Installation – American Magnetics 4Q06125PS-430 High Stability Integrated Power Supply System User Manual

Page 37

Rev. 3

Installation

Power-Up Procedure

12. The system should ramp to 10 A in approximately 10 seconds.

Verify this is the case (if a PSwitch is installed and in the cooled

state, ramp time to 10 A should be slightly less than 2 seconds).

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

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 output current display of the power supply indicates

that it is supplying 10 A to the load (which is only the cabling in

this case).

15. Set the target current to the master current limit value. Refer to

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 supply.

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.

After successful completion of this test, the system is ready for operation

with a superconducting magnet. Refer to the ramping function example

available ramping methods.

1. Not all power supplies have a local current readout.