American Magnetics 420 Power Supply Programmer - Manual (Page 76)

58 Rev. 7
Operation
Ramping Functions Example
Point 7. The operator increases the ramp rate and presses the 5(6(7
=(52 key to begin ramping to zero current. The Model 420 automatically
ramps the current to 0 A.
Point 8. The Model 420 holds the operating current of 0 A when achieved
until the
5(6(7=(52 key is deactivated.