User guide

26 Rev. 5
Operation
Fine Adjust Knob Operation
asterisk (*) indicating that numeric entry is active. An example of a
numeric entry in progress (numeric entry active) is illustrated below:
Once the numeric value has been entered, press the
ENTER key to accept
the numeric value. Values are not applied to the operation of the Model
430 Programmer until the
ENTER key is pressed and the asterisk
disappears from the display. Attempts to set a parameter to a value
outside of the valid range are ignored, and if attempted the Model 430
Programmer will beep once indicating an error and revert to the previous
setting.
If the
ESC key is pressed while numeric entry is active and digits have
been entered, the entered digits will be cleared and the cursor will remain
for reentry of a new desired value. If the
ESC key is pressed with no
entered digits on the display, the setting will revert to the previous value
and numeric entry will be made inactive. Thus, if digits have been entered,
the first time
ESC is pressed, the entered digits are cleared, but numeric
entry remains active; if
ESC is then pressed again (with no entered digits
displayed), the setting reverts to its previous value and numeric entry is
made inactive. Note that if the
ESC key is pressed when numeric entry is
not active, the current submenu will be exited and the next higher level
submenu will be entered.
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
+50.00 A - Target Current (A)*
+0.50 Vs +74_