American Magnetics 05200PS-430-601 Integrated Power Supply System - Manual (Page 39)

Rev. 5 21
Installation
Power-Up Procedure
Note
With an energy absorber unit is connected, the Model 430
Programmer may take significantly longer to ramp the current to 10
A. The Model 430 must first develop a supply output voltage to
overcome the forward voltage drop of a connected energy absorber.
During actual magnet operation, the presence of an energy absorber
will not significantly delay the ramping operation since the Model
430 control gain is increased by orders of magnitude when an
inductive load is connected (unless stability setting is 100%).
13. When the target current is achieved, the FIELD AT TARGET LED
will be illuminated. The display should show “
+10.00 A -
”
indicating that the Model 430 Programmer is in the holding mode
at the target current value (+10.00 A).
Note
There may be a discrepancy between the current shown on the power
supply display 1 and the current displayed on the Model 430
Programmer. The current measurement system incorporated in the
Model 430 is more accurate than the power supply shunt.
14. Verify that the power supply output current displays indicate that
a total of approximately 10 A is being supplied to the load (which is
only the cabling in this case).
15. Set the target current to the Current Limit value. Refer to section
3.10.2.4 on page 54 to determine the Current Limit value. After the
new target current value is entered, the Model 430 Programmer
should ramp automatically to the new setting.
16. When the new target current value is reached, the power supply
current display (if provided) should also indicate the new value.
17. Press the RAMP TO ZERO key to ramp the system to zero current.
18. Perform remote control software checkout as required.
19. Turn off the power supplies.
20. Reset the stability setting and ramp rate of the Model 430
Programmer to an appropriate value for the magnet to be operated.
Then turn off the Model 430.
21. Remove the short from the power supply leads and connect the
leads to the magnet current leads of the magnet.
1. Not all power supplies have a local current readout.