10.4 Instrument Subsystem
The Instrument subsystem controls the selected phase of the AC power source for
configurations capable of operating in three phase mode.
Subsystem Syntax
INSTrument
:COUPle 1 | 0 Couples or uncouples commands
:NSELect 1 | 2 | 3 Selects phase A, B or C using numeric references
INSTrument:COUPle
This command may be used to couple all output phases in three phase mode. For the
2003RP, this command only applies to the OUTPut:DROP command. When the phases are
coupled, the OUTP:DROP command affects all three phases. This allows the output voltage
to be dropped for all three phases using a single command and without the need to select
each phase individually. When uncoupled, the OUTP:DROP command must be preceded by
the INST:NSEL command and will only affect the selected phase.
Available parameters are 1 to couple all phases and 0 to uncouple all phases.
Command Syntax INSTrument:COUPle
Parameters 1 | 0
Examples INST:COUP 1
Query Syntax INST:COUP?
Returned Parameters <NR1>
Related Commands INST:NSEL OUTP:DROP
INSTrument:NSELect
This command may be used select a specific output phase using a numeric reference. A 1
denotes phase A, a 2 denotes phase B and a 3 denotes Phase C. For the OUTP:DROP
command, the coupling state determines if the phase selection is used. For measurement
commands, the phase selection always applies. Thus, coupling does not affect the operation
of the measurement queries.
This means the instrument can remain in coupled mode while doing measurement queries
using “INST:NSEL <n>;MEAS:VOLT?".
Note that when the instrument is subsequently put in the uncoupled state using “INST:COUP
0”, the last issued phase selection will still be in effect for measurement queries. To make
sure the desired phase is selected, follow the “INST:COUP 0” command with an
“INST:NSEL <n>” command
Command Syntax INSTrument:NSEL
Parameters 1 | 2 | 3
Examples INST:NSEL 1
Query Syntax INST:NSEL?
Returned Parameters <CRD>
Related Commands INST:COUP MEAS
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