Lake Shore Model 620/622/623/647 Magnet Power Supply User’s ManualOperation 3-1CHAPTER 3OPERATION3.0 GENERALThis chapter covers seven areas: MPS Front Panel (Paragraph 3.1), Power Up (Paragraph 3.2), SettingCurrent on an MPS with Manual PSH Control (Paragraph 3.3), Setting Current with Automatic PSH Control(Paragraph 3.4), Instrument Setup Screens (Paragraph 3.5), Function Menus (Paragraph 3.6), and anAutomatic Persistence Control Example (Paragraph 3.7).Setup the MPS software with the MPS output terminals shorted together as in section 3.2. This ensures thatwhile the user learns MPS operation, an inadvertent keystroke causes no damage to the magnet.3.1 THE MPS FRONT PANELFigure 3.1 below shows the MPS Front Panel. The up or down Display Cursor Control keys move the lineindicator to the line containing a value to be changed. Use either the Data Entry Keypad to enter the desiredvalue or the up or down Numeric Entry keys to increment or decrement the value. The Enter key accepts theupdate, while the Esc key discards the change and returns to the prior value. Move the cursor to a particulardigit with the right and left Display Cursor Control keys and change it with the Numeric Entry keys.7 8 94 5 61 2 30 . +/- EnterEscFunctionMenu NormalDisplayNextMenuCursorLocalRemoteModeOutputInhibitFunctionsPowerFaultPersistentSwitch Heater OFFONMagnet Power SupplyData EntryA B C DIE FHNKLMJGA. Display ScreenB. Display Function KeysC. Display Menu Selection KeysD. Data Entry KeypadE. Escape Key. Restores an old value andreturns from a Function Screen toNormal Screen. Also Aborts a ramp orautomatic process.F. Interface KeysG. Data Entry Up and Down Keys. Increment anddecrement numeric values, Pause/Restartramps, or execute some functions.H. Output Inhibit KeyI. Display Cursor Control KeysJ. Enter Key. Accepts a change.K. Power IndicatorL. Fault IndicatorM. Persistent Switch Heater IndicatorN. Power SwitchFigure 3-1 MPS Front Panel
