Narco Avionics AR850 Installation And Operation Manual
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Narco Avionics AR850 Installation And Operation Manual

Altitude reporter
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AR850 ALTITUDE REPORTER
INSTALLATION/OPERATION
®NARCO
270 COMMERCE DRIVE
FORT WASHINGTON, PENNSYLVANIA, 19034
U.S.A.
©
PRINTED IN U.S.A.
(L/C)30,700ft
30,700 FEET
MANUAL PART NO. 03753-0623
AVIONICS
COPYRIGHT, NARCO AVIONICS INC., 1990
MANUAL
INC.
JULY, 2003

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Summary of Contents for Narco Avionics AR850

  • Page 1 AR850 ALTITUDE REPORTER (L/C)30,700ft INSTALLATION/OPERATION MANUAL 30,700 FEET MANUAL PART NO. 03753-0623 ®NARCO AVIONICS INC. 270 COMMERCE DRIVE FORT WASHINGTON, PENNSYLVANIA, 19034 U.S.A. © COPYRIGHT, NARCO AVIONICS INC., 1990 PRINTED IN U.S.A. JULY, 2003...
  • Page 2 NOTICE While every effort has been made by Narco Avionics Inc. to ensure accuracy in the preparation of this Installation Manual, Narco assumes no responsibility for errors or omissions. NARCO AVIONICS INC. CAN BE REACHED BY CALLING: PHONE: 215-643-2900 FAX:...

  • Page 3: Table Of Contents

    AR850 to Transponder Compatibility ....2-9 2.4.2 AR850 ENABLE Requirements ......2-9 2.4.3 Primary Power Requirement ......2-10 2.4.4 AR850 Altitude Code Line Characteristics ..2-10 2.4.5 Interconnect Cable Fabrication ....2-11 2.4.6 Correspondence Test ....... 2-12 2.4.6.1 Test Equipment Requirements ....... 2-12 2.4.6.2...
  • Page 4 THIS PAGE LEFT INTENTIONALLY BLANK...

  • Page 5: Manual Organization

    Mode C interrogation. The AR850 L/C (30,700 ft.) differs from the 25,000 and 30,700 ft. versions in mechanical packaging and altitude limit only. The pin out (because of the smaller connector) is different from the original model.

  • Page 6: Design Features

    -1,000 to 30,700 feet, as shipped from the factory. MECHANICAL SIZE : See UNIT DIMENSIONS on page 2-4. WEIGHT : AR850 Unit 0.7 lbs. ( 0.318 kg.) AR850 Tray 0.090 lbs. (0.041 kg.) 7/03...
  • Page 7 BIT ON OUTPUT STATE : 0.75 Vdc at 50 ma. Sinking current 1.1 Vdc at 100 ma. sinking current DIGITIZER ENABLE SIGNAL INPUT The AR850 will accept continuous type digitizer enable signal information. DIGITIZER ENABLED: J101-6 : When pin 6 is grounded the digitizer is enabled.

  • Page 8: Licensing Requirements

    NARCO AVIONICS AR850 ORDERING INFORMATION FOR UNITS AND ACCESSORIES The following list identifies the AR850 system and the order number to use to obtain the complete system. The accessory items of the system may be ordered by using the part numbers listed opposite the item.

  • Page 9: Tso Explanation

    Induced Signal Susceptibility (Section 19) │ │ Radio Frequency Susceptibility (Section 20) │ Emission of Radio Frequency Energy (Section 21) * AR850 also tested for shock operation (Sections 7, 7.2, 7.3). Temperature and Altitude - Category B1 Temperature, Operating: -20 ° C (-4 ° F) Low Operating Temperature +55 °...
  • Page 10 NARCO AVIONICS AR850 Temperature Variation - Category B Low Operation (-20 ° C) to Temperature may vary between High Operation (+55 ° C). high and low limits at a rate of 5 degrees C minimum per minute. Humidity - Category A...

  • Page 11: Environmental Qualification Form

    TSO categories to which the AR850 was designed and tested as outlined in RTCA Document DO-160B dated July 1984. The installing agency must ensure that the owner of the AR850 is given this form which he should place in his avionics equipment file.
  • Page 12 NARCO AVIONICS AR850 THIS PAGE INTENTIONALLY LEFT BLANK 7/03...

  • Page 13: Preliminary Procedures

    14/28 Vdc, 2 amp power supply b. Ohmmeter c. Pitot Static System Test Set Prepare an AR850 mating connector (similar to the connector in section 2.4.5) as shown in Figure 2-1. Connect a clip lead to the wire on pin 6.
  • Page 14 NARCO AVIONICS AR850 2.2.2 Continued Connect the AR850 to the Pitot Static System Test Set. Apply 14V or 28V power and allow the system to stabilize for 5 minutes. Check pins 3, 4, 5, 9, 10, 11, 12, 13 with the ohmmeter. They should all read a high resistance of 1 megohm or higher.

  • Page 15: Mechanical Installation

    Figure 2-3A is a 1:1 Tray Template. Figure 2-3B is a 1:1 Case Template. 2.3.1 Static Connections As shown here, a plastic static adapter is shipped installed on the AR850 to facilitate preinstallation bench checks and/or installation with 1/4 inch ID hosing to the aircraft's static system.
  • Page 16 NARCO AVIONICS AR850 AR850 UNIT DIMENSIONS TRAY DIMENSIONS FIGURE 2-2 AR850 MECHANICAL DIMENSIONS ( not to scale ) 7/03...
  • Page 17 INSTALLATION SECTION 2 FIGURE 2-3A AR850 TRAY (not to scale) 7/03...
  • Page 18 NARCO AVIONICS AR850 THIS PAGE INTENTIONALLY LEFT BLANK. 7/03...
  • Page 19 INSTALLATION SECTION 2 FIGURE 2.3B AR850 CASE MOUNTING (not to scale) 7/03...
  • Page 20 NARCO AVIONICS AR850 THIS PAGE INTENTIONALLY LEFT BLANK. 7/03...

  • Page 21: Electrical Installation

    If the ground source is an active device, when it is ON (active low), it must pull the transponder ENABLE output down to within 0.2V of ground or less. The diode in series with the AR850 ENABLE line has a junction voltage of 0.5V. This voltage must be added to the transponder's active device junction voltage, and the sum not to exceed 0.8V or else the EPROM and the 12 bit A/D...

  • Page 22: Primary Power Requirement

    AR850 ENABLE input must be controlled by a panel mounted switch. 2.4.3 Primary Power Requirement The AR850 accepts 11 to 32 Vdc for its primary power; therefore NO voltage converter is required for 28V aircraft electrical systems. AR850 incorporates "altitude...

  • Page 23: Interconnect Cable Fabrication

    Position cable clamp and hole filler. c) Close the hood's lid and tighten 3 phillips screws. d) Attach P101 to the AR850 with 2 connector hold-down screws. Figure 2-5 shows the pin assignments to P101. Interconnect wiring diagrams are provided in Section 2.4.7 APPENDIX.

  • Page 24: Correspondence Test

    ±125 feet (38.1 meters) when the pressure datum is set for 29.921 inches of mercury absolute (1013.25 millibars). 2.4.6.1 Test Equipment Requirements Any test equipment capable of "reading " the code generated by the AR850 and/or replies transmitted by the transponder is acceptable. most convenient...
  • Page 25 Pump the altimeter and altitude reporter or static system between -500 +7000 Verify several test points (chosen checking technician), after AR850 data transition, that the altimeter reads within ±125 reported altitude transmitted transponder. If the altimeter correspondence exceeds 125 ft., altimeter calibration should be suspected.

  • Page 26: Interconnect Wiring Diagrams

    - - - C4 - - - - - - - - - - - - P101-12 NOTE:AT50/50A Transponders must comply with Narco service Bulletin AT-50A-5 dated Feb. 19, 1975. FIGURE 2-6 AR850 TO AT155, AT150 OR AT50/50A INTERCONNECTIONS 2-14 7/03...
  • Page 27 INSTALLATION SECTION 2 2.4.7.2 AR850 to KING KT 76/78 2 AMPS 11 - 32 VDC AVIONICS BUS P101-14 AIRFRAME GROUND P101-15 P1-12 - - - ENABLE - - - - - - - - - - P101-6 P1-6 - - - - - A1 - - - - - - - - - - - - P101-2...
  • Page 28 NARCO AVIONICS AR850 2.4.7.3 AR850 to KING KT 76A/78A/79 2 AMPS 11 - 32 VDC AVIONICS BUS P101-14 AIRFRAME GROUND P101-15 ENABLE P101-6 P1-M - - - - - A1 - - - - - - - - - - - - P101-2...

  • Page 29: Post Installation Tests

    INSTALLATION SECTION 2 POST INSTALLATION TESTS To certify the installation, FAA Form 337 must be completed. In addition, weight and balance or any operating limitations must be entered into the aircraft logbook. Refer to the current Federal Aviation Regulations for any additional requirements.
  • Page 30 NARCO AVIONICS AR850 THIS PAGE INTENTIONALLY LEFT BLANK 2-18 7/03...
  • Page 31 Since the AR850 is TSO'd, the parallel digital code is that set forth in the International (ICAO) Standard code for SSR Pressure Altitude Transmission. OPERATION The AR850 is a remote mounted unit that is fully automatic in operation. The companion transponder normally...
  • Page 32 NARCO AVIONICS AR850 THIS PAGE INTENIONALLY LEFT BLANK 7/03...
  • Page 33 HISTORY FILE RELEASED: 06/01 Page 1-I Added AT155 to line 2.4..7.1 and 2-6 07/2003 Page 2-9 Added AT155 to 2.4.1 1. Page 2-14 Added AT155 to line 2.4.7.1 Added 155 to graphic Added breaker symbol under 2 AMPS Added ground symbol next to P101-15 Added AT155 FIGURE 2-6 line Page 2-15 Added breaker symbol under 2 AMPS...
  • Page 34 THIS PAGE INTENIONALLY LEFT BLANK...

  • Page 35: Operation

    THIS FORM TO BE FILED WITH THE OWNER'S AVIONICS RECORDS. NOMENCLATURE: AUTOMATIC PRESSURE ALTITUDE CODE GENERATING EQUIPMENT MODEL: AR-850 TSO NUMBER: C88a MANUFACTURER: NARCO AVIONICS, INC. ADDRESS: 270 COMMERCE DRIVE FORT WASHINGTON, PA 19034 SECTION /2/ CONDITIONS PARAGRAPH # DESCRIPTION OF CONDUCTED TESTS TEMPERATURE ANDALTITUDE 4.0 Rev.
  • Page 36 SAND AND DUST 12.0 EQUIPMENT IDENTIFIED AS 'X’ TESTED FOR THIS FEATURE FUNGUS 13.0 EQUIPMENT IDENTIFIED AS 'X’ TESTED FOR THIS FEATURE SALT SPRAY 14.0 EQUIPMENT IDENTIFIED AS 'X’ TESTED FOR THIS FEATURE MAGNETIC EFFECT 15.0 EQUIPMENT TESTED TO CATEGORY “Z” POWER INPUT 16.0 EQUIPMENT TESTED TO CATEGORY “B”...

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