Best Practices Bulletin (ETA) International Electronics Technicians Association … Courtesy Brian Teague Product Manager Sticklers

1/26/16

Courtesy of Brian Teague and Microcare

MIL-DTL-38999 Connector Cleaning and Sources of Contamination

 

Reason for cleaning connectors

  • Mating dirty connectors might cause scratching and/or pitting ruining termini endfaces
  • Cleaning both endfaces before mating will extend the service life and ensure reliable data transmission

Some Common Sources of Contamination

  • Wear debris that moving parts generate when connectors are mated and unmated
  • Debris attracted by the electrostatic charge generated from friction of a dry cleaning processes
  • Cross contaminated alcohol that has been diluted from atmospheric moisture, lint from paper based wipes, or the broken cellular structure of foam tipped sticks

*Image of a dust contaminated endface courtesy of Promet Optics


Case for Using Sticks and Cleaning Fluid

1. Cleaning Performance

  • The use of a cleaning fluid will break up heavy oils and residue contamination
  • The strands in the cleaning stick tip create a capillary action, which wicks up contamination from the endface

2. Elimination of the Ferrule and Socket Electrostatic Charge

  • Cleaning fluid is a dissipative medium that eliminates the electrostatic charge on the ferrule
  • Cleaning with a moistened cleaning stick does not create an electrostatic charge during the wiping process
  • The cleaning stick’s tip makes contact with the socket wall of MIL-PRF-29504/5 termini during the rotation process which dissipates the electrostatic charge
  • Using the cleaning fluid will ensure compliance to IPC 8497-1 Sect 10

3. Largest Effective Cleaning Region

  • The cleaning stick’s tip diameter is able to reach contamination that resides in the outer regions of the ferrule endface
  • Removing contamination from endface periphery significantly reduces particle migration

Limitations of Mechanical Cleaners

  • Dry wiping with a mechanical cleaner generates an electrostatic charge from the contact friction between the cleaner’s cleaning strands flowing across the ferrule endface
  • Wet-dry cleaning with a mechanical cleaner is ineffective because the cleaning strand wicks up on both sides of the cleaning strand requiring multiple engages
  • The cleaning tip outer diameter is reduced to prevent contact with socket walls that would interfere with the cleaning strand flow
  • The effective region for current cleaners is limited to < Ø0.6mm for Ø1.6mm terminus

Recommended Sticklers Products

 

MCC P/N: S16

MIL T 29504/5 for MIL DTL 38999, MIL T 29504/15 for MIL PRF 28876, SMPTE 304M socket termini, ODC-style socket termini, and other hardened connector systems with 1.6mm & 2.0mm socket termini.

Read More Visit CleanStixxs

MCC P/N: P25
NSN 6070-01-553-2258
Recessed cleaning tip in handle enable cleaning of the periphery of 29504/4 pin termini
Read More Visit CleanStixxs

 

MCC P/N: POC03M
NSN 6850-01-592-9391
Non flammable, non aerosol precision cleaning fluid in hermitically sealed 3oz air ship safe steel can
Read More Visit POC03M Cleaning Fluid

 


Recommended Cleaning Process

MIL-PRF-29504/5 Termini – MIL-DTL-38999

 

Applicable Products

  • MCC P/N POC03M
    Fiber Optic Splice & Connector Cleaner cleaning fluid
  • MCC P/N S16
    1.6mm CLEANSTIXX cleaning sticks

 

For Best Results

  • Angle cleaning fluid can and gently engage pump
  • Moisten stick taking care not to over saturate
  • Rotate stick in same direction 6X to 8X
  • Use stick once to avoid accidental cross contamination
  • To minimize foreign object damage (FOD) risk, work with a single sleeve with 10 sticks

 


MIL-PRF-29504/4 Termini – MIL-DTL-38999

Applicable Products

  • MCC P/N POC03M
    Fiber Optic Splice & Connector Cleaner cleaning fluid
  • MCC P/N P25
    Pin CLEANSTIXX cleaning sticks

 

For Best Results

  • Angle cleaning fluid can and gently engage pump
  • Moisten stick taking care not to over saturate
  • Rotate stick in same direction 6X to 8X
  • Use stick once to avoid accidental cross contamination
  • To minimize foreign object damage (FOD) risk, work with a single sleeve with 10 sticks

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