Last Updated on Monday, July 23, 2001 at 16:14:36. by Author: Don Barton

Magnet, Expert Information/Help

(General)

Contents

• Regulator Output Voltage
• Ripple Sensor
• Magnet Pet page on RHIC X-term
• How to contact author

Regulator Output Voltage

Following table gives the Regulator Output Voltage as a function of  'SetPoint' Setting:

Magnet Pet page on RHIC X-term

This page is now available from the diagnostics menu of the PHOBOS Magnet Control program.

Description of the Magnet PET page

PET pages in general have a few 'quirks' to them. One of them is that in order to select an item, you first left-click (e.g. use the left most button on the mouse) on the cell with the mouse, type the value or select the value from a pull-down menu and then confirm the value by middle-clicking on the same cell. The last item is especially important for the fields labeled 'Ctrl' and 'DO RAMP'. No action will be taken by the system until you middle-click on the cell.

Blue text in the picture are labels, text on yellow background are values that can be changed, text on light-gray background are values read back by the system that can change, values on dark-Grey background are readback values that will not change.

If you cannot read the whole string under 'Status' (it is sometimes cutoff), click in the cell and press the '^=' ('Ctrl' and '=' keys simultaneously) to expand the cell

Keep in mind that many of the values from the PET page are duplicated on the Labview screen of one of the slow-controls computers.

Magnet is 'Off', but also reads 'Fault' or 'Component Fault'. Should I worry?

No. The most important thing is that the magnet is 'Off'. The 'Fault' and 'Component Fault' error messages show up because the 'Air Flow' interlock fires (because the magnet is off). This message is confusing, but nothing to worry about.

Magnet has a voltage of 3000V! Should I worry?

No, don't worry the system is not at 3000V (the maximum voltage that the PS can deliver is ~115V). Make sure that the 'Mode' on the line 'wfg.phobosMagnet-ps' is set to 'A' and not 'B'. If you ever read back a 'Volts M' of 3000V, change the 'Mode' back from 'B' to 'A'.  The voltage readout unfortunately shares the same readback channel with some other (engineering) readout. The RHIC engineers  sometimes set the 'Mode' to 'B' and forget to set it back to 'A' afterwards.

Ripple Sensor

N/A yet.