American Magnetics 03300PS-430-601 High Stability Integrated Power Supply System - Manual (Page 161)

Rev. 5 143
Service
Troubleshooting Hints
5.2.5 The power supply system will not charge the magnet.
1. Verify system interconnecting wiring. Refer to section 2.5. If the
Model 430 Programmer shows “+0.00 A ↑ Status: Ramping” with
the supply voltage, Vs, increasing or at the programmed Voltage
Limit (as indicated by the reverse video “V” status indicator), there
may be a problem with the power supply. Verify the power supply is
on and the program out connection from the Model 430
Programmer to the program voltage input to the power supply is
intact.
2. Verify the power supply is configured for remote programming,
voltage-to-voltage mode.
3. Check the system wiring and verify that the current flow direction
through the Model 601 is from the positive (+) to the negative (-)
lug.
4. Verify that the supplied external DC power converter is connected
to the rear of the Model 601, and the AC power cord is also
connected to the appropriate power receptacle.
5. Check the Voltage Limit settings of the Model 430 Power Supply
Programmer and verify the limits are set to a value greater than 5
volts plus the charging voltage and any power lead voltage drops.
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.
Note
If an energy absorber is present in the system, the Model 430
Programmer must command enough power supply voltage to
overcome any forward voltage drop due to the energy absorber.
Increase the Voltage Limit to account for the energy absorber voltage
drop.
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