8628196-REVA (QA TEST PROCEDURES FOR VLF_LF LOOP ANTENNA ASSEMBLY).pdf

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8628196

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AIS:8628196 Rev A (WORD2016)

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8628196-REV-

2020-01-10 C. SHAW

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07-18 QA Test Procedures for the

VLF/LF Loop Antenna Assembly

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Table 1. Reference Documents

NO. DOCUMENT ID TITLE

1 8628188 ANTENNA ASSEMBLY

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Table 2. Sheet Index

SHT DESCRIPTION

1 Cover

2 References

3 Index

4 General Notes

5 Instruments and Materials List

6-10 QA Test Procedures

11 Signature Page

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GENERAL NOTES

1. This QA test procedure is for use with VLF/LF Loop Antenna, manufactured from drawing 8628188.

For all antenna assembly item callouts in this procedure, refer to 8628188 and related drawings.

2. The manufacturer has the discretion to choose the meter(s) used for making the measurements described herein as long as they meet the precision/accuracy requirements of 0.001/5% for resistance and 10H/1% for inductance.

3. Inductance is to be measured at a test frequency of 10 kHz.

4. Resistance is to be measured at DC if possible or the lowest available frequency not to exceed 1 kHz.

5. Ensure that the meter(s) used herein are allowed to warm up for the time recommended by the manufacturer for the most accurate results.

6. When performing the electrical verification tests, all metal and substances with relative magnetic permeability >1 must be kept a minimum of four (4) feet away from the antenna to prevent interference with test readings.

7. Record meter(s) descriptions and settings and other misc. hardware used for the testing conducted herein in the tables contained on sheet 5.

8. Equipment needed for testing:

• Inductance meter and test leads

• Resistance meter and test leads

• F/A and ATH Start and Finish pins o Contact, heavy duty, crimp, pin, 8AWG o Harting P/N: 09320006109

• F/A and ATH Start and Finish sockets o Contact, heavy duty, crimp, socket, 8AWG o Harting P/N: 09320006209

• Compass

• 1.5 VDC battery and test leads

9. The QA tests contained in this drawing are intended to identify a construction that is not capable of satisfying final ANTENNA ASSEMBLY quality assurance testing before and after the construction is encapsulated with potting material. If any QA test fails, refer to the NAVSEA 8628188 assembly drawings to verify that there were no assembly mistakes.

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Table 3. Meter #1 Description and Settings

Parameter DESCRIPTION/DOCUMENT NUMBER

Model

Manufacturer

Serial Number

Calibration Date

Measurement Type

Test Frequency

Test Signal Level(s)

Measurement Mode

Range Setting

Measurement Rate

Table 4. Meter #2 Description and Settings (if applicable)

Parameter DESCRIPTION/DOCUMENT NUMBER

Model

Manufacturer

Serial Number

Calibration Date

Measurement Type

Test Frequency

Test Signal Level(s)

Measurement Mode

Range Setting

Measurement Rate

Table 5. Misc. Test Hardware

No. CAGE ITEM QTY DESCRIPTION/DOCUMENT NUMBER

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QUALITY ASSURANCE (QA) TEST PROCEDURES

Introduction: QA test procedures shall be conducted as part of the fabrication of the Loop Antenna

Assembly as called out on NAVSEA drawing 8628188. The testing involves three tests described herein, Inductance, Continuity and Polarity, which shall be conducted upon satisfaction of certain prerequisites. Testing Part 1 shall be conducted per Table 8 upon satisfaction of prerequisites of Table

5. Testing Part 2 shall be conducted per Table 9 upon satisfaction of the prerequisites of Table 6.

Testing Part 3 shall be conducted per Table 7 upon satisfaction of the prerequisites of Table 10.

Table 5 - Prerequisites to Conducting Testing Part 1 of Table 8

1. Ferrite bars have been epoxied into a square frame.

2. Ferrite square frame is within the Support Block (drawing 8628189)

3. Litz wire has been routed per the drawing

4. Litz wire ends have been cut to the proper length

5. Litz wire ends have been solder/burned in the solder pot

6. Antenna assembly has not been encapsulated

Table 6 - Prerequisites to Conducting Testing Part 2 of Table 9

1. Prerequisites of Table 5 are met

2. Jumper Wires and Litz wires have been connected together

3. Heat shrink has been installed over Jumper Wire to Litz wire connection

4. Jumper Wires have been soldered to the antenna connector

Table 7 - Prerequisites to Conducting Testing Part 3 of Table 10

1. Prerequisites of Table 6 are met

2. Fully assembled antenna assembly is encapsulated

3. Urethane has fully cured

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Table 8 - Tests Required for Testing Part 1

1. Inductance P1 Test

2. Continuity P1 Test

Table 9 - Tests Required for Testing Part 2

1. Inductance P2 Test

2. Continuity P2 Test

3. Polarity P2 Test

Table 10 - Tests Required for Testing Part 3

1. Inductance P3 Test

2. Continuity P3 Test

3. Polarity P3 Test

Inductance P1 Test Procedure

1. Identify the Litz wire ends for the F/A and ATH loops.

2. Connect the Inductance meter test leads to the soldered ends of the Litz wires of the F/A loop.

3. Set the meter test level to its lowest level.

4. Record the meter test level and inductance reading in Table 11 below in the F/A channel column.

5. Increase the test level two times if possible (not to exceed 1 Volt) and repeat step 4.

6. Repeat steps 4 and 5 at least one more time if possible.

7. Move the Inductance meter test leads to the soldered ends of the Litz wires of the ATH loop.

8. Repeat steps 3 through 6, recording the data in the ATH column.

9. Indicate Pass or Fail in Table 11 for the F/A and ATH channels if the measured inductance meets the required tolerance.

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Table 11 - Inductance P1 Test Readings

Loop Channel F/A ATH

Test Level (V)

Measured Inductance (H)

Requirement(H) 680 H < Inductance < 900 H

Pass/Fail?

Continuity P1 Test Procedure

1. Identify the Litz wire ends for the F/A and ATH loops.

2. Connect the resistance meter test leads to the soldered ends of the Litz wires of the F/A loop.

3. Record the resistance reading in Table 12 below in the F/A channel column.

4. Move the resistance meter test leads to the soldered ends of the Litz wires of the ATH loop.

5. Record the resistance reading in Table 12 below in the ATH channel column.

6. Indicate Pass or Fail in Table 12 for the F/A and ATH channels if the measured resistance meets the

Table 12 - Continuity P1 Test - Resistance Readings

Loop Channel F/A ATH

Measured Resistance ()

Requirement () < 0.070

Inductance P2 Test Procedure

1. Identify the F/A and ATH start and Finish pins as described in Table 13 below:

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Table 13 - Antenna Connector Pin Description

F/A Channel ATH Channel

Start Finish Start Finish

Pin 1 Pin 3 Pin 2 Pin 4

2. Insert mating sockets into the F/A Start and Stop pins to provide additional clearance for test lead connections. Do NOT connect anything except mating sockets to the antenna connector’s pins.

3. Connect the Inductance meter test leads to the mating sockets connected to the antenna F/A Start and

Finish pins.

4. Set the meter test level to its lowest level.

5. Record the meter test level and inductance reading in Table 14 below in the F/A channel column.

6. Increase the test two times level if possible (not to exceed 1 Volt) and repeat step 5.

7. Repeat steps 5 and 6 at least one more time if possible.

8. Move the mating sockets with test leads attached to the ATH channel Start and Finish pins.

9. Repeat steps 4 through 7, recording the data in the ATH column.

10. Indicate Pass or Fail in Table 14 for the F/A and ATH channels if the measured inductance meets the required tolerance.

Table 14 - Inductance P2 Test Readings

Loop Channel F/A ATH

Test Level (V)

Measured Inductance (H)

Continuity P2 Test Procedure

1. Identify the F/A and ATH start and Finish pins as described in Table 13.

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2. Insert mating sockets into the F/A Start and Stop pins to provide additional clearance for test lead connections. Do NOT connect anything except mating sockets to the antenna connector’s pins.

3. Connect the resistance meter test leads to the mating sockets connected to the antenna F/A Start and

Finish pins.

4. Record the resistance reading in Table 15 below in the F/A channel column

5. Move the mating sockets with test leads attached to the ATH channel Start and Finish pins.

6. Record the resistance reading in Table 15 below in the ATH column.

7. Indicate Pass or Fail in Table 15 for the F/A and ATH channels if the measured resistance meets the

Table 15 - Continuity P2 Test - Resistance Readings

Measured Resistance ()

Polarity P2 Test Procedure

1. Place the compass at the center of the VLF Loop Antenna Assembly.

2. Connect the 1.5 VDC battery terminals to the F/A start and finish pins as described in the Table 16 for the first of the four compass direction tests.

3. Draw the direction of the compass needle deflection in Table 16 and record the pass/fail determination.

4. Repeat steps 1-3 for the remaining three compass direction tests.

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Table 16 - Pin Settings and Compass Needle Orientation

Pin

No.

Description Battery

Polarity

Required Compass

Needle Direction

Observed Compass

Needle Direction

(relative to FWD)

Required =

Observed? Yes=Pass, No=Fail

1 F/A Start + Loop Antenna

FW

D

Compass

3 F/A Finish -

1 F/A Start - Loop Antenna

FW

3 F/A Finish +

2 ATH Start + Loop Antenna

FW

4 ATH Finish -

2 ATH Start -

Loop Antenna

FW

4 ATH Finish +

Inductance P3 Test Procedure

1. Identify the F/A and ATH start and Finish pins as described in Table 17 below:

Table 17 - Antenna Connector Pin Description

F/A Channel ATH Channel

Start Finish Start Finish

Pin 1 Pin 3 Pin 2 Pin 4

2. Insert mating sockets into the F/A Start and Stop pins to provide additional clearance for test lead connections. Do NOT connect anything except mating sockets to the antenna connector’s pins.

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3. Connect the Inductance meter test leads to the mating sockets connected to the antenna F/A Start and

Finish pins.

4. Set the meter test level to its lowest level.

5. Record the meter test level and inductance reading in Table 18 below in the F/A channel column.

6. Increase the test level two times if possible (not to exceed 1 Volt) and repeat step 5.

7. Repeat steps 5 and 6 at least one more time if possible.

8. Move the mating sockets with test leads attached to the ATH channel Start and Finish pins.

9. Repeat steps 4 through 7, recording the data in the ATH column.

10. Indicate Pass or Fail in Table 18 for the F/A and ATH channels if the measured inductance meets the required tolerance.

Table 18 - Inductance P3 Test Readings

Loop Channel F/A ATH

Test Level (V)

Measured Inductance (H)

Continuity P3 Test Procedure

1. Identify the F/A and ATH start and Finish pins as described in Table 13.

2. Insert mating sockets into the F/A Start and Stop pins to provide additional clearance for test lead connections. Do NOT connect anything except mating sockets to the antenna connector’s pins.

3. Connect the resistance meter test leads to the mating sockets connected to the antenna F/A Start and

Finish pins.

4. Record the resistance reading in Table 19 below in the F/A channel column

5. Move the mating sockets with test leads attached to the ATH channel Start and Finish pins.

6. Record the resistance reading in Table 19 below in the ATH column.

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7. Indicate Pass or Fail in Table 19 for the F/A and ATH channels if the measured resistance meets the

Table 19 - Continuity P3 Test - Resistance Readings

Measured Resistance ()

Polarity P3 Test Procedure

1. Place the compass at the center of the VLF Loop Antenna Assembly.

2. Connect the 1.5 VDC battery terminals to the F/A start and finish pins as described in the Table 20 for the first of the four compass direction tests.

3. Draw the direction of the compass needle deflection in Table 20 and record the pass/fail determination.

4. Repeat steps 1-3 for the remaining three compass direction tests.

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Table 20 - Pin Settings and Compass Needle Orientation

Pin

No.

Description Battery

Polarity

Required Compass

Needle Direction

Observed Compass

Needle Direction

(relative to FWD)

Required =

Observed? Yes=Pass, No=Fail

1 F/A Start + Loop Antenna

FW

3 F/A Finish -

1 F/A Start - Loop Antenna

FW

3 F/A Finish +

2 ATH Start + Loop Antenna

FW

4 ATH Finish -

2 ATH Start -

Loop Antenna

FW

4 ATH Finish +

Notes:

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I certify that I conducted the measurements contained in this test procedure and recorded the actual measurement values and observations.

Print Name: ______________________________

Signature: ______________________________ Date: ____________________

I certify that I witnessed the measurements contained in this test procedure and the recording of the actual measurement values and observations.

Print Name: ______________________________

Signature: ______________________________ Date: ___________________