American Magnetics 4Q1005PS-430 Integrated Power Supply System - Manual (Page 38)

20 Rev. 5
Installation
Power-Up Procedure
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 display indicates 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 52 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 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
presented in section 3.14 on page 85 for a discussion of the various
available ramping methods.
1. Not all power supplies have a local current readout.