American Magnetics 05500PS-430-601 High Stability Integrated Power Supply System - Manual (Page 113)

Rev. 5 95
Operation
External Rampdown : External Rampdown while in Persistent Mode
1. The Model 430 Programmer first ramps the power supply to the
magnet current.
2. Once the power supply is at the magnet current, the FIELD AT
TARGET LED will light and the unit will momentarily “hold”:
3. Following a short “hold”, the persistent switch will be heated to
place the power supply in control of magnet current:
4. After heating (turning off) the persistent switch, the MAGNET IN
PERSISTENT MODE LED extinguishes, and rampdown begins.
The FIELD AT TARGET LED extinguishes.
5. After rampdown, the following will display:
Note
The external rampdown signal MUST be cleared before pressing
ENTER will yield a response. Further operator control is inhibited
until the external rampdown signal is cleared.
6. Once the external signal has been cleared, ENTER can be pressed.
User control will be re-established and the operator can continue
+3.92 A
 Mode: Ramping
+0.17 Vs PSwitch Heater: OFF
+50.00 A - Mode: Holding
+2.11 Vs PSwitch Heater: OFF
+50.00 A Mode: Heating Switch (4)
+2.11 Vs PSwitch Heater: ON
+48.85 A
 Mode: Zeroing Current
+1.89 Vs PSwitch Heater: ON
+0.00 A - Ext. Rampdown completed
-0.00 Vs Press ENTER to continue