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barfield DALT55 Instruction Supplement

Digital altimeter instrument
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DALT55
Digital Altimeter Instrument
INSTRUCTION SUPPLEMENT
BARFIELD M/N DALT55
Doc. P/N: 61-101-02184_02186
____________________________________
BARFIELD, INC.
Manual applicable for DALT55 P/Ns:
101-02184
101-02186
DALT55 is Designed to be used with Barfield
Pitot-Static Test Sets (1811 Series) and other
Ground Support Test Equipment.
Not for aircraft installation.
Revision B
January 10, 2013

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  • Page 1 Email: gsesales@barfieldinc.com Barfield Inc. Confidential and Proprietary Information. This document and all the information contained herein is the sole property of Barfield Inc. No intellectual property rights are granted by the delivery of this document or the disclosure of its content.
  • Page 2 DALT55 INSTRUCTION SUPPLEMENT CONTACT INFORMATION Users are requested to notify the manufacturer of any discrepancy, omission, or error found in this manual. Inquiries should include specific questions and reference the publication title, number, chapter, page, figure, paragraph, and effective date.
  • Page 3 DALT55 INSTRUCTION SUPPLEMENT REVISION RECORD REV. ECO # REV. DATE DESCRIPTION OF CHANGE First Issue. New Manual to be use for both part numbers 101-02184 & 101- 02186. May / 20 /11 For P/N 101-02184 this document revision supersedes document number...
  • Page 4 P.O. Box 025367 Miami, FL 33102-5367 RECERTIFICATION Barfield Digital Airspeed Instruments, P/Ns 101-02184 and 101-02186, have a one-year recertification requirement. Qualified technicians in a shop equipped with the necessary tooling, facilities, and Barfield-approved procedures must perform the maintenance required by these units.
  • Page 5 DALT55 INSTRUCTION SUPPLEMENT 61-101-02184_02186-B Page v Jan /10 /2013...
  • Page 6 DALT55 INSTRUCTION SUPPLEMENT LIST OF ACRONYMS / TERMS USED CCW ..............Counterclockwise CW ..............Clockwise EEPROM ............Electrically Erasable Programmable Read-Only Memory EPR ..............Engine Pressure Ratio FS..............Full Scale Ft............... Feet F/W ..............Firmware InHg ..............Inches of mercury Km/hr ..............

  • Page 7: Table Of Contents

    TABLE OF CONTENTS Contact Information Revision Record List of Approved Repair Facilities Limited One Year Warranty List of Acronyms / Terms Used Table of Contents GENERAL INFORMATION 1.1 Purpose ..................1.2 Description ..................1.3 Features ..................DIGITAL ALTIMETER SPECIFICATIONS ... (P/N 101-02184 and 101-02186) INSPECTION ..................
  • Page 8 DALT55 INSTRUCTION SUPPLEMENT THIS PAGE INTENTIONALLY LEFT BLANK 61-101-02184_02186-B Page viii Jan /10 /2013...

  • Page 9: General Information

    1811 Pitot-Static Test Set series and equivalent testers. The fit, form and size of the DALT55 allows for easy installation into the test set. Description Data on the DALT55 shows on a graphic liquid crystal display (LCD). The display is backlit with an auto-shutdown timer for battery life protection.

  • Page 10: Digital Altimeter Specifications

    DALT55 INSTRUCTION SUPPLEMENT DIGITAL ALTIMETER SPECIFICATIONS – (P/N 101-02184) The DALT55 specifications meet the requirements described in Federal Aviation Regulation Part 43 Appendix-E, which defines the requirements for accuracy of an aircraft’s altimeter and as such is reference for the accuracy of Pitot-Static testers.
  • Page 11 DALT55 INSTRUCTION SUPPLEMENT DIGITAL ALTIMETER SPECIFICATIONS – (P/N 101-02186) The DALT55 specifications meet the requirements described in Federal Aviation Regulation Part 43 Appendix-E, which defines the requirements for accuracy of an aircraft’s altimeter and as such is reference for the accuracy of Pitot-Static testers.
  • Page 12 ON/OFF) Battery Life: With Rechargeable BP4000 30 Hrs, single instrument NiMH, P/N 137-00009 15 Hrs, Two instrument configuration (DALT55 & DAS650) With Rechargeable BP4015 30 Hrs, single instrument NiMH, P/N 137-00030 15 Hrs, Two instrument configuration (DALT55 & DAS650) Note: BP4000 &...

  • Page 13: Inspection

    All test sets must be recalibrated in precise time periods for their readings to remain valid. The DALT55 has a one-year recalibration period, for more details see the note in the Stability specification (page 2). During the last 30 days before the expiration of this period, a message displays at the end of the initialization sequence to remind the user that the instrument must be sent for recalibration to a Barfield Inc.
  • Page 14 DALT55 INSTRUCTION SUPPLEMENT FUNCTION KEYS Key (s) Location Function Top, right of display Powers on instrument ON/OFF Backlight Right of display Illuminates display Left of display Contrast adjustment “+” and “-“ Access menus and control Soft (multi-functional) Bottom of display instrument  a Sabena technics company...

  • Page 15: Operation

    NOTE: There is a delay of several seconds before start-up sequence appears and the unit initializes. For two-instrument operations, turn on DALT55 at the same time as DAS650. (A message appears showing the link is successful. If DAS650 is not on, the instrument displays a message that reminds the user to do so.)

  • Page 16: Start-Up Procedure

    Main menu options include: Units, Display, EPR Test, Maintenance, and Exit. 1) UNITS The DALT55 may be changed and configured to display several units of measurement. After selecting AERONAUTICAL, press CHANGE (located bottom left corner on display). Use the arrow keys to select ft &...

  • Page 17: Display

    Pressure display shows static (Ps) pressure. 3) EPR TEST (Engine Pressure Ratio) Note: EPR is only available if DAS650 and DALT55 are connected. Using the Maintenance menu in Level 1, both instruments must also be configured for the two-instrument configuration.

  • Page 18: Level 2 Submenu

    Date last calibration was performed (d) Config. This option allows user to configure instrument, selecting: Stand-alone: DALT55 is not communicating with DAS650. Two-instrument: DALT55 is communicating with DAS650. Note: In the two-instrument configuration, the serial link indicator shows at bottom of Aeronautical, Pressure, Leak Test and EPR Test displays.
  • Page 19 DALT55 INSTRUCTION SUPPLEMENT (b) Date / Time To set date or time, use the up / down arrow keys to increase / decrease selection.) CHANGE (Set) DATE as MM / DD / YY CHANGE (Set) TIME as hr / min.

  • Page 20: Static Leak Test

    DALT55 INSTRUCTION SUPPLEMENT STATIC LEAK TEST NOTE: Press CANCEL to exit leak test at any time during procedure and to return to Aeronautical display. STATIC PRETEST NOTE: For more specific information regarding the control valves and ports, refer to the Test Set Operations Manual.
  • Page 21 DALT55 INSTRUCTION SUPPLEMENT During the stabilization period, verify the altitude on the display. NOTE: A rapid decrease in altitude (more than 100 ft/min) indicates presence of a leak. Stop Leak Test. (To discontinue the test, press CANCEL and skip to step m.) After the 60-second stabilization time, the Static Leak Test screen shows the start of the actual leak test.

  • Page 22: Static Leak Test

    From the Main Menu, select EPR TEST (Main Menu, 5.3). EPR Test display appears. NOTE: The EPR function of the DALT55 allows display of the EPR ratio PT7/PT2, also PT2 and PT7 pressures individually. Units of measure available for the PT2 and PT7 pressure display are: inHg, mbar and PSIA.
  • Page 23 APPENDIX INSTALLATION INSTRUCTIONS FOR: Digital Instruments ......Section 1 Rechargeable Battery Pack ....Section 2 Alkaline Battery Pack ......Section 3...
  • Page 24 Section 1: DIGITAL INSTRUMENTS (MOUNTING, ASSEMBLING, INSTALLATION) 1. Remove front panel from test set. 2. Remove the analog instrument(s) from panel. 3. Drill captive nuts on altimeter and airspeed mounting holes to remove threads with drill bit #28. NOTE: Do not drill the captive nuts on the VSI instrument hole. 4.
  • Page 25 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 26 VSI (center) instrument hole installation: NOTE: For Barfield Test Sets with 3 instruments, the battery pack base can be mounted in the VSI (center) instrument hole. 1. Mount battery pack base (Item 1, Figure 1) using the 4 (each), 6-32 x 7/8” L Phillips head screws provided (Item 4, Figure 1).
  • Page 27 CAUTION: Use care when locating the base. Battery pack must not interfere with top covers, miscellaneous items, storage compartments, etc. BLACK GREEN (PIN #1) FIGURE 2 3. Connect the wire harness (Item 1, Figure 3) to digital instrument(s) and battery pack base harness (Item 2, Figure 3).
  • Page 28 1. Mount battery pack base (Item 1, Figure 4) on test set panel with the 4 (each), 6-32 x ½ L flat head screws and 4 (each) 6-32 self-locking nuts provided. NOTE: For Barfield Test Sets, battery pack base mounts in the same location as the correction cards. Remove the clear polycarbonate cover and correction cards from the panel.
  • Page 29 NOTES: KEEP WIRES ROUTED AS SHOWN AND AS CLOSE AS POSSIBLE TO BOSSES. FIGURE 4 Barfield Inc. DIGITAL INSTRUMENT Barfield Inc. DIGITAL INSTRUMENT FIGURE 5 APPENDIX: INSTALLATION INSTRUCTIONS Jan /10 /2013 Page 7/8...
  • Page 30 FIGURE 6 APPENDIX: INSTALLATION INSTRUCTIONS Jan /10 /2013 Page 8/8...

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