Agilent Technologies E7002, Справочное руководство

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12 E7002, E7012, and E7014 Emergency Discharge Unit
2
Description and Specification
Description
Features
• Magnet quench indication
• Indication that the discharge button has been operated
• Remote emergency discharge button option
• Battery back up
• Heater and battery test facility
• E7012 manually operated B0 coil dump
Description
The principle function of the E70XX emergency discharge
unit (EDU) is to initiate a ‘quench’ in order to run down a
superconducting magnet in case of any emergency. This is
achieved by passing current through a heater built into the
magnet windings. A mains derived dc voltage drives the
current into the heater. The unit is also battery backed to
ensure operation during a power failure.
A test facility is provided to check the condition of the
battery and the integrity of the heater circuit.
A further optional facility is a manual output current that is
used to energize the B0 shield switch heater, which lets the
fluxes within the B0 coil decay.
See Also For more information, see “Operation and Testing” on
page 15.