typically several Henries, it can take a very long time to discharge
a magnet without an energy absorber. For energy absorber
installation, refer to its reference manual.
6. Ensure the power supply and programmer are unplugged and power switches are in the
OFF position.
WARNING:
Superconducting magnets can produce and
extremely large inductive voltages that can be dangerous and
potentially fatal. Ensure that all magnets are completely
discharged and all power supplies deenergized before making or
breaking any electrical connection.
7. Connect the magnet power leads from the energy absorber (or directly from the power
supply if the system does not contain an energy absorber) to the magnet's vapor cooled
current lead connection points.
8. Locate the current shunt leads terminated in banana plugs from the energy absorber (or
power supply if the system does not have an energy absorber) and connect to the jacks
marked CURRENT SHUNT INPUT on the rear panel of the programmer. Ensure proper
polarity by plugging red-to-red and black-to-blue.
9. Locate the leads marked PROGRAM OUT and COMMON from the power supply.
Connect these into the appropriately marked plugs on the rear panel of the programmer.
NOTE:
If using a Hewlett Packard power supply with the
programmer, ensure the COMMON lead contains a 750
Ω
resistor
in series with the lead. Refer to the power supply manual.
10. Locate the magnet voltage tap leads (blue and yellow) and connect to the terminal strip in
the programmer rear panel marked MAGNET VOLTAGE INPUT. Connect blue to
positive and yellow to negative (Model 411 and 412 only).
11. Locate the wires on the magnet from the persistent switch heater and connect them to the
terminals marked PERSISTENT SWITCH HEATER CURRENT on the rear panel of the
programmer (red to positive and black to negative) [Model 412 only].
12. Connect an appropriate computer interface to the rear panel computer control connector
J5. Two analog inputs and one analog output minimum is required for computer
operation (optional). A pin out of the 25 pin D-connector appears in Figure 6.
13. Connect the programmer and power supply to appropriate AC power sources.
Ensure the programmer line cord and the power supply are plugged into the
appropriate voltage source. The
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