American Magnetics 4Q1010PS-430 Integrated Power Supply System - Manual (Page 157)

Rev. 5 139
Service
Troubleshooting Hints
2. Verify the power supply is configured for remote programming,
voltage-to-voltage mode.
5.2.6 Cannot charge the magnet at the selected ramp rate.
1. Ensure the Model 430 Programmer is properly configured for the
connected power supply. See section 3.10.1.
2. Ensure that the persistent switch heater is on and the switch
heated time has expired. Ramping is disabled during the switch
heating period.
3. Check the value of the Voltage Limit. Refer to section 3.7.2.
4. Check for excessive wiring resistances in the magnet-power supply
loop which may prevent proper charge/discharge voltages at the
magnet. Use the local voltmeter on the power supply to see if the
proper voltages exist across the various components in the magnet
power loop. Loose or oxidized interconnections often exhibit
excessive resistances.
5.2.7 Cannot discharge the magnet at the selected ramp rate
1. Ensure that the persistent switch heater is on and the switch
heated time has expired. Ramping is disabled during the switch
heating period.
2. Check the value of the Voltage Limit. Refer to section 3.7.2.
5.2.8 Cannot charge the magnet to desired field.
3. Ensure the voltage and current adjust controls on the front of the
power supplies are in their fully clockwise position.
4. Ensure that the Model 430 Programmer supply setup submenu is
configured to match the connected power supply, e.g. check that the
Model 430 Programmer is configured for the proper voltage-to-
voltage programming range according to section 3.10.1.1.1.5.
5.2.9 Current in only one direction from 4-quadrant supply
1. Ensure the Model 430 Programmer is configured to allow negative
power supply voltage according to section 3.10.1.1.1.1 and negative
power supply currents according to section 3.10.1.1.1.3.
2. Verify that the Model 430 Programmer is configured for the proper
voltage-to-voltage programming range according to section
3.10.1.1.1.5.