American Magnetics 03300PS-430-601 High Stability Integrated Power Supply System - Manual (Page 49)

Rev. 5 31
Operation
Fine Adjust Knob Operation
3.4 Using Fine Adjust Knob to Adjust Numeric Values
For menu items requiring entry of a numeric value, the value may
alternatively be adjusted with the front panel fine adjust knob. These
menu items include:
• Target Field Setpoint (in holding mode or while ramping)
• Voltage Limit
• Ramp Rate (if there is no PSwitch or if PSwitch is fully heated).
Disallowed during switch heating/cooling transition.
• Custom Supply Menu (Min Output Voltage, Max Output Voltage,
Min Output Current, Max Output Current)
• Stability
• Coil Constant
• Current Limit
• Magnet Current Rating
• 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:
+50.00 A - PSwitch Current (mA)
+0.50 Vs 46.7