TOFp System Procedure:
pVPD Low Voltage Systems Adjustment

This is the procedure to modify the Low Voltages provided to pVPD East (1 FEE board), and to pVPD West (1 FEE board). Low Voltage powers the on-detector FEE boards, and parasitically, the on-detector Threshold Interface Board.
   Related Documentation:
  1. TOFp Glossary
  2. TOFp Rack map
  3. Module Full List
  1. Notification and Approval of TOFp Group.
  2. Access to WAH.
  1. Note that voltage settings at the power supplies exceed +5V and -5.2V respectively, due to the voltage drop along the LV Bus cables.

  2. Locate the BK Digital Power Supply in Rack 1B-2. Use the TOFp Rack map to see where it is if necessary.
  3. Read the Front Panel digital display and adjust the two voltage settings in Volts as necessary.
  4. Read the Front Panel digital display and record the two new voltage settings in Volts and the two new current draws in Amperes.
  5. Copy the new voltages and current draws to the Shift Log Book.
  1. Contact TOFp Control to inform that procedure is complete, and with any end-of-procedure comments that are necessary.
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