11August 2003

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DJC Testing at LaTechUpdate

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Quality Control Tests of DJCs

• Continuity and shorts test
• Resistance testing
• High voltage standoff testing.
• LaTech Testing Crew
• Moreshwar Dhole
• Qun Yu
• Matthew Bellot
• Henry Hollins

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Since our last report

• Updated and improved our database to reflect
  changes suggested last time and to include
  results of recent testing
• Received 168 50cm-test cables from Century
• Commenced affixing backings to cables as per
  procedure from Jim Fast
• In parallel, 80 of these have been tested

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• On the following slide are sample data from
  SHEET 1 of the DJC database (http//caps.phys.late
  ch.edu/greenw/run2b/run2b_page.html)

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• Also on the DJC database spreadsheet is SHEET 2
  which has resistance measurements, mean
  resistances and standard deviations. Part of this
  sheet is on the next slide..

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Some Observations

• We have tested 125 Century cables.
• Of these, 10 cables have some type of defect-
  shorts between lines, discontinuity, or high
  resistance. Shorts are the most common of these.

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• END OF REPORT

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• EXTRA SLIDES

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Digital Jumper Cable Readout Setup
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3) High Voltage Standoff Test

• The purpose of this test is to check whether
  there is any short or current leakage (Arcing)
  between HV (High Voltage) Cu trace and other
  adjacent Cu traces.
• For this testing here at LaTech we developed our
  own High Voltage Testing Jig and it is working
  fine.
• This High Voltage Testing Jig allows us to test
  10 cables at a time for overnight.

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Test procedure

• Continuity two multimeter probes are connected
  to both ends of the line in a given cable, if the
  line is good, there will be beep from
  multimeter.
• Short circuit tests each line is tested against
  its nearest neighbor.

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High Voltage Test Schematic
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Complete Test Setup