American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 97)

Rev. 5 79
Operation
Persistent Switch Control : Entering Persistent Mode
2. The Model 430 Programmer must be in either the HOLDING or
PAUSED mode at the target field or current.
3. The Model 430 Programmer must be at the default field/current
display.
1
4. Press the PERSIST. SWITCH CONTROL key to turn off the
persistent switch heater current and automatically ramp the power
supply to zero current:
a. After the PERSIST. SWITCH CONTROL key is pressed, the
Model 430 Programmer requests that the ENTER key be
pressed as a confirmation that the magnet should be placed in
persistent mode. 2
b. When ENTER is pressed, the persistent switch is cooled for the
preset persistent switch cooling time (set by the PSwitch Cooled
Time variable 3 ). The display indicates that the persistent
switch is being cooled and indicates the number of seconds (4 in
this example) remaining in the cooling cycle.
c. When the cooled time is complete, the green MAGNET IN
PERSISTENT MODE LED will illuminate 4 and the power
supply will ramp to zero at the PSw P/S Ramp Rate value 5 .
1. Refer to section 3.2.1 on page 23.
2. Pressing the
ESC
ape key will terminate the command and return the Model 430
Programmer to the default screen.
3. Refer to section 3.10.2.10 on page 56.
4. The threshold for this LED is 100 mA of magnet current.
5. Refer to section 3.10.2.11 on page 56.
+50.00 A - Press ENTER to begin
+3.50 Vs Persistent Mode
+50.00 A Mode: Cooling Switch (4)
+3.50 Vs PSwitch Heater: OFF
+42.89 A Mode: Power Supply ramping
+3.38 Vs to zero current