American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 103)

Rev. 5 85
Operation
Ramping Functions Example
2. Press the SHIFT and then the PERSIST. SWITCH
CONTROL key to turn on the persistent switch heater
current. Note that the Model 430 Programmer will enter the
HEATING SWITCH mode and disallow any ramping during
the switch heating period.
3. At the end of the switch heating period, the MAGNET IN
PERSISTENT MODE LED will be turned off and the Model
430 Programmer will be in the PAUSED mode.
3.14 Ramping Functions Example
As an example of ramping to two target field/current settings, refer to
Figure 3-14 below. Each step is labeled as 1 through 8 in Figure 3-14. The
Model 430 Programmer, for the purposes of the example, is assumed to be
in the PAUSED mode at 0 A at the beginning of the ramping example.
Point 1. The current is 0 A and the Model 430 Programmer is in the
PAUSED mode. The user sets the target field/current to -40.000 A. The
RAMP / PAUSE key is pressed so that the PAUSED mode is no longer
active and the Model 430 begins ramping current.
Point 2. The target field/current setting of -40.000 A is achieved and the
Model 430 Programmer switches to HOLDING mode.
Point 3. The user changes the ramp rate setting. The user also sets a new
value of +40.000 A for the target field/current. As soon as the new target
Figure 3-14. Ramping to Two Different Target Field/Current Settings.