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- Page 1 DFQ40K Fuel Quantity Test Set USER INSTRUCTION MANUAL P/N: 101-01501 & 101-01502 M/N: DFQ40K Doc. P/N: 56-101-0501_01502 Revision D January 15, 2021 ____________________________________ Copyright © 2021 Barfield Inc. All Rights Reserved.
- Page 2 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 3 (if necessary, with qualifications from an approved training establishment). Follow good engineering practices at all times. Intrinsic Safety: The DFQ40K test set was designed to comply with Boeing Spec.10-61959 Rev. H. Maximum open circuit voltage available at the terminals is +/-5 Volts.
- Page 4 MARKING AND SYMBOLS Warning – Read and understand operator’s manual before using this machine. 56-101-01501_01502 Revision D Page | iii...
- Page 5 In case of malfunction, contact the manufacturer to obtain the list of approved repair facilities worldwide, ensuring that this equipment will be serviced using proper procedures and certified instruments. BARFIELD PRODUCT SUPPORT DIVISION Telephone (305) 894-5400 Shipping Address: (800) 321-1039 Barfield, Inc.
- Page 6 Some notes for Figure A1, “Operation Displays Navigation Guide” (page 37), 260-00780 May 25, 2010 were reworded. 260-01054 November 7, 2014 Updated Barfield logo. Completely Revised. Specifications 260-01289 January 15, 2021 revised to more closely align with applicable standards. 56-101-01501_01502 Revision D...
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Page 7: Table Of Contents
TABLE OF CONTENTS Safety / Warnings / Cautions Marking & Symbols Attention / Contact Contact Information / Maintenance Information Revision Record Table of Contents List of Figures / List of Tables PAGE INTRODUCTION ........................ix 1. PUBLICATION BREAKDOWN ..................ix 2. INFORMATION PROVIDED WITH THE TEST SET ............ix 3. - Page 8 TABLE OF CONTENTS (CONTINUED) PAGE 7. AIRCRAFT INSULATION TEST ..................14 8. AIRCRAFT CAPACITANCE TEST ................16 9. INDICATOR TEST ......................18 10. SYSTEM CALIBRATION, PREFERRED (DRY TANK) ..........20 11. SYSTEM CALIBRATION, ALTERNATE (WET TANK) ..........23 12. BENCH TEST PROBE INSULATION................25 13.
- Page 9 Figure 4 Case Dimensions ....................... 5 Figure 5 Battery Holders ......................6 Figure 6 28VDC Connection ..................... 7 Figure 7 DFQ40K Front Panel and Function Switches ............... 8 Figure 8 DFQ40K Display ......................9 Figure 9 Instruction Manual, P/N 56-101-01501_1502 ............10 Figure 10 Accessory Lead Package P/N 101-01511 ...............11...
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Page 10: Introduction
INTRODUCTION 1. PUBLICATION BREAKDOWN This user instruction manual establishes the standards of operation for the DFQ40K Fuel Quantity Test Set. Its purpose is to provide sufficient information for the personnel unfamiliar with this tester to understand it, identify its parts, and operate it in accordance with proper procedures, operating techniques, precautions and limitations. - Page 11 MOD D: Increase capacitance simulator maximum excitation, new production, customer units as needed. Note: There are no Options for the DFQ40K Test Set as of this writing. C. The Owner's Warranty Registration card (Figure 2), is to be completed by the owner and returned to Barfield, Inc.
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Page 12: Recertification
4. TEST SET EQUIVALENT The Barfield DFQ40K, Fuel Quantity Test Set, is a suitable substitute for the Barfield 190F, 290F, 2548F, 2548G, 2548GA, 2548H, 2624F, 2624G, Model 8000 and AC2K Fuel Quantity Test Sets for all aircraft applications. - Page 13 Figure 3 Limited Warranty 56-101-01501_01502 Revision D Page | xii...
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Page 14: Chapter 1: General
CHAPTER 1: GENERAL 1. INTENDED USE A. The BARFIELD INC. DFQ40K (P/N: 101-01501) is a self-contained Fuel Quantity Test Set. The DFQ40K provides the ability to measure the system Insulation and system Capacitance and also to simulate capacitances for both Tank units and Compensator probe. - Page 15 C. Electrical Specifications FUNCTION RANGE RESOLUTION ACCURACY 40 MΩ 0.01 MΩ Insulation Measure ± 10% ± 0.1 MΩ 400 MΩ 0.1 MΩ ± 10% ± 1 MΩ 4,000 MΩ 1 MΩ ± 10% ± 10 MΩ 20 GΩ 0.1 GΩ ±...
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Page 16: Instructions For Use
3. INSTRUCTIONS FOR USE A. With the Barfield DFQ40K Test Set connected via the appropriate Adapter Cable (not included) to the aircraft indicating system, the user is able to measure Insulation, Capacitance and simulate capacitance to test or calibrate the aircraft system using the prescribed values. -
Page 17: Chapter 2: Ratings
CHAPTER 2: RATINGS 1. SUPPLY VOLTAGES A. The Barfield DFQ40K Test Set is powered from ordinary Alkaline C Cell Batteries. B. There is also provision to power from the aircraft 28 VDC on P/N 101-01502. C. There is no provision to power from AC mains. -
Page 18: Chapter 3: Installation
The user should take inventory of the package contents to insure the following items are there: DFQ40K Fuel Quantity Test Set Standard Accessory Lead Package P/N 101-01511 Instruction Manual P/N 56-101-01501_1502 (this doc) -
Page 19: Grounding (Earthing)
D. Items not included Adapter Interface Harnesses – Contact Barfield with your aircraft requirements. 2. GROUNDING (EARTHING) A. The DFQ40K is equipped with a banana Ground jack labeled GND to ground the test set to the airframe chassis. 3. ELECTRICAL CONNECTIONS A. -
Page 20: Ventilation / Drainage
Figure 6 28VDC Connection 4. VENTILATION / DRAINAGE A. Ventilation No ventilation is necessary or provided. B. Drainage No drainage is necessary or provided. 56-101-01501_01502 Revision D Page | 7... -
Page 21: Chapter 4: Operation
A. On the Display / User Entry Module – refer to Figure 7: (1) The PWR (PoWeR) pushbutton is pressed and held to turn the DFQ40K on or off. (2) The BACK pushbutton is pressed to return back to the previous display screen. - Page 22 AirCraFT (tank units) side of the aircraft interface adapter cable. (3) The IND HI-Z COAX, IND LO-Z TANK and IND LO-Z COMP receptacles are BNC connectors and are used to connect the DFQ40K to the leads proceeding from the INDicating side of the aircraft interface adapter cable.
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Page 23: Positioning
(5) Date - sows the current date as month / day / year. (6) Mode - shows the current Mode of operation and toggles to alternate modes with each depression of the MODE pushbutton as applicable. (7) Units - displays the associated units of measurement. (8) Range - indicates whether the test set is in AUTO range or one of the available five ranges when in Resistance, Insulation or Capacitance Measure or in the Simulation function. - Page 24 Figure 10 Accessory Lead Package P/N 101-01511 Figure 11 6 each Alkaline C Cell Batteries Figure 12 28 VDC Power Cable 56-101-01501_01502 Revision D Page | 11...
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Page 25: Preparation
Consult the Aircraft Maintenance Manual (AMM) and / or Fuel Quantity Indicating System manufacturer's instructions for procedures and specifications. Note: It is recommended that the complete DFQ40K Operation procedures be read before attempting to use the DFQ40K on the aircraft system. -
Page 26: Power On Initialization
For the Four Wire Resistance Measurement, cable P/N 101-01027 is available. If required, contact Barfield Customer Service Dept., to order either one or both P/Ns. D. An accessory power cable, P/N 175-00252, is provided with DFQ40K units identified with P/N 101-01502. In contrast with P/N 101-01501, which is energized only by batteries, P/N 101-01502 can be energized by either batteries or 28 VDC from aircraft power through a 2 Pole-2 Wire Midget Twist-Lock connector. -
Page 27: Menu Displays
Adapter Cable, prepared as supplements to this manual. Contact Barfield, Inc., for a current list of Adapter Cables developed for this Test Set. - Page 28 Adapter Cable AIRCRAFT INDICATOR DFQ40K WIRING AIRFRAME INPUT Do Not Connect CHASSIS Com Link ACFT HI-Z HI-Z HI-Z LO-Z COMP LO-Z LO-Z COMP COMP Figure 15 Aircraft Insulation Test Configuration C. Test Procedure Refer to the specific Maintenance Manuals for proper procedures and calibration values.
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Page 29: Aircraft Capacitance Test
(11) Repeat the test by pressing F3 through F6 for remaining points of testing. (12) Press NEXT to select COMPensator points of test. (13) Press F1 for L/C (default), if not already highlighted. (14) The test is considered satisfactory if the minimum specified is reached. (15) Press F2 for C/H. - Page 30 (3) Connect the Adapter Cable between the Indicator and the aircraft wiring plug. (4) Connect the ground lead from the adapter (if so equipped) or from the Test Set GND receptacle, to a secure airframe ground. Adapter Cable AIRCRAFT INDICATOR DFQ40K WIRING AIRFRAME INPUT Do Not Connect CHASSIS...
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Page 31: Indicator Test
(10 Press F3 to test the Distance To Fault of the HI-Z shield. TANK COMP ZERO (11) Press MODE to select between pF or Feet or Meters. (12) Observe the display reading and verify if the value is within specified tolerance. (13) Press F6 for Self-Test at any time to ensure proper operation. - Page 32 Adapter Cable AIRCRAFT INDICATOR DFQ40K WIRING AIRFRAME INPUT CHASSIS Com Link ACFT HI-Z HI-Z HI-Z LO-Z COMP LO-Z LO-Z COMP COMP Figure 17 Aircraft Indicator Test Configuration C. Test Procedure Refer to the specific Maintenance Manuals for proper procedures and calibration values.
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Page 33: System Calibration, Preferred (Dry Tank)
(13) Press F1 to select SIM (default), if not highlighted. ACFT A & S TANK COMP (14) Close appropriate aircraft Fuel Quantity System circuit breaker(s). (15) Adjust the Empty adjustment screw for a ZERO or EMPTY indicator reading. (16) Press BACK to return to Main screen. (17) Press F5 to select the SIMulator function. - Page 34 (3) Connect the Adapter Cable between the Indicator and the aircraft wiring plug. (4) Connect the ground lead from the adapter (if so equipped) or from the Test Set GND receptacle, to a secure airframe ground. Adapter Cable AIRCRAFT INDICATOR DFQ40K WIRING AIRFRAME INPUT CHASSIS Com Link...
- Page 35 (5) Press F1 to select TANK if not defaulted to. TANK COMP (6) Press MODE for IN if the compensator simulator is required. (7) Press RANGE to select 4,000 pF or 10,000 pF as desired. (8) Using the keypad, enter the ADD FOR FULL TANK capacitance. Example for 123.4 pF: press “1”, then “2”, then “3”, then “.”, then “4”...
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Page 36: System Calibration, Alternate (Wet Tank)
(3) Connect the Adapter Cable between the Indicator and the aircraft wiring plug. (4) Connect the ground lead from the adapter (if so equipped) or from the Test Set GND receptacle, to a secure airframe ground. Adapter Cable AIRCRAFT DFQ40K INDICATOR WIRING AIRFRAME INPUT... - Page 37 C. Test Procedure Refer to the specific Maintenance Manuals for proper procedures and calibration values. (1) Press PWR to turn test set ON. (2) Allow initialization to complete. (3) Press ENT to accept last used frequency or key in new frequency, then press ENT. (4) Press F5 to select the SIMulator function.
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Page 38: Bench Test Probe Insulation
(2) Connect the BNC to mini alligator clip leads between the Test Set ACFT jacks and the associated Probe terminals. Refer to Figure 20. (3) Connect the ground lead from the Test Set GND receptacle to the probe mounting flange (refer to Figure 20). DFQ40K PROBE INPUT Com Link... - Page 39 (3) Press ENT to accept last used Frequency or key in new frequency, then press ENT. (4) Press F3 to select INSulation Measure. AUTO (5) Press MODE to select 3T (default) or 2T as desired. (6) Press RANGE to select AUTO ranging (default) or 40M, 400M, 4,000M or 20G range.
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Page 40: Bench Test Probe Capacitance
(2) Connect the BNC to mini alligator clip leads between the Test Set ACFT jacks and the associated Probe terminals (refer to Figure 21). (3) Connect the ground lead from the Test Set GND receptacle to the probe mounting flange (refer to Figure 21). DFQ40K PROBE INPUT Com Link... - Page 41 (10) Press F6 for Self-Test at any time to ensure proper operation. TANK COMP ZERO (11) This completes the BENCH CAPACITANCE TEST. (12) Press PWR to turn test set OFF. (13) Disconnect the leads from the Test Set. (14) Disconnect the leads from the Probe. 56-101-01501_01502 Revision D Page | 28...
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Page 42: Chapter 5: Receiving, Shipping, And Storage
CHAPTER 5: RECEIVING, SHIPPING, AND STORAGE 1. RECEIVING No special unpacking procedures are necessary. It is recommended that the factory- shipping container and packing materials be retained should it become necessary, for any reason, to re-ship the Test Set, such as for the O.E.M. recertification. It is also recommended that upon receipt the test set should be carefully inspected for damage. -
Page 43: Chapter 6: Maintenance
Barfield for further instructions. 4. CALIBRATION A. The DFQ40K calibration interval is once per annum (12 months). B. Please see the list of approved repair facilities under Maintenance and Repair Information on Page iv of this document for approved repair facilities. -
Page 44: Appendix A: Display Navigation Guide
APPENDIX A: DISPLAY NAVIGATION GUIDE 56-101-01501_01502 Revision D Page | 31... - Page 45 Press NEXT for USER SETTINGS MENU (Refer to Fig. A2) Note: AUTO (F1) function is only applicable for Smart Cable Use For all ten “MEASURE INSULATION” displays: MODE: Toggles 2T / 3T RANGE: Toggles 40 / 400 / 4000 / 20000 / AUTO (M) NEXT: Toggles 1 and 2 groups of screens...
- Page 46 PRESSING NEXT PRESSING BACK Figure A2 Settings Navigation Guide 56-101-01501_01502 Revision D Page | 33...