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Message ID: 2627     Entry time: Wed Feb 3 12:45:25 2021
Author: aaron 
Type: DailyProgress 
Category: PSOMA 
Subject: strain relieved connectors 

Enter Wed Feb 3 12:34:12 2021

Set up computing environment on spirou. Conda isn't updating

Replacing cable connectors for DC power in PSOMA rack -- existing cables are not strain relieved.

  1. turn of laser current and TEC drives. Power off rack electronics requiring DC power.
  2. remove cables. Locate appropriate connector parts and crimper from EE
  3. Remove housing
  4. Cut the old connector such that there's some insulation remaining to help keep track of pin mapping
  5. Check that the new length has the rubber strain relief fitting into the housing around the fat, outer insulation -- not the interior wire insulation.
  6. Strip the ends of the conductors to the required length for the pins, and crimp on a new pin. Use the right crimper for the wire gauge.
  7. Insert the pins into the connector panel, and close up the housing.
  8. After completion, check that the pin mapping remains the same with a multimeter. Success rate today was an abysmal 50%, cables in need of repair on the workbench.

Before (1) and after (2, opposite cardinality) shots of the open housing attached.

Wed Feb 3 18:30:36 2021

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