American Magnetics 420 Power Supply Programmer - Manual (Page 107)

Rev. 7 89
Remote Interface Reference
Quench State Control and Queries
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VOLTage:PSwitch?
Returns the persistent switch heater voltage measurement in volts. A
value of 0 V indicates a shorted connection. A value exceeding 17 V
indicates an open connection.
4.5.7 Quench State Control and Queries
The QUench commands control and query the quench state of the Model
420. For further information regarding the quench detection functions, see
paragraph 3.5 on page 61.
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QUench {0|1}
Clears or sets the quenched state. Sending a “0” clears any quench
condition (equivalent to pressing the
5(6(7=(52 front panel switch).
Send a “1” sets a quench condition. Setting the quench state to “1” is
equivalent to a quench detection by the instrument, i.e. the power supply
output is forced to 0 V, the quench output of the rear panel connector J4 is
asserted, and all ramping functions are disabled.
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QUench?
Queries the quench state. If a “0” is returned, no quench condition exists.
If a “1” is returned, a quench detect has occurred and is still in effect.