CRM500GA-[] Installation Manual
Contents
1. Equipment tested to Category A Audio Frequency Susceptibility 18 0 Equipment tested to Category B Page 6 Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt Induced Signal 19 0 Equipment tested to C Susceptibility Category C Radio Frequency 20 0 Equipment tested to WWW Susceptibility Category W Radio Frequency 21 0 Equipment tested to M Emission Category M Lightning Induced 22 0 Equipment tested to A3G33 Transient Category A3G33 Susceptibility Lightning Direct 23 0 Equipment identified as X Effects Category X no test performed Icing 24 0 Equipment tested to A Category A Electrostatic 25 0 Equipment tested to A Discharge Category A 3 2 Large Magnetic Field Exposure The CRM500GA should not be exposed to large magnetic fields This could permanently magnetize internal components of the CRM500GA and degrade its magnetic heading accuracy DO NOT stick a magnet to the 500 3 3 Mechanical and Vibration The CRM500GA must be installed in a location that is rigid to alleviate potential vibration errors induced from normal airframe vibration sources The mounting plate must be stiff enough to rigidly follow the aircraft motions without inducing low frequency motions relative to the aircraft 3 4 Magnetic Environment The CRM500GA uses a set of sensitive magnetometers inside its housing to measure Earth s weak magneti2. 5 2 Equipment tested to 70 C D2 Temperature Op High 4 5 3 Equipment tested to 70 C D2 Temperature In Flight Loss of 4 5 4 Equipment requires no D2 Cooling cooling air Altitude 4 6 1 Equipment tested to D2 50 000 ft Decompression 4 6 2 Not Applicable X Overpressure 4 6 3 Not Applicable X Temperature 5 0 Equipment tested to B Doc 7410 0140 03 Rev D Page 5 52 gt CRM500GA Installation Manual Variation Category B Humidity 6 0 Equipment tested to Category B B Operational Shock and Crash Safety 7 0 Equipment tested to Category B B Vibration 8 0 Equipment tested to Category T for fixed wing fuselage and instrument panel and equipment rack Curves E El P Category U for unspecified helicopter Curves F F1 TEEIP UFFI Explosion 9 0 Equipment identified as Category X no test performed Waterproofness 10 0 Equipment tested to Category W Fluids Susceptibility 11 0 Equipment identified as Category X no test performed Sand and Dust 12 0 Equipment identified as Category X no test performed Fungus 13 0 Equipment identified as Category X no test performed Salt Spray 14 0 Equipment tested to Category X no test performed Magnetic Effect 15 0 Equipment tested to Category Z Power Input 16 0 Equipment tested to Category B Voltage Spike 17 0
3. AHRS500GA 226 AHRS500GA 227 5500 220 5500 222 5500 224 AHRS500GA 320 AHRS500GA 321 AHRS500GA 322 AHRS500GA 323 AHRS500GA 324 AHRS500GA 325 AHRS500GA 326 AHRS500GA 327 p n 8350 0260 03 or higher dash number p n 8350 0261 03 or higher dash number p n 8350 0262 03 or higher dash number p n 8360 0262 03 or higher dash number p n 8350 0263 03 or higher dash number p n 8360 0263 04 or higher dash number p n 8350 0264 03 or higher dash number p n 8350 0265 03 or higher dash number p n 8350 0266 03 or higher dash number p n 8350 0267 03 or higher dash number p n 8350 0250 03 or higher dash number p n 8350 0252 03 or higher dash number p n 8360 0252 03 or higher dash number p n 8350 0254 03 or higher dash number p n 8350 0270 01 or higher dash number p n 8350 0271 01 or higher dash number p n 8350 0272 01 or higher dash number p n 8350 0273 01 or higher dash number p n 8350 0274 01 or higher dash number p n 8350 0275 01 or higher dash number p n 8350 0276 01 or higher dash number p n 8350 0277 01 or higher dash number Doc 7410 0140 03 Rev D 52 gt CRM500GA Installation Manual 2 Introduction 2 1 Purpose This manual describes installation of the CRM500GA MEMSIC Remote Magnetometer CRM It is intended for use by personnel certified by the Federal Aviation Administration FAA to install aircraft navigation devices It includes installation alignment and checkout procedures 2 2
4. Fax 408 854 7702 Website www memsic com Email infoca memsic com
5. aligning the CRM500GA sensor axes with the aircraft The CRM500GA should be aligned as closely as possible with the axes you define in your system Errors in Doc 7410 0140 03 Rev D Page 11 52 gt CRM500GA Installation Manual alignment will contribute directly to errors in measured acceleration and rotation relative to your system axes 4 4 5 1 Attitude Leveling The CRM500GA must be level on the yaw and roll planes of rotation when the aircraft is in straight and level flight The pitch axis must be level to the aircraft when aircraft is leveled for weight and balance measurements 4 4 5 2 A Longitudinal Alignment The arrow on CRM500GA must face front of the aircraft It is important that the CRM500GA is properly aligned with the longitudinal axis of the aircraft and NOT with the fuselage skin The alignment of the CRM500GA baseplate and the longitudinal axis must be within 0 5 degree for proper operation 6 WARNING The CRM500GA must be aligned parallel to the centerline of the aircraft Failure to align the CRM500GA parallel to the aircraft centerline will cause errors in heading that cannot be corrected 4 4 6 Survey the Location for Magnetic Interference The CRM500GA may be used to survey the proposed location for magnetic interference by other aircraft systems The procedure uses the 500 located in the proposed location and a laptop computer to survey the magnetic enviro
6. heading generated from the CRM500GA earth magnetic field vector into a heading referenced to true north 2 7 Major System Components In addition to the CRM500GA sensor product and the CRM500GA Installation Manual you should have e 1CD with MEMSIC MagAlign Software AHRS500 and 500 Installation MagAlign software will allow you to align the magnetometers on the CRM500GA on a PC running Microsoft Windows You can also download this software from MEMSIC s web site at http www xbow com e CRM500GA Installation Drawing also included in Appendix section 8 1 of this manual e CRM500GA Installation Wiring Diagram also included in Appendix section 8 2 of this manual 1CRMS500GA Series Operator s Manual This contains valuable operating instructions including limitations 1 Mating connector and backshell The mating connector and backshell are to be used to interconnect with the CRM500GA 1 set of Mounting Hardware Size 6 non magnetic screws nuts and washers are provided for installation of the CRM500GA Doc 7410 0140 03 Rev D Page 3 52 gt CRM500GA Installation Manual 2 8 Unpacking the Equipment Carefully unpack the equipment and verify all the major system components have been received Visually inspect the package contents for any evidence of shipping damage Retain the shipping container and packaging material in case reshipment is necessary 2 9 General Th
7. selected click on SCAN PORT This should automatically detect the model number of the AHRSSOOGA connected display Baud Rate and the status of Remote Magnetometer Connection If no Remote Magnetometer is connected you should see Remote Mag Connected as shown below Doc 7410 0140 03 Rev D Page 15 52 gt CRM500GA Installation Manual comi scan port AHRS500 Model 222 9600 Remote Mag Connected IMPORTANT If the Status reads Remote Mag Not Connected then go back and check all your connections before proceeding further After hitting the CONTINUE button the MagAlign brings up the Window showing Alignment Status DMU Status Instructions and Navigation Display Box as shown below If the MagAlign software was started right after powering up the AHRS500GA the Instructions will read AHRS500 is initializing Wait for further instructions Page 16 Doc 7410 0140 03 Rev D 500 Installation Manual 52 gt The AHRS500 is initializing Wait for further instructions Heading 69 4 4 6 5 Step 5 Magnetic Environment Survey Process The survey process will assess the affect of aircraft subsystems on the CRM500GA earth magnetic field vector sensor performance The heading display in the MagAlign software will be used to observe changes in heading as the aircraft subsystems are actuated 4 4 6 5 1 Point the aircraft to an ordin
8. the turning is stopped Repeat this test for all the four ordinal heading directions Significant errors in the CRM500GA heading alignment indicate improper alignment or improper operation of the CRM500GA If the heading errors are greater than 4 go back to section 6 2 3 and repeat the MagAlign procedure until a satisfactory heading performance is obtained Doc 7410 0140 03 Rev D Page 29 52 gt CRM500GA Installation Manual 7 Support Information 7 1 Customer Service As a MEMSIC customer you have access to product support services which include e Single point return service e Web based support service e Same day troubleshooting assistance e Worldwide MEMSIC representation e Onsite and factory training available e Preventative maintenance and repair programs e Installation assistance available 7 2 Contact Directory United States Phone 1 408 965 3300 8 AM to 5 PM PST Fax 1 408 324 4840 24 hours Email techsupportca 9 memsic com Non U S Refer to website www memsic com 7 3 Return Procedure 7 3 1 Authorization Before returning any equipment please contact MEMSIC to obtain a Returned Material Authorization number RMA Be ready to provide the following information when requesting a RMA e Name e Address e Telephone Fax Email e Equipment Model Number e Equipment Serial Number Installation Date e Failure Date e Fault Description Page 30 Doc 7410 0140 03 Rev
9. D CRM500GA Installation Manual 52 gt 7 3 2 Identification and Protection If the equipment is to be shipped to MEMSIC for service or repair please attach a tag TO THE EQUIPMENT as well as the shipping container s identifying the owner Also indicate the service or repair required the problems encountered and any other information considered valuable to the service facility such as the list of information provided to request the RMA number Place the equipment in the original shipping container s making sure there is adequate packing around all sides of the equipment If the original shipping containers were discarded use heavy boxes with adequate padding and protection 7 3 3 Sealing the Container Seal the shipping container s with heavy tape or metal bands strong enough to handle the weight of the equipment and the container 7 3 44 Marking Please write the words FRAGILE DELICATE INSTRUMENT in several places on the outside of the shipping container s In all correspondence please refer to the equipment by the model number the serial number and the RMA number 7 3 5 Return Shipping Address Use the following address for all returned products MEMSIC Inc 1759 McCarthy Blvd Milpitas CA 95035 Attn RMA Number XXXX Doc 7410 0140 03 Rev D Page 31 CRM500GA Installation Manual 52 gt 8 Appendices Installation Drawing 8 1 L HEEL 9005 a
10. MEMSIC Powerful Sensing Solutions for a Better Life CRM500GA Installation Manual Document 7410 0140 03 Revision D November 2009 MEMSIC Inc 1759 McCarthy Blvd Milpitas CA 95035 Tel 408 964 9700 Fax 408 854 7702 email infoca memsic com website www memsic com Revision History Revision Date Author Comments 01 A 12 17 04 Initial Release 01 B 12 22 04 DIP Corrected wiring diagram pin out 02 A 2 3 05 GB Updated address wiring diagram and MagAlign 03 A 8 05 GB DIP Updated MagAlign 03 B 2 07 MPS Added Usage Clause 03 C 1 09 MPS Updated Parts List Install drawing updated to reflect additional mounting holes 03 D 11 09 PAL Added AHRS500GA 32x to list of model s compatible w CRM500 per ECO 1312 6 WARNING This product has been developed by MEMSIC exclusively for commercial applications It has not been tested for and MEMSIC makes no representation or warranty as to conformance with any military specifications or that the product is appropriate for any military application or end use Additionally any use of this product for nuclear chemical biological weapons or weapons research or for any use in missiles rockets and or UAV s of 300km or greater range or any other activity prohibited by the Export Administration Regulations is expressly prohibited without the written consent of MEMSIC and without obtaining appropriate US export licen
11. NT4 2000 XP Freely available RS 232 compatible Serial Port National Instruments Driver LabVIEW RunTime Engine 6 1 which comes with CRM500 Installation MagAlign software To install AHRS500 and CRM500 Installation MagAlign Software in your computer 1 Insert the CD AHRS500 and 500 Installation MagAlign in the CD ROM drive 2 Find the Installer folder Double click on the setup exe file 3 Follow the setup wizard instructions You will install AHRS500 and CRM500 Installation MagAlign and a LabVIEW Runtime Engine You will need both these applications 4 4 6 3 Step 3 Alignment Cable Connections The AHRS500GA is shipped with an installation and alignment cable to connect the unit to a PC communications port 1 Connect the 15 pin female end of the alignment cable to the port on the AHRSSO0GA 2 Connect the 15 pin male end of the alignment cable to the aircraft cable connector which supplies power to the 5500 and provides the CRM500GA RS422 interface signals 3 Start the computer before connecting the 9 pin end of the cable to the serial port of the computer Later versions of Windows especially Windows 2000 and Windows XP interpret a connection to the serial port at boot time as a serial mouse The operating system will load the mouse driver and interpret the data from the Doc 7410 0140 03 Rev D Page 13 52 gt CRM500GA Installation Manual 4 4 6 4 AHRS500GA as mouse command
12. Reference Documents Applicable Aircraft Maintenance Manuals FAA Advisory Circular AC 43 13 1B 23 CRM500GA System Description The CRM500GA remote magnetometer is a three Degree of Freedom DOF strap down earth magnetic field measurement reference system The CRM500GA in conjunction with an AHRS500GA 220 or higher is the solid state equivalent of a vertical gyro combined with directional gyro The CRM500GA uses three solid state magnetometers three solid state accelerometers and high speed digital microprocessor based electronics to provide the earth magnetic field 3 dimensional vector which can then be used to calculate a heading reference The three axis magnetometer is mounted on an internal circuit board and attached with the other electronics The three axis accelerometer is used for attitude leveling of the CRM500GA mounting location The CRM500GA remote magnetometer provides an accurate measure of the earth magnetic field which is used as a heading reference in avionic dynamic environments including altitude temperature shock and vibration The CRM500GA remote magnetometer is designed to be located in the portions of the aircraft where pressure and temperature are not controlled 2 44 500 Coordinate Systems The CRM500GA uses the coordinate system as defined in the Installation Drawing Appendix section 8 1 The 500 needs to be installed in such a way that the arrow point
13. RunTime Engine 6 1 which comes with CRM500 Installation MagAlign software After finishing the steps aforementioned in Section 4 4 6 the program is ready to perform the alignment 6 2 2 Alignment Process Overview There are several steps to the alignment process that are repeated until the AHRS500GA has collected enough data to compute a hard and soft iron compensation that meets the performance requirements The alignment steps are 1 2 3 4 10 11 12 13 Apply power to the 5500 and CRM500GA Wait 90 seconds for initialization to complete Turn the MagAlign switch ON Maintain the aircraft position for 60 seconds for the Leveling Alignment to complete Turn the MagAlign switch OFF Turn the MagAlign switch ON and wait for 60 seconds for AHRSS500GA to re initialize Slowly rotate the aircraft through a full 360 degree turn until the software requests to stop the turn Stop the turn Wait 60 seconds for the AHRS500GA to re initialize Repeat steps 7 8 and 9 turning the aircraft through 360 degree circles with a wait between each turn until the MagAlign Message Box indicates the alignment meets the performance requirements Turn OFF the MagAlign switch to load the mag alignment data in the 5500 Align the aircraft along the Magnetic North and turn the MagAlign switch ON Maintain the position of the aircraft for 60 seconds for the heading offset calibration to com
14. Switch to OFF You should also notice Check mark on Leveling Alignment in the Alignment Status box indicating the success Page 24 Doc 7410 0140 03 Rev D 5 Installation Manual 52 gt Heading 69 6 2 3 7 Step 2 Hard and Soft Iron Alignment This alignment routine requires turning the aircraft through several rotations to compensate for hard soft iron effects To accomplish this e Upon completion of Step 1 you should see the MagAlign screen as shown above with instructions box indicating Prepare to turn in a circle after the AHRS500 initializes Flip the toggle switch to the ON position when ready the MagAlign Switch to ON e The instructions box will change to Stop turning AHRS500 is initializing Wait for further instructions You would also see the Hard Soft Iron Alignment highlighted in the Alignment Status box as shown below Doc 7410 0140 03 Rev D Page 25 52 gt CRM500GA Installation Manual Stop turning AHRS500 is initializing Wait for Hard Soft Iron Alignment E instructions Heading 69 s MIU e Wait for 60 seconds for the AHRS500GA to initialize The Progress bar will indicate the percentage of initialization that has been completed e Upon completion of the initialization the message box will change to Hard Soft iron alignment needs refinement Turn slowly in a circle until instructed to stop e Turn
15. The message will change to Alignment is successful Stop the program Unit is ready for You should also notice Check marks on Heading Offset Alignment and MagAlign Complete in the Alignment Status box indicating the success n is successful Stop the program Unit is r use e To stop the program exit the application Page 28 Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt The AHRS500GA and 5 are now ready for use Remove the Test Cable and restore all the connections to the aircraft connector 6 3 Testing the CRM500GA Alignment 6 3 1 Heading Alignment The heading alignment can be tested by comparing the heading output of the 500 or AHRS500GA on the primary flight display against a known reference such as a compass compass rose or runway with known heading Align the aircraft along an ordinal heading of North South East or West Make sure the CRM500GA or AHRS500GA has completed the 90 second initialization period Observe the heading reading on the MagAlign software Make sure heading reading agrees within 4 of the reference Rotate the aircraft along an ordinal heading of North South East or West that is 90 degrees from the previous position Observe the heading reading on the MagAlign software and make sure that this agrees within 4 from the reference A good alignment will not display more than a 4 heading change once
16. al heading If possible align the aircraft along an ordinal heading of North South East or West Precision alignment is not necessary Make sure the 5500 has completed the 90 second initialization period Observe the heading reading on the MagAlign software Cycle mechanical subsystems and electrical subsystems that might interfere with the 500 heading while checking for heading errors Move all control cables to their full extents and operate all equipment to ensure that there are no adverse affects to the CRM500GA heading An adverse affect would be a heading change of more than 4 at any time A good location will not display more than a 4 heading change when all systems are operated Systems can include operation of flaps landing gears and engines Doc 7410 0140 03 Rev D Page 17 52 gt CRM500GA Installation Manual 4 4 6 5 2 Rotate the Aircraft through approximately 90 degrees Rotate the aircraft along an ordinal heading of North South East or West that is 90 degrees from the previous position Precision alignment is not necessary Make sure theAHRS500GA has completed the 60 second initialization period Observe the heading reading on the MagAlign software Cycle mechanical subsystems and electrical subsystems that might interfere with the CRM500GA heading while checking for heading errors A good location will not display more than a 4 heading change when all systems are operated Sy
17. c field which is then used by the AHRS500GA 220 or greater to determine heading As a result small amounts of moving magnetic material near the 500 can have large effects on the heading calculation 500 should be isolated from magnetic material as much as possible Magnetic material will distort the magnetic field near the 500 which can affect its accuracy as an earth magnetic field sensor Doc 7410 0140 03 Rev D Page 7 52 gt CRM500GA Installation Manual Materials to avoid include anything that will stick to a magnet iron carbon steel some stainless steels nickel and cobalt Use a magnet to test materials that will be near the CRM500GA Code within the AHRSSOOGA 220 or higher can correct for the effect of these magnetic fields by using hard and soft iron alignment routine as long as the material 18 stationary Materials that will not affect the magnetic heading performance include aluminum brass plastic titanium wood and some stainless steels Again if in doubt try to stick a magnet on the material If the magnet doesn t stick you are working with a material that will not affect the heading The alignment procedure will compensate for stationary ferrous objects Moving ferrous objects located within 24 inches of the CRM500GA cannot be fully compensated for by the magnetometer alignment For this reason the CRM500GA must not be located within 24 inches o
18. can affect its accuracy as an earth magnetic field vector sensor As a result small amounts of moving magnetic material near the CRM500GA can have large effects on the calculated heading measurement The alignment procedure will compensate for stationary ferrous objects Moving ferrous objects located within 24 inches of the CRM500GA cannot be fully compensated for by the magnetometer alignment For this reason the CRM500GA must not be located within 24 inches of any large moving ferrous metal objects such as landing gear components electric motors control linkages etc Ferrous metal objects that may change position during flight operations such as landing gear flap actuators and control linkages must also not be within 24 inches of the CRM500GA Materials to avoid include anything that will stick to a magnet iron carbon steel some stainless steels nickel and cobalt Materials that will not affect the magnetic heading performance include aluminum brass plastic titanium wood and some stainless steels Use a magnet to test materials that will be near the CRM500GA If the magnet doesn t stick you are working with a material that will not affect the heading DO NOT stick a magnet to the CRM500GA Page 10 Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt 6 WARNING For the CRM500GA to function properly in a tubular steel fuselage aircraft you must completely degauss the airframe prio
19. d measured by the CRM500GA The extra magnetic field can create errors in the heading measurement if they are not compensated These extra magnetic fields are called hard iron magnetic fields In addition magnetic material can change the direction of the magnetic field as a function of the input magnetic field This dependence of the local magnetic field on input direction is called the soft iron effect Code within the 5500 220 or higher measures any extra constant magnetic field that is associated with the CRMS00GA or your aircraft and corrects for it during the alignment procedure The AHRSSOOGA 220 or higher can also make a correction for some soft iron effects The process of measuring these non ideal effects and correcting for them is called hard iron and soft iron alignment Alignment will help correct for magnetic fields that are fixed with respect to the 500 It cannot compensate for time varying fields or fields created by parts that move with respect to the 500 The CRM500GA accounts for the extra magnetic field by making series of measurements The CRM500GA uses these measurements to model the hard iron and soft iron environment in your aircraft 6 2 CRM500GA Magnetometer Alignment Procedure The magnetometer alignment procedure is performed in place on the aircraft using the alignment maintenance cable a portable PC running Windows the AHRS500 and CRM500 Installatio
20. e installation technicians should thoroughly familiarize themselves with the installation drawing and installation wiring diagrams prior to installation of the CRM500GA gt IMPORTANT The 500 should not be exposed to large magnetic fields This could permanently magnetize internal components of the CRM500GA and degrade its magnetic heading accuracy Page 4 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt 3 Limitations 3 1 Environmental Conditions The 500 is limited to operation in the DO 160D environmental conditions marked on the unit label and are also listed in Table 2 The D2 temperature and altitude category is limited to an operating low temperature of 55 C an operating high temperature limit of 70 and a short term operating high temperature limit of 70 TYPE MODEL PART NO CRM500GA TSO NUMBER TSO C6d MANUFACTURER MEMSIC Inc ADDRESS 1759 McCarthy Blvd Milpitas CA 95035 REVISION AND CHANGE NUMBER OF DO 160 D Table 1 DO 160D environmental conditions CONDITIONS SECTION DESCRIPTION OF IDENT TESTS CONDUCTED Temperature amp 4 0 Equipment tested to D2 D2 Altitude Ground Survival 4 5 1 Equipment tested to 55 D2 Low Temperature Op Low 4 5 1 Equipment tested to 55 D2 Temperature Ground Survival 4 5 2 Equipment tested to 85 C D2 High Temperature Short time Op High 4
21. etic North for heading alignment of the CRM500GA This can be done easily by using a known reference marker such as a compass compass rose or runway with known heading To accomplish this e Upon completion of Step 2 you should see the MagAlign screen as shown below with instructions box indicating Align with magnetic north for this step of the alignment Flip the toggle switch to the ON position when ready e Align the aircraft along Magnetic North and turn the MagAlign Switch to ON Doc 7410 0140 03 Rev D Page 27 RM A I llation M 52 gt CRM500GA Installation Manua The instructions box will change to Performing heading offset alignment Maintain your position and wait for further instructions e Maintain the aircraft in this position motionless for 60 seconds Progress bar will indicate the percentage of initialization that has been completed e Upon completion the instructions box will change to Heading offset alignment is successful and 5500 is initializing Wait for further instructions Maintain the aircraft in this position for 60 more seconds for the AHRS500GA to initialize Progress bar will indicate the percentage of initialization that has been completed e Upon completion of initialization instructions box will change to AHRS500 has finished initializing Flip the toggle switch to the OFF position to continue Turn the MagAlign Switch to OFF e
22. f any large moving ferrous metal objects such as landing gear components electric motors control linkages etc Ferrous metal objects that may change position during flight operations such as landing gear flap actuators and control linkages must also not be within 24 inches of the CRM500GA The CRM500GA should not be located close to high current DC power cables or 400 cycle AC power cables and their associated magnetic fields 3 5 CRM500GA Alignment with the aircraft The CRM500GA must be level on the yaw and roll planes of rotation when the aircraft is in straight and level flight The pitch axis must be level to the aircraft when aircraft is leveled for weight and balance measurements The CRM500GA will measure gravity and the earth magnetic field vector along the axes of its sensors The CRMS00GA sensors are aligned with the baseplate The baseplate references are noted in the installation drawing and are used as reference surfaces for aligning the CRM500GA sensor axes with the aircraft The CRM500GA should be aligned as closely as possible with the axes you define in your system Errors in alignment will contribute directly to errors in measured earth magnetic field vector relative to your system axes It is important that the CRM500GA be aligned carefully with the longitudinal axis of the aircraft and NOT with the outer skin of the fuselage Page 8 Doc 7410 0140 03 Rev D CRM500GA Installation Ma
23. ipment and software is needed to perform the hard and soft iron alignment e 1CD with AHRS500 and CRM500 Installation MagAlign Software AHRS500GA and CRM500GA Installation MagAlign graphically displays the 500 output and provides step by step alignment instructions on a PC running Microsoft Windows You can also download this software from MEMSIC s web site at http www memsic com support documentation inertial systems category 5 software downloads html 1 Digital Signal Alignment Maintenance Cable part number 8060 0140 01 included with AHRS500GA The AHRS500 then connects to a PC running Microsoft Windows for installation and maintenance functions Power is provided by the aircraft wiring harness but the serial output data stream from the CRM500GA and AHRS500 is directed to the maintenance PC 1 Portable computer The computer should be a portable laptop style if possible with a serial port and Windows 98 NT4 2000 XP type operating system The following are minimum capabilities that your computer should have to run the AHRS500 and CRM500 Installation MagAlign successfully Doc 7410 0140 03 Rev D Page 21 52 gt CRM500GA Installation Manual CPU Pentium class RAM Memory 32MB minimum 64MB recommended Hard Drive Free Memory 15MB Operating System Windows 95 98 NT4 2000 XP Freely available RS 232 compatible Serial Port National Instruments Driver LabVIEW
24. irframe vibration engine control surfaces etc Prepare a mounting plate in accordance with the CRM500GA Installation drawing and in accordance with good practice and procedures for mounting to the aircraft structure Secure the CRM500GA unit to the airframe being careful to install all of the shims that were required to level on the yaw and roll planes of rotation when the aircraft is in a straight and level flight attitude Use the non ferrous hardware provided with the 500 where possible to reduce magnetic interference with the CRMS500GA Doc 7410 0140 03 Rev D Page 19 52 gt CRM500GA Installation Manual 6 CRM500GA Post Installation Procedures 6 1 Alignment Introduction The CRM500GA will need to be aligned for leveling hard and soft iron compensation and heading offset before use with the aircraft Mounting differences between the AHRS500GA 220 or higher and CRM500GA can contribute to leveling and heading offset error which must be accounted for in the AHRS500GA 220 or higher software The CRMS500GA series provides an earth magnetic field vector measurement from internal magnetic sensors which can then be used to compute heading Ideally the magnetic sensors would be measuring only earth s magnetic field as a means to provide data to compute the heading angle In the real world however residual magnetism in the CRM500GA itself and in your system will add to the magnetic fiel
25. llation Pre Modification Procedures 9 41 Pre Mod Avionics 2 00040 9 42 Mating Connector Crimp Tools eee 9 4 3 Pre Mod Load Review essere enne 9 44 Installation Location Selection esses 9 4 4 1 Introduction 2 ca re ieie 9 4 4 2 Location and proximity to IDU Integrated Display Unit 9 4 4 3 Mounting Structure seen 10 4 4 4 Magnetic Environment Considerations 10 4 4 5 500 Alignment with the aircraft 11 44 6 Survey the Location for Magnetic 12 5 CRM500G Installation 19 5 1 Task 1 Secure the CRM500GA Wiring 19 5 2 Task 2 Degauss Control Cables and Hardware 19 53 Task 3 Permanently Mount the CRM500GA 19 Doc 7410 0140 03 Rev D Pagei 52 gt CRM500GA Installation Manual 6 500 Post Installation 20 6 1 Alignment Introduction sese 20 6 2 CRM500GA Magnetometer Alignment Procedure 20 6 2 1 Equipment Needed eterne 21 6 2 2 Alignment Process Overview esee 22 6 2 3 Detailed Alignment Procedu
26. n MagAlign software provided by MEMSIC Inc A switch on the cable provides a signal input to the AHRS500GA commanding it to enter each mode of the alignment process This will be apparent with the MagAlign PC software During the first phase of alignment the leveling alignment the aircraft remains still During the second phase of the alignment process the hardiron softiron Page 20 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt alignment the aircraft will need to be rotated through complete circle s while monitoring the AHRS500 and CRM500 Installation MagAlign software for progress The alignment software will determine when an adequate set of alignment data has been acquired and notify the user through the Message Box The entire procedure may take several rotations of the aircraft to collect sufficient data During the third and final alignment phase the heading offset alignment the aircraft must be pointed as closely as possible to magnetic north It is required that you perform the alignment process with the CRM500GA installed in your system If you do the alignment process with the 500 by itself you will only correct for the magnetism internal to the CRM500GA If you then install the CRM500GA in an aircraft and the magnetic environment is different you will still see errors arising from the magnetism of the aircraft environment 6 2 1 Equipment Needed The following equ
27. nel 021 guss OISWAW Y H EIRIS 8 sS V HOMOUHL A199 3 334 10 013 5 TGHS HOLD NNOS 3H1 OL OFHOW LLY 39 2568 01995 NINIK 38 18098 STAYS 304443190 HIS IHL 87 4 0 SLAB TIVHS HLONGTTIVE Did 6 00 210252214 71004 ONYH 5500 LNT TUAITOSS YO n 5 31221808980 NdSCY3S2 5658EQ HOid3NNOO fF GNV JRVB JO SJOV uns TUNISIE 3 ND TIMOIY OD vL SENO HSNEG It SIHIN NOISNARIO STINGS Iz ELA ISMV Had OUO 38d Ha Lhe L O31 V8 SSWAHHIO SSTINIT SILON 1 QA E rci Halu bol 1 IN OG 5 m n z T Doc 7410 0140 03 Rev D Page 32 52 gt CRM500GA Installation Manual Installation Wiring Diagram 8 2 JVW Nid 9 NNOO NSSEvdrz 66680 1 voooswso NYNLIJY H3MOd vo00SWN2 OL YIMOd Lava AN3TIVAInO3 HO p Nid Lf 0055 OL NYNLIY 22958 AN3TTVAIQO3 YO St Nid bf OOSSYHYW OL XL 22954 LNA TWAINDS YO 1 Nid If OOSSYHY OL 1 22954 d Q3GN3WINOO3S SNIQT3IHS _ a TI3HS32V8 OL Q 3lHS SIL m d Page 33 Doc 7410 0140 03 Rev D 5 gt 1759 McCarthy Blvd Milpitas CA 95035 Phone 408 964 9700
28. nment Temporarily mount locate the CRM500GA in the proposed location Connect the CRM500GA using the alignment maintenance cable Use AHRS500 and 500 MagAlign software to assess heading changes while operating the aircraft subsystems with the aircraft facing one of the ordinal directions N S E or W Repeat with the aircraft rotated 90 degrees to another ordinal direction Use the MagAlign software to determine the best location of 500 by selecting the Navigation Window and viewing the heading deviations as systems around the CRM500GA are activated deactivated and operated throughout their functions good location will not display more than a 4 heading change when all systems are operated Systems should include operation of flaps landing gears and engines Page 12 Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt 4 4 6 1 Step 1 Temporarily mount the 500 in the proposed location 4 4 6 2 Step 2 Install the AHRS500 and CRM500 MagAlign Software on a portable computer The computer should be a portable laptop style if possible with a serial port and Windows 98 NT4 2000 XP type operating system The following are minimum capabilities that your computer should have to run the AHRS500 and 500 Installation MagAlign successfully CPU Pentium class RAM Memory 32MB minimum 64MB recommended Hard Drive Free Memory 15MB Operating System Windows 98
29. nual 52 gt 4 CRM500GA Installation Pre Modification Procedures This section describes the procedures to be used before final installation of the CRM500GA These procedures describe the installation location selection for the CRM500GA Always use good avionics installation practices per FAA Advisory Circulars AC43 13 1B 4 13 2A and 20 138 or later FAA approved revisions of these documents 41 Pre Mod Avionics Test Perform a pre modification avionics systems test to verify that the systems that will be connected to the CRM500GA are working properly in accordance with their appropriate maintenance manuals 4 2 Mating Connector Crimp Tools A crimp tool recommended by the mating tool manufacturer should be used to ensure consistent and reliable crimp contact connections for the mating connector 4 3 Pre Mod Load Review Complete an electrical load analysis on the aircraft prior to installing the 500 to ensure the aircraft has the electrical load capacity to carry the new load 4 4 Installation Location Selection 44 1 Introduction Selecting the location for the 5 is a two step process e The first step is to find a proposed location based on the criteria in this section e second step is using the 5 and the MagAlign software to survey the proposed location for magnetic interference from other aircraft systems 4 4 2 Location and proximity t
30. o IDU Integrated Display Unit The 500 can be mounted inside or outside of the pressure vessel Most aircraft can accommodate the CRM500GA in the wings or near to any traditional compass mechanism installed on the aircraft NOT THE INTERNAL COCKPIT COMPASS Whether you want to place the Doc 7410 0140 03 Rev D Page 9 52 gt CRM500GA Installation Manual CRMS500GA there or elsewhere the location for the CRM500GA must comply with the environmental specifications called out in section 3 4 43 Mounting Structure The CRM500GA must be installed in a location that is rigid to alleviate potential vibration errors induced from normal airframe vibration sources The mounting plate must be stiff enough to rigidly follow the aircraft motions without inducing low frequency motions relative to the aircraft If you have any doubt concerning the 5 location suitability please contact your MEMSIC technical representative by phone at 408 964 9700 or visit our website at http www memsic com 4 44 Magnetic Environment Considerations 4 4 4 1 Materials The CRM500GA uses a set of sensitive magnetometers inside its housing to measure Earth s weak magnetic field which is then used by the AHRS500GA 220 or higher to calculate heading The CRM500GA should be isolated from magnetic material as much as possible Magnetic material will distort the magnetic field near the CRM500GA which
31. plete Page 22 Doc 7410 0140 03 Rev D 5 Installation Manual 52 gt 14 Upon completion wait for another 60 seconds for the AHRS500GA to re initialize 15 Turn OFF the MagAlign switch 6 2 3 Detailed Alignment Procedure 6 2 3 1 Step 1 Leveling Alignment The first step of the alignment process is Leveling Alignment to align the CRM500GA with AHRSS500GA To accomplish this e First follow the instructions in Section 4 4 6 4 e Once you have the MagAlign screen up you should see instructions Alignment is needed Make sure that you are level then flip the toggle switch to ON position to begin Alignment is needed Make sure that you are level n flip the toggle switch to the ON Heading 70 e Turn the MagAlign Switch to ON e You should see the instructions change to Performing Leveling Alignment Maintain your position and wait for further instructions You would also see the Leveling Alignment highlighted in the Alignment Status box as shown below Doc 7410 0140 03 Rev D Page 23 52 gt CRM500GA Installation Manual Performing leveling alignment Maintain your position and wait for further instructions Heading 69 e Maintain the aircraft in this position motionless for 60 seconds e Upon completion the instructions should change to Leveling Alignment successful Flip the toggle switch to OFF position e Turn the MagAlign
32. r to CRM500GA installation 6 WARNING It may be necessary to degauss flight control cables near the CRM500GA location to prevent magnetic interference 4 4 42 Distance from moving ferrous iron and steel metallic objects The CRM500GA must not be located within 24 inches of any large moving ferrous metal objects such as landing gear components motors steel control cables or linkage Avoid any metallic objects that may change position between ground operations and flight operations such as landing gear flap actuators and control linkages 4 4 4 3 Distance from electrical wires The 500 should not be located close to high current DC power cables or 400 cycle AC power cables and their associated magnetic fields Wires carrying high currents alternating currents or intermittent currents can cause magnetic variations that will affect the CRM500GA Keep wires with these characteristics at least 24 inches away from the CRMS500GA These wires can include Battery wires Strobe wires Autopilot control wires Position light wires De ice boot wires Air conditioning power wires HF control wires 4 4 5 CRM500G A Alignment with the aircraft The CRM500GA will measure gravity and the earth magnetic field vector along the axes of its sensors The CRM500GA sensors are aligned with the baseplate The baseplate references are noted in the installation drawing and are used as reference surfaces for
33. re esses 23 6 3 Testing the CRM500GA Alignment eene 29 6 3 1 Heading Alignment sssini eiie od eet 29 7 Support InfOrm tlon 30 7 1 Customer SeryIce e getestet i eire podere artes 30 7 2 Contact Directory eite i eer ege 30 7 3 Return Procedure eet ere ette 30 7 3 1 AuthOotization len eerte 30 7 3 2 Identification and Protection esee 31 7 3 3 Sealing the Container esee 31 7 34 Markig PH 31 7 3 5 Return Shipping Address see 31 8 Appendices eter lbs 32 8 1 Installation 32 82 Installation Wiring Diagram 33 Page ii Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt 1 About this Manual 1 1 Notation The designation 500 denotes that the family of CRM500GA products and the topic is common to all models identified by dash number Instances where the dash number 1s called out 1 CRM500GA 200 indicate a topic that pertains only to the particular model of the CRM500GA called out by the dash number The CRM500GA can be used in conjunction with the following AHRS500 model number and part numbers AHRS500GA 220 AHRS500GA 221 5500 222 5500 223 5500 224 AHRS500GA 225
34. s if the AHRS500GA is connected before the computer is started and booted Connect the 9 pin end of the cable to the serial port of your computer The alignment switch on the cable should be set to OFF Powering up the unit with the switch in the ON position will erase the magnetometer alignment Apply power and let the AHRS500GA initialize for 90 seconds With the AHRS500GA connected to your PC serial port and powered open the AHRS500 and CRM500 Installation MagAlign software Step 4 MagAlign Initialization Upon opening the AHRS500 and CRM500 MagAlign software the following disclaimer screen appears Please read the disclaimer and click on I acknowledge to Continue further Page 14 Doc 7410 0140 03 Rev D 5 Installation Manual 52 gt Once you acknowledge the disclaimer and click on CONTINUE the Connection Instructions dialog window pops up reminding users of basic steps before using the software The screen is shown as follows After 3 seconds an Instructions dialog window pops up reminding users of basic steps before using the software The screen is shown as follows The dialogue leads the user to an important step of connecting AHRS500GA to the computer s serial port Double check the serial port so that it matches with what you select on the screen Incorrect serial port setting will result in non response from the program With proper COM port
35. s to the front of the aircraft The axes form an orthogonal right handed coordinate system Acceleration is negative when it is oriented towards the positive side of the coordinate axis For example with the 500 sitting on a level table it will measure zero g along the x and y axes and 1 g along the z axis Gravitational acceleration is measured upward and thus with the positive axis for the CRM500GA facing downward resulting in a positive 1g for Page 2 Doc 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt the 500 z axis The magnetic sensors are aligned with the same axes definitions and sign as the linear accelerometers 2 Data Interface The CRM500GA serial interface is standard RS 422 38400 baud 8 data bits 1 start bit 1 stop bit no parity and no flow control and will output at 50 Hz This needs to be directly interfaced to the AHRS500GA 220 or higher 2 6 Magnetic Heading Magnetic north is the direction toward the magnetic north pole true north is the direction towards the true North Pole The CRM500GA earth magnetic vector can be used to calculate a heading angle that is referenced to magnetic north The direction of true north will vary from magnetic north depending on your position on the earth The difference between true and magnetic north is called declination or magnetic variance You will need to know your declination to translate the calculated magnetic
36. se s when required by US law Diversion contrary to U S law is prohibited 2004 2009 MEMSIC Inc rights reserved Information in this document is subject to change without notice MEMSIC and SoftSensor are registered trademarks AHRS500GA and CRM500GA are trademarks of MEMSIC Inc Other product and trade names are trademarks or registered trademarks of their respective holders CRM500GA Installation Manual MEMSIC Table of Contents 1 About this 1 1 1 INO atTOD 1 2 ces es OM RR LH 2 2 1 C 2 2 2 Reference erit 2 2 3 The 500 System Description 2 2 4 500 Coordinate 2 2 5 Data Interface oot eres 3 2 6 Magnetic Heading ceteri 3 2 7 Major System Components sese 3 2 8 Unpacking the Equipment seen 4 2 9 Sup 4 MTA ONS se eee verdes 5 3 1 Environmental Conditions 410000 5 32 Large Magnetic Field 44441 121 7 3 3 Mechanical and 1 7 3 4 Magnetic Environment rennen 7 3 5 500 Alignment with the 8 4 CRM500GA Insta
37. stems can include operation of flaps landing gears and engines Repeat this for all the 4 ordinal heading directions North South East and West and ensure that satisfactory heading is obtained If the heading performance is not satisfactory find a new location and repeat the tests Page 18 7410 0140 03 Rev D CRM500GA Installation Manual 52 gt 5 CRM500GA Installation Procedure 51 Task 1 Secure the CRM500GA Wiring The CRM500GA must be mounted clear of any wiring bundles strobe lines antennas or anything that may cause magnetic or electrical interference Secure the wiring allowing access and movement of the 500 unit Prepare install route and terminate the connecting aircraft cable for the CRM500GA in accordance with the CRM500GA Installation Wiring Diagram included in Appendix section 8 2 of this manual Ensure the system wiring is routed separately from 400 cycle AC and high current DC power cables 5 2 Task 2 Degauss Control Cables and Hardware Degauss all control cables attachment hardware and other equipment located within a 24 inch area of the CRM500GA unit using a hand held degausser Most audio and video degaussing units can be used 5 3 Task 3 Permanently Mount the CRM500GA Find or manufacture a rigid mounting location of at least 0 040 inches min thick aluminum with sufficient stiffeners to alleviate potential vibration errors induced from normal a
38. the aircraft in a circle slowly Although it does not matter if the aircraft turns clockwise or counter clockwise direction in any of the turns it is preferable to turn in only one direction The turn will continue through 360 degrees e Upon completion of the turn the instructions box will change to Stop turning AHRS500 is initializing Wait for further instructions e Wait for 60 seconds for the AHRSS00GA to initialize The Progress bar will indicate the percentage of initialization that has been completed e In general a successful magnetometer alignment may require several turns in a circle before the program declares the hard soft iron alignment is successful The message in the MagAlign Message Box will tell the user if additional turns in a circle are required The same process of turning through 360 degrees full Page 26 Doc 7410 0140 03 Rev D RM i CRM500GA Installation Manual 52 gt circle and wait of 60 seconds for initialization will be required for each turn e When you have a successful hard soft iron alignment the instructions box should read Hard soft iron alignment is successful Flip the toggle the switch to the OFF position e Turn the MagAlign Switch to OFF You should now notice Check mark on Hard Soft Iron Alignment in the Alignment Status box indicating the success 6 2 3 3 Step 3 Heading Offset Alignment This step requires the aircraft to be oriented along the magn
Download Pdf Manuals
Related Search