American Magnetics 4Q1005PS-430 Integrated Power Supply System - Manual (Page 49)

Rev. 5 31
Operation
Single-key Commands : Target Field Setpoint
3.6.2 Target Field Setpoint Key
Pressing the TARGET FIELD SETPOINT key provides a menu for setting
the target field/current. The target field/current is the field or current to
which the Model 430 Programmer ramps the superconducting magnet
when it is not paused. The target field/current may be set to the lesser of
(1) the Magnet Current Rating, and (2) the Current Limit 1 or equivalent
field (per defined coil constant). The target field/current requires a sign
since it defines a setpoint within the entire field/current range of the
system (positive or negative).
When on the default display, pressing the SHIFT + TARGET FIELD
SETPOINT keys will temporarily display the Magnet Current/Field for
three seconds before reverting to the default display. The value displayed
is as follows:
•When in driven mode, the present current/field will be displayed.
•When in persistent mode, the current/field will be displayed that
was flowing in the magnet at the time persistent switch was
cooled.
3.6.3 Ramp / Pause Key
Pressing the RAMP / PAUSE key toggles the Model 430 Programmer
between the ramping mode and the paused mode. If the RAMP / PAUSE
key is pressed while the Model 430 is ramping, the ramping is paused. If
the RAMP / PAUSE key is pressed while the Model 430 is paused, the
Model 430 continues ramping.
3.6.4 Ramp To Zero Key
Pressing the RAMP TO ZERO key causes the Model 430 Programmer to
immediately begin ramping field/current up or down to zero field/current
at the defined ramp rate(s). Ramping to zero may be interrupted at any
time by pressing the RAMP / PAUSE key, which causes the Model 430
Programmer to enter the PAUSED mode and maintain the field/current
present at the point it was paused.
1. Refer to section 3.10.2.4 on page 52.
+50.00 A - Target Field (kG)
+0.50 Vs +50.000
+0.25 A
P Magnet Current (A)
+0.00 Vs +10.00 A