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Narco Avionics AR850 Installation And Operation Manual

Manual is about: Altitude Reporter

Summary of 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: 215-643-0197 customer service line: 215-6...

  • Page 3

    Section topic page 1.1 introduction ...................................... 1-1 1.1.1 manual organization ............................... 1-1 1.2 product description ............................... 1-1 1.3 design features ................................... 1-2 1.4 product specifications ...............

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  • Page 5

    General information section 1 7/03 1-1 1.1 introduction in support of the narco avionics ar850 altitude reporter, this manual provides detailed installation and maintenance procedures. This manual is intended for use by persons who are qualified to service the equipment described in this manual purs...

  • Page 6

    Narco avionics ar850 1-2 7/03 1.3 design features - reports altitude up to 30,700 feet (9,357 meters). - incorporates a piezoresistive pressure sensor. - no complex gears, shafts or optical discs are used which increases the unit's reliability. - directly compatible with most current production tran...

  • Page 7

    General information section 1 7/03 1-3 1.4 product specifications, continued electrical input power : 11 to 32 vdc at 1.4 amps maximum during the first 3 minutes of operation. 0.35 amps average after 3 minutes of operation. Environmental tso c88 (a) do160b environmental catagory b1b/a/nom/xxxxxxbbbb...

  • Page 8

    Narco avionics ar850 1-4 7/03 1.5 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

    General information section 1 7/03 1-5 1.7 tso explanation the ar850 is designed to be remote mounted within a non- pressurized but controlled temperature location within an aircraft that is operated up to 30,700 msl. This equipment requires direct current power, but may be installed in aircraft hav...

  • Page 10

    Narco avionics ar850 1-6 7/03 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 these limits have been tested under the standard humidity environmen...

  • Page 11

    General information section 1 7/03 1-7 power input - category b this equipment is designed for use in aircraft electrical systems supplied by an engine driven alternator/rectifiers or dc generator with a battery of significant capacity floating on the dc bus at all times. 28v system 14v system norma...

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    Narco avionics ar850 1-8 7/03 this page intentionally left blank.

  • Page 13

    Installation section 2 7/03 2-1 2.1 introduction this section provides all the electrical and mechanical installation information. Electrical and mechanical installation sections are independent and self-supporting. This permits their removal from the manual allowing the electrical and mechanical in...

  • Page 14

    Narco avionics ar850 2-2 7/03 2.2.2 continued 1. Connect the ar850 to the pitot static system test set. Apply 14v or 28v power and allow the system to stabilize for 5 minutes. 2. 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. 3....

  • Page 15

    Installation section 2 7/03 2-3 2.3 mechanical installation the ar850 must be located within the internal structure of the aircraft. The location area to be non-pressurized and temperature controlled. It should be located away from the heater or fresh air vents that lead to very rapid changes of tem...

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    Narco avionics ar850 2-4 7/03 ar850 unit dimensions tray dimensions figure 2-2 ar850 mechanical dimensions (not to scale).

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    Installation section 2 7/03 2-5 figure 2-3a ar850 tray (not to scale).

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    Narco avionics ar850 2-6 7/03 this page intentionally left blank..

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    Installation section 2 7/03 2-7 figure 2.3b ar850 case mounting (not to scale).

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    Installation section 2 7/03 2-9 2.4 electrical installation this section presents the required technical information necessary to plan and execute electrical installation of the ar850. Refer to section 2.4.7 "interconnect wiring diagrams" for installation of the ar850 to narco and king transponders....

  • Page 22

    Narco avionics ar850 2-10 7/03 2. If the transponder's internal enable source is a permanent ground and not altitude mode controlled, the ar850 will be permanently enabled. When the altitude reporter is permanently enabled, the companion transponder must have additional internal circuitry designed t...

  • Page 23

    Installation section 2 7/03 2-11 2.4.5 interconnect cable fabrication an interconnecting cable must be fabricated by the installing agency. Figure 2-4 shows the assembly of the ar850 connector p101. 1) strip wire as shown in fig. 2-4. Maximum wire size is # 20 awg. 2) tin exposed lead. Be sure no in...

  • Page 24

    Narco avionics ar850 2-12 7/03 figure 2-5 p101 pin assignments 2.4.6 correspondence tests a data correspondence check between automatically reported pressure altitude and the pilot's altitude (aircraft altimeter) reference is required. The ar850 altitude reporter shall correspond to the aircraft alt...

  • Page 25

    Installation section 2 7/03 2-13 2. Attach the vacuum/pressure pump system and set up the altitude reporter/transponder test equipment. 3. Adjust the altimeter barometric setting to 29.92 inches of mercury so the altimeter hands correspond with the altitude reporter's data output. 4. Pump the altime...

  • Page 26

    Narco avionics ar850 2-14 7/03 2.4.7 interconnect wiring diagrams this section provides interconnect wiring instructions for connecting the ar850 to narco and king transponders. 2.4.7.1 ar850 to at155/at150/at50/50a installation 2 amps 11 - 32 vdc avionics bus p101-14 airframe ground p101-15 p101-5 ...

  • Page 27

    Installation section 2 7/03 2-15 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 p1-4 - - - - - b1 - - - - - - - - - - - - p101-5 p1-3 - - - - - c1 - - - - - ...

  • Page 28

    Narco avionics ar850 2-16 7/03 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 p1-e - - - - - b1 - - - - - - - - - - - - p101-5 p1-d - - - - - c1 - - - - - - - - - - - - p101-11 p1-k - ...

  • Page 29

    Installation section 2 7/03 2-17 2.5 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 requi...

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  • Page 31

    Operation section 3 3.1 general the purpose of the ar850 altitude reporter is to establish a digital code which is a direct function of aircraft altitude. Since the ar850 is tso'd, the parallel digital code is that set forth in the international (icao) standard code for ssr pressure altitude transmi...

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    Narco avionics ar850 this page intenionally left blank 3-2 7/03.

  • Page 33: History File

    History file released: 06/01 07/2003 page 1-i added at155 to line 2.4..7.1 and 2-6 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 sym...

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  • Page 35

    Environmental qualification form note: 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/ cond...

  • Page 36

    Sand and dust 12.0 equipment identified as 'x’ not tested for this feature fungus 13.0 equipment identified as 'x’ not tested for this feature salt spray 14.0 equipment identified as 'x’ not tested for this feature magnetic effect 15.0 equipment tested to category “z” power input 16.0 equipment test...