4.2 - Initial Operational Testing – Local Mode
Once the Power Supply, Reversal Switch and Electromagnet system are connected it is time to
perform initial system operational checks.
Start by switching on the Reversal Switch. The power indicator should illuminate, along with
the panel meters, the power supply enable and the polarity indicator as selected by the polarity
control. All interlock indicators should show green.
Temporally disconnect the Magnet Interlock connector from the Reversal Switch. The ‘Magnet
Temp’ and ‘Magnet Flow’ interlock indicators should illuminate red signifying a problem with
the magnet interlocks. Re-connect the Magnet Interlock connector. The interlock indicators on
the front panel should change to green.
Insure that the ‘Voltage’ and ‘Current’ controls on the DC Supply are turned down to their
minimum values and switch on the DC Power Supply. Slowly turn up the voltage and current
controls until about 5 amps is indicated on the DC Supply display. The panel meters on the
Reversal Switch should show similar values for voltage and current.
It is important to note that for normal operation, the DC Power Supply voltage be
set at Maximum. If this is not done, the DC Power Supply will be voltage limited
and full output current may not be achieved.
4.3 - External Control
To use the external control option, set the ‘Control Mode’ switch on the rear panel to ‘External’.
This disconnects the internal DAC and connects the DC Supply Current Input terminal to the
analog input. One thing to note is that it is still possible to use the internal DAQPad for
monitoring the Reversal switch even when using an external analog control signal.
Connect an analog voltage source to the Analog Input terminal. This source should be capable
of delivering voltages from 0V to +10V. The power supply current output is proportional to the
analog control input voltage.
4.4 - Computer Control
The 5971-160 is provided with a LabVIEW driver that allows basic control and monitoring of
the Reversal Switch and DC Power Supply. To use the external control option, set the ‘Control
Mode’ switch on the rear panel to ‘Internal’. This connects the internal DAC to the DC Power
Supply analog control input.
Start up the computer software and ensure that everything configured correctly. Please refer to
section 5 of this manual for more information.