5522A
Operators Manual
6-18
EXTGUARD?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(External guard query) Returns whether the internal guard shields are connected or
disconnected from earth (chasis) ground.
Response: (character) ON (external guard is on, i.e., external)
(character) OFF (external guard is off, i.e., internal)
Example: EXTGUARD? returns ON
FAULT?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Fault query) Returns the first error code contained in the Calibrator error queue, then
remove that error from the queue. After obtaining the error code, use the EXPLAIN?
command to view an explanation. A zero value is returned when the error queue is
empty. To read the entire contents of the error queue, repeat FAULT? until the response
is 0. (Only system errors appear in the error queue.)
Response: <value> of the error code
Example: FAULT? returns 539
Returns the first error code in the error queue, number 539. To view an explanation of the
error, enter the command EXPLAIN? 539.
FORMAT
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Format command) Use with extreme care. Restores the contents of the nonvolatile
memory device to factory defaults. The memory holds calibration constants and setup
parameters. You lose all calibration data permanently. The CALIBRATION switch on
the rear panel of the Calibrator must be set in the ENABLE position or an execution error
occurs, except for FORMAT SETUP.
Parameter: ALL (replaces the whole contents with factory defaults)
CAL (replaces all cal constants with factory defaults)
SETUP (replaces setup parameters with factory defaults)
Example: FORMAT SETUP
Replace the setup parameters with the default setup values (below). (The FORMAT ALL
command is the same as FORMAT CAL and then FORMAT SETUP.) The FORMAT
SETUP command also clears the *PUD string (see the *PUD command) and SRQSTR is
set to “SRQ: %02x %02x %04x %04x” (see the SRQSTR command) and SPLSTR is set
to “SPL: %02x %02x %04x %04x” (see the SPLSTR command).
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