Contents
H172203_1_001
vii
14.4 System Architecture / Overview......................................................................................151
14.4.1 Protection........................................................................................................................153
14.4.2 Measurements Provided for Diagnostics ........................................................................153
14.4.3 Calibration.......................................................................................................................153
14.4.4 Front Panel - Connectors and LED‘s ..............................................................................154
14.5 Function Description .......................................................................................................156
14.5.1 Liquid Helium Level Measurement..................................................................................156
14.5.2 Analog Liquid Nitrogen Level Measurement (SPB-E only) .............................................157
14.5.3 Sample Down and Sample Up Detection........................................................................157
14.5.4 Version of the Shim Upper Part ......................................................................................157
14.5.5 Sample Changer Interface ..............................................................................................157
14.5.6 Control Output for BSMS/2 Variable Power Supply Board .............................................157
14.5.7 Auxiliary Bus Connector (VT Accessory, SPB-E) ...........................................................159
14.5.8 Pneumatics .....................................................................................................................159
14.6 Bus Interface...................................................................................................................161
14.7 Service ............................................................................................................................161
14.7.1 SPB Service Web ...........................................................................................................162
14.7.2 Diagnostic and Troubleshooting .....................................................................................163
14.8 System Requirements.....................................................................................................165
14.9 Ordering Information .......................................................................................................165
15 VPSB-DC and VPSB-DC-E ............................................................................................................167
15.1 Introduction .....................................................................................................................167
15.2 Configurations.................................................................................................................167
15.3 Technical Data ................................................................................................................168
15.3.1 Technical Data, Environment and Norms .......................................................................168
15.3.2 Electrical Specification VPSB-DC ...................................................................................169
15.3.3 Electrical Specification VPSB-DC-E ...............................................................................169
15.4 System Architecture / Overview......................................................................................171
15.4.1 Control FPGA..................................................................................................................173
15.4.2 Power Supply and Output Power Control .......................................................................173
15.4.3 Protection........................................................................................................................174
15.4.4 Measurements Provided for Diagnostic ..........................................................................174
15.4.5 Calibration.......................................................................................................................174
15.4.6 Front Panel - Connectors and LED‘s ..............................................................................175
15.5 Service ............................................................................................................................177
15.5.1 VPSB-DC(-E) Service Web.............................................................................................177
15.5.2 Diagnostic and Troubleshooting .....................................................................................178
15.5.2.1 Serviceable Fuses ..........................................................................................................178
15.6 System Requirements.....................................................................................................179
15.7 Ordering Information .......................................................................................................179
16 VTA ..................................................................................................................................................181
16.1 Introduction .....................................................................................................................181
16.2 Configurations.................................................................................................................181
16.3 Technical Data ................................................................................................................182
16.4 System Architecture / Overview......................................................................................188
16.4.1 Protection........................................................................................................................189
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