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Command Summary - C
87
MEASure:ARRay:CURRent:HARMonic?
This query returns an array of current harmonic magnitudes. Operation of the query is modified by the
SYSTem:CONF command (see summary table under SYSTem:CONFigure). The parameter specifies the
number of harmonic arrays to be returned in response to the query. If SYSTem:CONFigure specifies
NORMal operation, the parameter is ignored (ie it is forced to 1). If SYSTem:CONFigure specifies IEC
operation, the SOURce:FREQuency and SENSe:WINDow commands are coupled to modify operation of
the measurement underlying the query as shown in the following table:
SOURce:FREQ SENSe:WINDow Sample Rate
Acquisition
Window
Acquisition
Overlap
50 Hz RECTangular 12.8 KHz 320 ms None
50 Hz HANNing 8.533 KHz 480 ms 50%
60 Hz RECTangular 15.360 KHz 266.7 ms None
60 Hz HANNing 7.680 KHz 533.3 ms 50%
SYSTem:CONFigure also impacts availability of the RMS Current, RMS Voltage, Real Power values. If
SYSTem:CONFigure is set to NORMal, these values are not available. If SYSTem:CONFigure is set to
IEC, the values are returned with the harmonic data. The integration time for these values equals the
acquisition window period.
IEC mode operation conforms to IEC and EN requirements for compliance testing of harmonic currents
(EN 60555 Part 2 and related regulations). The ac source will accept parameters in the range shown
below, however, values greater or equal to (2^31)-1 will be interpreted as infinity. Record numbering
begins with one. The figure below defines the structure of the data returned by this query:
Fundamental
40 harmonic values
↓
40th Harmonic
Rms Current
Rms Voltage
repeat <n> times
Real Power
Record Number
Error Code
Command Syntax
MEASure:ARRay:CURRent:HARMonic? <NRf+>
Parameters
1 to 9.9E37
Examples
MEAS:ARR:CURR:HARM? 1024
Related Commands
ABORt SYST:CONF INST:NSEL SENS:WIND
SOUR:FREQ