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The high voltage for the silicon sensors is supplied by a 16-channel module from Iseg located in an Iseg crate in the hall. It is connected via an USB-CAN interface (small white box with a single red LED) with LBTBXP02.
  • Next to the crate there is a power supply labelled "elind", which provides the front-panel enable, which rather confusingly is labelled "inhibit". It should be set to 2-3V and a small current limit.
  • From the Iseg modules a cable goes to an aluminum patch panel with 15 outputs, labelled 0-14. The last channel is thus absent from the patch panel.
  • The control program can be started in 2 ways: either by clicking on isegCANHVControl on the desktop of LBTBXP02, or by All Programs << isegHVwithCAN << isegCANHVControl. If the window that pops up is empty put the cursor in field EHS02 or EHS03.

Operating the isegCANHVControl:

  • Note that the software treats the 16-channel power supply as two 8-channel modules - the are shown as EHS 02 and EHS 03 on the main panel. If you don't see them, move the mouse cursor into that panel and they should become visible.
  • Click on EHS 02 or EHS 03 to open the daughter-panel that shows individual channels.
  • Vnominal and Inominal mean (hardware ?) maximal !!! What really comes out are the values in Vset and Iset
  • A right-mouse click outside a particular channel gives the possibillity to modify general settings.
  • To select a particular channel left click on its label (or a bit to the right of it) and make sure that channel got selected.
  • After you select a channel right-click it and choose the seeting to be modified.
  • Clicking the lamp icon (top left) gives info about the temperature of the module.
  • Timer << record time << group instruction gives the possibillity to log settings at a desired frequency. Only clicking on the floppy-icon and specifying an outputfile results in a file in Excel-format.
  • This HV power supply should be safe for humans (24 mA is considered dangerous) but remember still that this is HIGH VOLTAGE.
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Topic revision: r4 - 2006-11-03 - unknown
 
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