American Magnetics 4Q12125PS-430 High Stability Integrated Power Supply System - Manual (Page 50)

32 Rev. 5
Operation
Shift Key Commands
Note
If the RAMP TO ZERO function is PAUSED and then the RAMP /
PAUSE button is pressed a second time, the Model 430 Programmer
will begin ramping to the target field, not to zero. If it is desired to
ramp to zero after the RAMP / PAUSE button is pressed, press the
RAMP TO ZERO button again to continue ramping to zero from the
paused state.
Note
If the magnet is persistent (persistent switch heater is not energized)
when the RAMP TO ZERO key is pressed, the Model 430
Programmer ramps the power supply current to zero; the magnet
current will remain constant since the magnet is in persistent mode.
3.7 SHIFT-key Commands / Menus
The most commonly used commands and menus (other than ramping
controls) are accessed using the SHIFT key followed by a numeric keypad
key. Use of the specific SHIFT-key commands and menus is described in
sections specific to the functionality of that specific SHIFT-key. In general,
a SHIFT-key command is executed or SHIFT-key menu is accessed by first
pressing the SHIFT key (which turns on the SHIFT LED), and then
pressing 1 one of the keys of the numeric keypad ( 0 through 9 , “ . ”, or “ +/- ”).
The SHIFT-key command / menu for each key of the numeric keypad is
shown in light blue text at the top of each key. To access the voltage limit
1. Note the SHIFT key and the following keypad key-press are sequential, not simulta-
neous.
Figure 3-5. SHIFT-Key Functions