notes on first test in CERN cleanroom January 20, 2009 06:04:38 PM Generally push and pull rather than twist to shift the 66 pin connectors, take care not to turn the rear cable clamp nut, only turn the main connector shell At rear of agilent connect P2 to S2 and P3 to S3 and connect the long extension cables (2 x -07) to first the test adapter -8 for C1 and then -9 for C2 so the end of the long extension marked B goes to end B and the long extension marked C goes to end C of either the the -8 or the -9 cable C1 and C2 -10 end C to P20 and D to P30 also connect the long extension marked B to -10 end A and long extesion marked C to -10 end B Double click AMStesterv3 and check the agilent displays the remote control message RMT in its display window above the green "SCAN" button. Do not press any Agilent controls at all. Click on Select test logging file, edit the suggested name (TestLog.txt) to a suitable name for the tests to be run and click Save. Click Read Test List confirm your logging file is the name displayed in the confirmation box and select the test file: C1-CDTestList.txt The file title lists the connections to be made at the Agilent end as already described above. Now click Scan - once again confirm the Agilent connections are as listed in the message window that appears and if all is well click OK to start the tests. The test results will flash up as each test is completed and when the test file is finished the Test Status bar will turn from Red to Green Now swap over the ends of the test adapter at the rear of the agilent so that C1 -10 end E to P20 and F to P30. Normally it is preferable to continue to log to the same test log file so now just click Read Test List again so click Yes when asked to confirm the name of the test log file and select C1-EFTestList.txt and click OPEN then Scan. The title displayed in the Test File confirms the connection arrangement at the rear of the Agilent and click Scan and OK to the prompt to check the connections for the test. Now move the long extensions to connector C2 and repeat the process but start with ends E and F at the rear of the Agilent to avoid re-plugging on the next test, so this time select the test file C2-EFTestList.txt. When this completes re-connect at the rear of the agilent so -10 end C to P20 and D to P30. Now select the test list C2-CDTestList.txt and Scan once more. C3 and C4 -11 (-08 to C3 and -09 to C4) C3-CDTestList.txt - OK Note the Ground ref has a leakage warning however this is because the magnet has a large capacitance to ground and this is still drawing current from the ohm measuruement terminals and is interpreted as a leakage resistance, the warning can be ignrored as the subsequent slow discharge shown in the five following voltages confirms. C3-EFTestList.txt - OK C4-EFTestList.txt - !!WRONG!!, FORGOT TO SWAP OVER TO C4 !! Repeated after swap!... - OK C4-CDTestList.txt - OK, Note the ground ref leakage warning of 568K is perfectly correct as this connector contains 2 separate ground references and the one not under test is commoned to the scanner ground reference resulting in an apparrent ground leakage. However the in shipping crate log had resistance of aroound 479k and the change needs to be understood (from memory the previous tests had results closer to the ones taken today though and the in shipping crate test was unusually low). -08 to C5 -09 to C8 C5 -12 above C8 C5-CDTestList.txt - OK C5-EFTestList.txt - Some resistances are a few tens of ohm different from the in shipping crate list, could this be due to the very high leg resistances of the 4-wire measurements? - This needs investigating if time however all the connections are clearly there so it may be best to just keep this under review... C8 -15 below C5 use C8-CDTestList.txt - OK C6 -13 top above C7 and C30/31 C6-CDTestList.txt (-08 to C6 and -09 to C7) - ok C7 -14 below C6 - ok C7-CDTestList.txt C7-EFTestList.txt Magnet voltage taps C30+C31 - have to be within 3 ft of C30/C31 or make up 2 more long extensions -08 to C30 (Z+ end) -09 to C31 (Z- end) Also a convenient time to do a leakage check - use some pins on end B of -08 - I used 6 and 30 one as a ground check after the reading stabilised and one as the + to the PSU in series with a DVM BUT apply the leakage check between one of the above and the connector shell - read leakage as a voltage division (used Delta SM7020-D PSU). Voltage on My Fluke 77 drops steadily to 134mV and then continues to drop gradually. Increases to more than 2V when I touch pin 30 and recovers again gradually. It was at 77mV and still dropping when I finished monitoring about 5 minutes later. C30+c31 continuity scan - plug ABCD of -16 to BC-08 BC-09 rspy end E to AGI P20 and F to AGI P30 also AGI S2-P2 S3-P3 select C30-31ContinuityTest4List.txt - ok selct C30-31ContinuityTest6List.txt and add P4 short - OK Voltage cascade apply 10V with 10ma current limit to 2 red wrt to 2 black wires from the rear of SCD2320-17 end A and select the test file C30-31CascadeTestList.txt NBNB need to plug into P2 and P5!!!! removing connections to S20 and S30. 1.8mA drawn - dont plug in P4 either! Diagrams of each test set up would be really helpful, particularly for the tests involving the PSU!