AMETEK BPS Series Programming Manual - Manual (Page 159)

BPS / MX / RS Series SCPI Programming Manual AMETEK Programmable Power
Manual P/N 7003-961 Rev. AA 159
6.6.5 Simultaneous Output Phase Measurements
You can return simultaneous measurements from all output phases of the source in the
three phase mode using the FETCh query. Unlike MEASure queries, FETCh queries do not
trigger the acquisition of new data when they are executed. First, you must initiate the
measurement trigger system and generate a measurement trigger as explained in the
following section "Triggering Measurements". When the measurement data has been
acquired by the voltage and current data buffers for each output phase, use
INSTrument:NSELect to select each phase, and FETCh to return the specified
measurement data. The following commands return rms voltage:
INSTrument:NSELect 1
FETCh:VOLTage:AC?;*WAI
INSTrument:NSELect 2
FETCh:VOLTage:AC?;*WAI
INSTrument:NSELect 3
FETCh:VOLTage:AC?;*WAI
6.6.6 Returning Voltage and Current Data From the Data Buffer
The MEASure and FETCh queries can also return all 4096 data values of the instantaneous
voltage and current buffers. These are:
MEASure:ARRay:CURRent[:DC]?;*WAI
MEASure:ARRay:VOLTage[:DC]?;*WAI
6.6.7 Triggering Measurements
You can use the data acquisition trigger system to synchronize the timing of the voltage and
current data acquisition with an external trigger source. Then use the FETCh commands to
return different calculations from the data acquired by the measurement trigger.
The following measurement trigger sources can be selected:
IMMediate Aquire the measurements immediate
SYNChronize Internal to phase A angle
BUS IEEE-488 device, *TRG, or (Group Execute Trigger)
TTLTrg The signal driving the Trigger Out