through all its symbols.
An empty space can be entered by pressing once the key '1'.
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CM170407AMA
SECTION 4 CONTROLLED UNITS, OPERATIONAL MODES, MENUS AND SCREENS
The MPS49 supports multiple operational modes, menus and screens.
•Modes are defined by the operating characteristics that are relevant during operation in
the specific mode.
•Screens refer to data that is shown on the CD display. Some screens may be read
only, not allowing parameters to be entered or changed.
•Menus are screens that contain a list of parameters and allow their values to change.
4.1 CONTROLLING AND DISPLAYING AERONAUTICAL OR PRESSURE UNITS
The MPS49 can display and control either Aeronautical Units (Au) (altitude and airspeed)
or Engineering Units, (Eu) pressures (static and dynamic).
For rate control:
•When controlling aeronautical units, the altitude and airspeed rates are controlled.
•When controlling pressures, the Ps and Qc/Pt rates are controlled.
The display settings are independent from the control mode. For instance, it is possible to
display static pressure while controlling altitude rate.
The controlled and displayed units can be changed by touching the Eu/Au button on the
status screen (FIG 5).
FIG 5 THE STATUS SCREEN (AERONAUTICAL UNITS)
•To change the display mode, select the altitude/Ps or airspeed/Pt/Qc values in the
left part of the screen;
•to change the control mode, select the altitude/Ps or airspeed/Pt/Qc rate values in
the right part of the screen;
then touch the Eu/Au button.
NOTE some automatic procedures (like returning to ambient pressure or valve mapping)
are only available in either pressure or aeronautical units. The Operator ill need to
s itch the MPS49 to the correct units before starting such procedures.
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Simulated / Actual
values
Commanded / Desired
values
Currently selected
value
Power status /
Operating Mode

CM170407AMA
When the ADTS is displaying or controlling Qc or Pt, the orange button Qc/Pt allows to
switch the display between differential Qc and absolute Pt values.
The AoA is always controlled as a differential pressure. The AoA rate can be set from the
imits Screen (refer to SECTION 8).
4.2 OPERATIONAL MODES
4.2.1 CONTROL MODE
This is the primary mode for control of the MPS49. Air data parameter entry and all the
operational/control functions are all performed in this mode. The main display used in this
mode is the status screen (FIG 5).
While the MPS49 is in the CONTRO mode, the internal pumps are running when required
by the control system.
Entry to the CONTRO mode is by pressing the CNTR or HA T keys. The latter also
changes the commanded values to the currently simulated pressures.
NOTE hen the battery level is lo , the MPS49 ill automatically s itch from CONTROL
to MEASUREMENT mode. It ill not be possible to s itch back to CONTROL mode
until the MPS49 is connected to AC po er. Refer to paragraph 4.2.5 for more
details.
When the simulated values are very close to the commanded values, the MPS49 shows
“Stabilization” in the lower-left corner of the screen. The parameters of this indication can
be tuned; please refer to the Calibration and Adjustment manual for more information.
4.2.2 MEASURE MODE
The MEASURE MODE is used to place the system into the mode where only the pressure
measuring system is active and the control system is turned off. The unit under test (UUT)
becomes completely isolated from the pressure generator, and precise measurements can
be obtained when the line pressures in the UUT under test are stabilized. Whenever a
precision measurement is required, in particular when large volumes are involved, the
MEAS function should be used: all control functions are disabled and only sensor
measurement functions are active. The MEASURE mode can be accessed from all menus.
Entry to the MEASURE MODE is by pressing the MEAS key.
CAUTION When the MPS49 is in MEASURE or LEAK mode of operation, the MPS49
may automatically s itch to CONTROL mode if a problem is detected; for
example, a high altitude leak or a negative Qc pressure. It is possible to
permanently store the values that trigger such operation; if desired, consult
the MPS49 Calibration and Adjustment Manual.
CAUTION The automatic protection against negative Qc pressure values is not active
hile the ADTS is in Pt control mode, allo ing greater versatility hen the
instrument is being used in a non pitot static test application.
Different measure modes
The MPS49 supports mixed MEASURE and CONTRO modes for particular leak testing
procedures.
By pressing the MEAS key repeatedly, it is possible to change the state of the control
system among the MEASURE, “STATIC MEASURE” and “DYNAMIC MEASURE” modes.
•In STATIC MEASURE mode, the altitude/Ps channel stays in MEASURE mode,
while the airspeed/Qc channel remains under control.
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•In DYNAMIC MEASURE mode, the airspeed/Qc/Pt channel stays in MEASURE
mode, while the altitude/Ps channel remains under control.
The current mode is always indicated in the lower-left corner of the Status Screen (FIG 5).
NOTE hile in the mixed MEASURE/CONTROL modes, the MPS49 ill automatically
s itch to CONTROL mode if any problems are detected.
4.2.3 VENT AND “AMBIENT PRESSURE REACHED” MODES
The Vent mode is used to vent the pitot and static ports of the MPS49 to the ambient
pressure condition. The “Ambient Reached” mode is the operation mode that follows a
successful venting procedure.
For more information about the venting procedure, refer to paragraph 7.3.
The Operator can leave the Ambient Reached mode with the MEAS, CNTR or HA T keys.
NOTE The “Ambient Pressure Reached” mode is similar to the MEASURE mode
(paragraph 4.2.2) ith one difference: the Ps, Pt and AoA ports are internally
interconnected, forcing zero Qc and AoA values. The MPS49 may repeat the
venting procedure automatically, if the simulated pressures move a ay from the
ambient pressure, due to thermal effects.
4.2.4 LEAK MODE
The EAK mode initiates the automatic leak test and the internal timer/stopwatch
measurement feature of the MPS49.
While in the EAK mode, the display shows the eak Screen (FIG 7).
Entry to the EAK mode is by pressing the EAK key. If pressed again, the EAK key
restarts the leak measurement.
A leak test can be interrupted with the MEAS, CNTR or HA T keys.
4.2.5 MODE LIMITATIONS DUE TO LOW BATTERY LEVEL
When the battery level is low, the MPS49 disables the CONTRO mode. The only allowed
modes are MEASURE (paragraph 4.2.2) and VENT (paragraph 4.2.3).
When the MPS49 is connected to AC power, the CONTRO mode will be accessible once
again.
4.3 SCREENS
4.3.1 STATUS SCREEN
The Status Screen (FIG 5) is the most used screen during the ADTS operation. It is
displayed when the MPS49 is turned on. Simulated (actual) values are displayed above the
commanded (target) values, each with its measure unit.
The screen displays four physical quantities:
•altitude, airspeed and the corresponding rates, when the ADTS is controlling
aeronautical units;
•static pressure, dynamic/total pressure, the static pressure rate and the
dynamic/total pressure rate, when the ADTS is controlling pressures;
•AoA or Ps2, when enabled;
•Mach number, when enabled.
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