American Magnetics 4Q06125PS-430 Integrated Power Supply System - Manual (Page 45)

Rev. 5 27
Operation
Entering Picklist Values
• PSw P/S Ramp Rate if PSwitch is fully cooled. Disallowed during
switch heating/cooling transition.
• PSwitch Current
• PSwitch Heated Time
• PSwitch Cooled Time
• PSwitch Cooling Gain
• Quench Rate
Instead of entering a value using the numeric keypad, SHIFT is pressed,
followed by FINE ADJUST . The display will show an up/down arrow ( )
indicating that the fine adjust knob is active.
When the fine adjust knob is live, adjustments made using it take place
immediately. This is a very useful and powerful functionality. Any
numeric value can be incrementally adjusted using the fine adjust knob,
and its affect on the system can be observed as the adjustment is being
made. For example, with the persistent switch heater on, the persistent
switch heater current can be adjusted incrementally to find the persistent
switch heater superconducting/normal thresholds. An example of a fine
adjust in progress (fine adjust knob is live) is illustrated below:
Note
The fine adjust knob is velocity-sensitive, meaning that the faster the
knob is turned, the more coarse the adjustment. Slow manipulation
of the knob will yield very fine resolution even beyond that displayed
by the Model 430 Programmer.
When the desired numeric value has been set using the fine adjust knob,
the ENTER key is pressed to store the value. Pressing the ESC key while
the fine adjust knob is live will cause the adjusted value to revert to its
previous setting and make the fine adjust knob inactive. In fact, pressing
any key other than ENTER will cause the adjusted value to revert to its
previous setting and make the fine adjust knob inactive.
3.5 Entering Picklist Values
Some submenu items require the user to select a value from a list of
predefined values (picklist values). Such menus will display an item
selector ( ) which points to the picklist value currently selected. To
change the value to another value in the picklist, first press the ENTER
+50.00 A - PSwitch Current (mA)
+0.50 Vs 46.7