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Cold Probe Preamp Testing
BydonfrankCryo-driver DC condition: 1. Put system into tune mode. 2. Remove cable from pre amp input J5331, and install a BNC “T” in place. 3. Connect one end of “T” to voltmeter to measure Voltage, leave other end of “T” open. Measure voltage at J5331 (voltage should = 5.0V +/- .1V). 4. Connect 50 ohm load on “T”, measure…
vxWorks PPC
BydonfrankConsoles with a PPC may not boot up because the bootfile in /etc/bootptab is VxWorks, and not vxWorksPPC. Change this. Also, change the bootfile in /vnmr/acq/bootptab to vxWorksPPC or a subsequent setacq will overwrite the bootfile name. The PPC should have the bootfile (vxWorksPPC) in nvram, and on boot, the console requests the bootfile. The…
SMS – Reverse Trays
BydonfrankIf you need to reverse the trays, CP31 for CP32, you must also train the rack position CP31:CLEAR. (9) Define Rack CP31:CLEAR (M)ove
acq Debug
BydonfrankThe closest thing there is is the np checklist. The one other thing that may give you a clue as to the culprit if the problem is reproducible, is to run debug. You will need to set up mini com. In a terminal window, cd script filename start minicom In the VnmrJ command line, type…
Massflow Adjustment
BydonfrankAdjusting Mass Flow on a Varian Cryo Platform. Gas Regulator Tuning Procedure (MK1) With the CCC cold and operating at equilibrium (running at least 3 hours), the gas regulator valve should quickly be closed to finger tight and then opened 5 turns. The vernier needle valve on the inlet side of the cold loop should…
Settings for dof during pwxcal
BydonfrankSettings for dof during pwxcal