When installing a Bruker AV (or older) console to an Oxford magnet that has been ran up reverse polarity, the H0 (Z0) circuit polarity must be reversed. On Varian systems, there is a switch, usually on the shim DAC, to do this. On newer Bruker systems, there is a software setting in the Lock section when doing ha. On older systems, it is necessary to re-wire the SCB-R shim cable to reverse the polarity of the H0 Coil.
SCB-R-Connector
Command Function po Pincers Open pc Pincers Close au Arm Up ad Arm Down a1 Inner Ring a2 Outer Ring as Arm to shim mb Magazine Back mf Magazine Fwd mp xx Mag to Position XX tl Test Loop (CONT to quit) ESC? Operation Mode ESC. Diag Mode Switching to Diagnostic Mode In Diagnostic Mode,…
9.3 Communication problems between PC and CCU If the acquisition (zg, gs, wobb) and/or the configuration (cf) fail, you might have a communication problem between the LINUX PC and the spectrometer CCU. Typically you will get error messages from XWIN-NMR like: Connect to spect: unable to connect to remote hostConnection to spect. aqport0, failedAcquisition hardware not present or defect Check the communication between…