Sheila and I followed T2200048 to check for ground loops in the SQZ rack yesterday while the HAM7 door was being put back on. Did not check picos. Results attached.

Strange ones noted below: 

• ISC_SQ_479 and ISC_SQ_480 have pins 13 and 23 connected 
• ISC_SQ_483, ISC_SQ_303 and ISC_SQ_481 have pin 13 and rack ground connected 
• ISC SQ 483 and ISC_SQ_484 have 1-3 connected to 14-16 and connection pairs in 7-20, 8-21, 9-22, 10-23, 11-24, 12-25.
• ISC_SQ_305 DCPDS has connection pairs in 11-24, 12-25.
• ISC_SQ_303  and 305 sometimes beeped as if connected but wasn't repeatable, as if there a capacitor or similar discharging.