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barfield DC400, User Instruction

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61-101-00802.EF2 (REV. G) 

CH. 2 

January 7, 2015 

Page 17 of 44 

 

Figure 8   Capacitance Test 1900C / 1900D, UC and UE Individual Probes 

 
 

D. Test 

Procedure 

 

(1)  Rotate the Probe Selector Unit switch to ALL. 
(2)  Set the T/S switch to ON. 
(3)  Press and hold in the PRESS TO READ CAP (pF) pushbutton. 
(4)  Verify that the value shown is within tolerances specified in Table 4, 

Table 5 (for empty tanks) or Table 6, or Table 7 (for full tanks). 

(5)  Release the pushbutton. 

 
 

 

 

Note:  The following values are valid as of this publication’s release 

date and provided as reference.  Refer to the Aircraft 
Maintenance manual for actual test values. 

 
 
 
 
 
 
 
 
 
 

Summary of Contents for DC400

Page 1: ...rfieldinc com Email gsesales barfieldinc com Copyright 2015 Barfield Inc All Rights Reserved Barfield Inc Confidential and Proprietary Information This document and all the information contained herei...

Page 2: ...THIS PAGE INTENTIONALLY LEFT BLANK...

Page 3: ...ter Module especially designed for the DC 400 DC 400A Digital Fuel Quantity Test Sets It contains complete instructions for the maintenance inspection testing troubleshooting and calibration of the Gu...

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Page 5: ...nd covers MOD B or earlier releases of 101 00802 For Mod C or later releases of adapter module Modifications to the company logo company contact information and listed part 101 00814 were implemented...

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Page 7: ...ization RMA number will be assigned during this call to keep track of the shipment and the service BARFIELD PRODUCT SUPPORT DIVISION Telephone 305 894 5400 Shipping Address 800 321 1039 Barfield Inc F...

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Page 9: ...REQUESTED TO NOTIFY THE MANUFACTURER OF ANY DISCREPANCY OMISSION OR ERROR FOUND IN THIS SUPPLEMENT PLEASE SEND YOUR COMMENTS TO BARFIELD INC ATTN GSTE 4101 NORTHWEST 29TH STREET MIAMI FL 33142 USA TEL...

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Page 11: ...List of Tables PAGE 1 Description 1 2 Operation 1 System Insulation Test 3 2 Insulation Test Individual Probes 8 3 System Capacitance Test 12 4 Capacitance Test Individual Probes 15 5 Indicator Test 2...

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Page 13: ...gaohm Conversion 6 2 Tank Capacitance Empty 14 3 Tank Capacitance Full 14 4 Probe Capacitance Empty 1900 1900C UA and UB 18 5 Probe Capacitance Empty 1900C 1900D UC and UE 18 6 Probe Capacitance Full...

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Page 15: ...ntenance Manual for specific procedures and maintenance practices D Equipment Required or equivalent 1 DC400A Digital Fuel Quantity Test Set P N 101 00850 or the DC400 Digital Fuel Quantity Test Set P...

Page 16: ...irst Then perform one of the Indicator tests System or Bench and if necessary the Probe Bench test These tests will provide an effective means for troubleshooting the system 2 After performing an indi...

Page 17: ...ing pilot fuel panel insure aircraft battery is disconnected 2 Access the indicator 3 Open the circuit breakers Caution When breaking or making indicator connections insure that the applicable circuit...

Page 18: ...d 2 2 Connect the test set ACFT connector to the aircraft wiring plug removed from the indicator 3 Connect the test set ACFT connector to the ACFT connector of the adapter cable 4 Do not connect the t...

Page 19: ...Setup D Test 1 Set the test set ON OFF switch to ON 2 Allow time for the test set display to stabilize 3 Verify that the test set reading is less than 50nS Note The display reading is in nS nano Sieme...

Page 20: ...than 50 nS at each position except SIG RTN 7 With switch rotated to SIG RTN verify an over range test set reading of 1 Note If P N 114 389001 17 probe Gull Airborne is installed in the collector tank...

Page 21: ...ng the interconnect fuel line receptacle Then repeat test Verify that the reading with the fuel panel select switch in any position is less than 005 nS If fault remains the problem may be with the a c...

Page 22: ...to OFF 2 Rotate the TEST FUNCTION switch to IND AMP 3 Set the INSULATION SYSTEM switch to INSULATION 4 Rotate the INS TEST POINTS switch to LO Z GND 5 Set the AUX MAIN switch to MAIN TOT C Connecting...

Page 23: ...61 101 00802 EF2 REV G CH 2 January 7 2015 Page 9 of 44 INSULATION TEST Figure 3 1900 1900C UA UB Individual Probes...

Page 24: ...g never completely stabilizes If the reading is in the acceptable range after 30 seconds it should be considered OK 4 Verify that the T S display reading is less than 50 nS Refer to Table 1 5 Rotate t...

Page 25: ...s in the SIG RTN position Note When reading are taken on an individual probe or several probes in parallel readings when the switch is in the SIG RTN pos will range between 1500 and an overrange of 1...

Page 26: ...the indicator 3 Open the circuit breakers 4 Disconnect the aircraft wiring plug located at the indicator B Test Set Preparation 1 Set the test set ON OFF switch to OFF 2 Rotate the TEST FUNCTION switc...

Page 27: ...set ON OFF switch to ON 2 If testing aircraft S N s UC or UE set the aircraft fuel panel select switch to MAIN or TOTAL 3 Push and hold the test set PRESS TO READ CAP pF pushbutton 4 Verify that the t...

Page 28: ...X 7 Push and hold the PRESS TO READ CAP pF pushbutton 8 Verify that the tanks value is within tolerances as specified in Table 2 Empty and Table 3 Full Note Ensure that capacitance is within specifica...

Page 29: ...n the circuit breakers 3 Disconnect the aircraft connector at the Interconnect Fuel Line Receptacle if testing UA or UB serial numbers or the Main Harness disconnect and Aux Harness disconnect if test...

Page 30: ...to the Interconnect Fuel Line Receptacle connector if testing 1900 1900C UA and UB or to the Main Harness disconnect and Aux Harness disconnect if testing UC and UE 3 Connect the adapter cable to the...

Page 31: ...T S switch to ON 3 Press and hold in the PRESS TO READ CAP pF pushbutton 4 Verify that the value shown is within tolerances specified in Table 4 Table 5 for empty tanks or Table 6 or Table 7 for full...

Page 32: ...d 114 389001 5 7 19 82 22 02 24 22 Center Section Inboard 114 389001 21 23 14 91 16 57 18 23 Collector Tank 114 389001 17 19 7 24 8 04 8 84 Table 4 Probe Capacitance Empty in pF AIRCRAFT 1900C 1900D U...

Page 33: ...389001 5 7 39 1 43 46 47 8 Center Section Inboard 114 389001 21 23 29 1 32 35 35 6 Collector Tank 114 389001 17 19 10 5 11 71 12 9 Table 6 Probe Capacitance Full in pF AIRCRAFT 1900C 1900D UC and UE...

Page 34: ...ch probe is within the tolerances specified in Table 4 or Table 5 for empty tanks or Table 6 or Table 7 for full tanks Note If any probe capacitance is out of specifications refer to the A C Maintenan...

Page 35: ...l insure aircraft battery is disconnected 2 Access the indicator 3 Open the appropriate circuit breakers 4 Disconnect the aircraft wiring plug located at the indicator B Test Set Preparation 1 Set the...

Page 36: ...61 101 00802 EF2 REV G CH 2 January 7 2015 Page 22 of 44 Figure 9 Indicator Test Set Connection Figure 10 Indicator Test Set Connection...

Page 37: ...ding replace the indicator 11 Rotate the TEST FUNCTION switch to CAP SIM CAL NORM SYS 12 Set the 200 pF 1000 pF switch to 1000 pF 13 Set the CAP SIM pF 100 s thumbwheel to 2 Set the 10 s thumbwheel to...

Page 38: ...n a test set reading of 178 9 pF UA and UB or 185 0 pF UC and UE 36 Rotate the TEST FUNCTION switch to IND AMP 37 Verify the indicator reads 300 35 lbs 38 Rotate the TEST FUNCTION switch to CAP SIM CA...

Page 39: ...ers 51 Rotate the TEST FUNCTION switch to IND AMP 52 Verify the indicator reads 1200 35 lbs 53 Set the test set ON OFF switch to OFF E Disconnecting Reconfiguring 1 Open the circuit breakers 2 Disconn...

Page 40: ...raft Preparation CAUTION Refer to the Aircraft Maintenance Manual for proper defueling and fueling procedures Observe all safety precautions 1 Ensure aircraft is defueled Drain sumps 2 Disconnect the...

Page 41: ...t acceptable use the EMP 1 E 1 or E EMP adjustment on rear of indicator to obtain the correct pointer position 8 Rotate the TEST FUNCTION switch to ADD CAP 9 Verify the indicator reads 1400 lbs UA and...

Page 42: ...Disconnect the test set ACFT connector from aircraft wiring plug or the adapter cable 3 Disconnect the test set IND connector from the indicator or adapter cable 4 Disconnect the adapter cable from th...

Page 43: ...pairs are made to the harness following this test then the Preferred Calibration must be repeated and subsequently this integrity test A Aircraft Preparation 1 Disconnect aircraft battery Caution When...

Page 44: ...craft battery ON OFF switch ON 14 Set the test set ON OFF switch to ON Caution Do not tap bezel of instrument to vibrate To remove friction gently tap adjacent panel or rear housing of indicator befor...

Page 45: ...adjusting CAP SIM pF control knob to obtain the summed value 28 Release the pushbutton 29 Rotate the TEST FUNCTION switch to IND AMP Caution Do not tap bezel of instrument to vibrate To remove fricti...

Page 46: ...OFF switch to OFF if applicable 48 Disconnect the aircraft battery if previously connected 49 Connect the test set to the Indicator as shown in either Figure 5 or 6 as applicable 50 Reconnect the air...

Page 47: ...nectors 58 Set the test set ON OFF switch to OFF E Disconnecting or reconfiguring 1 Open the circuit breakers Caution When lowering or raising the fuel panel ensure aircraft battery switch is OFF and...

Page 48: ...to SYSTEM 4 Set the MAIN TOT AUX NAC switch to MAIN TOT 5 Set the 200 pF 1000 pF switch to 200 pF B Connecting Test Set 1 Refer to Figure 11 and connect the test set to the probe as shown 2 Connect th...

Page 49: ...lay probe capacitance 3 Verify probe capacitance is within the tolerance referenced in Table 4 through Table 7 4 If value is not within tolerance reject probe 5 Set the test set ON OFF switch to OFF 6...

Page 50: ...If testing the 1900 1900C UA and UB an over range also appears when the INS TEST POINT switch is in LO Z RTN position and P N 114 389001 17 Probe Gull Airborne is installed in the collector tank 15 V...

Page 51: ...ation 1 Set the ON OFF switch to OFF 2 Rotate the TEST FUNCTION switch to CAP SIM CAL NORM SYS 3 Set the INSULATION SYSTEM switch to SYSTEM 4 Set the MAIN TOT AUX NAC switch to MAIN TOT 5 Set the 200...

Page 52: ...UA and UB serial numbers or 159 4 for UC and UE serial numbers 4 Release the pushbutton 5 Rotate the TEST FUNCTION switch to IND AMP 6 Set the 28 VDC power supply ON OFF switch to ON Caution Do not t...

Page 53: ...and UE If testing 1900 1900C UA and UB skip to step 30 19 Rotate the TEST FUNCTION switch to CAP SIM CAL NORM SYS 20 Set the 200 pF 1000 pF switch to 200 pF 21 Set the CAP SIM pF 100 s thumbwheel to S...

Page 54: ...0 s thumbwheel to 2 UA and UB or to 3 UC and UE 46 Press and hold the PRESS TO READ CAP pF pushbutton while adjusting the CAP SIM pF control knob to obtain a test set display of 223 6 pF UA and UB or...

Page 55: ...s known and used instead of EMPTY values referenced in Table 2 Tank Capacitance Empty The ADD FOR FULL values listed in Table 4 should be added to the known values to obtain the CAP SIM value for FULL...

Page 56: ...61 101 00802 EF2 REV G CH 3 January 7 2015 Page 42 of 44 Figure 15 Alternate Calibration Test Set Setup Figure 16 Alternate Calibration Test Set Setup...

Page 57: ...nter position is not acceptable adjust EMP 1 E 1 or E EMP adjustment on rear of indicator for the pointer position 9 Rotate the TEST FUNCTION switch to CAP SIM CAL NORM SYS 10 Set the 200 pF 1000 pF s...

Page 58: ...indicator shows zero lbs 25 If indicator reading is not acceptable use the EMP 2 E 2 adjustment located at the rear of the indicator to obtain the correct reading 26 Repeat steps 2 through 25 until an...

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