How to start HV GUIs:

       1) log on as cvxwrks@cdaql4
       2) cd $EPHHV (for HMS HVs) or cd $EPSHV (for SOS HVs)
       3) cd tk
       4) type: ./hv.tcl and the HV GUI will come up:

                    
       5) click on Group and select the desired detector HVs