American Magnetics 420 Power Supply Programmer - Manual (Page 65)

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Operation
Setup Menu : Load
the 237,21 key to cycle between YES and NO. The default value is
YES.
A user input for external quench detection is provided on the rear
panel of the instrument. The external input overrides the quench
detection function of the Model 420 and cannot be disabled. For
further discussion of the quench detection logic and operation,
please refer to paragraph 3.5.
3.2.2.8 Energy Absorber Present
Indicates whether an energy absorber, such as the AMI Model 610,
is connected to the system. Use the
237,21 key to cycle between
YES and NO. The default value is NO.
It is important for this setting to be correct since the internal gain
tables of the Model 420 compensate for the additional load of the
energy absorber if present. The increased gain when an energy
absorber is present will decrease (but not eliminate) the time
required for the system to “forward bias” the energy absorber.
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