AMETEK Lx Series II Programming Manual - Manual (Page 59)

Programming Manual Lx \ Ls Series II
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Query Syntax MEASure[:SCALar]:CURRent:NEUTral:HARMonic
[:AMPLitude]?
FETCh[:SCALar]:CURRent:NEUTral:HARMonic
[:AMPLitude]?
Parameters 0 to 50
Examples MEAS:CURR:NEUT:HARM? 3 FETC:CURR:NEUT:HARM? 1
Returned Parameters
Related Commands INST:NSEL
MEASure:CURRent:NEUTral:HARMonic:PHASe?
FETCh:CURRent:NEUTral:HARMonic:PHASe?
These queries return the phase angle of the Nth harmonic of current in the neutral output terminal
of a three-phase, referenced to the positive zero crossing of the fundamental component.
The parameter is the desired harmonic number. Queries sent with a value of 0 return the dc
component. A value of 1 returns the fundamental output frequency. Harmonic orders can be
measured up to the fundamental measurement bandwidth of the measurement system, which is
16 kHz. Thus, the maximum harmonic that can be measured is dependent on the output
frequency. Any harmonics that represent frequencies greater than 16 kHz are returned as 0.
Query Syntax MEASure[:SCALar]:CURRent:NEUTral:HARMonic
:PHASe?
FETCh[:SCALar]:CURRent:NEUTral:HARMonic
:PHASe?
Parameters 0 to 50
Examples MEAS:CURR:NEUT:HARM:PHAS? 3
FETC:CURR:NEUT:HARM:PHAS? 1
Returned Parameters
Related Commands INST:NSEL
MEASure:THDistortion:MODE
This command sets the calculation method for THD measurements. The distortion calculation is
based on the H2 through H50 with the RMS voltage or current in the denominator. Note that some
definitions of THD use the fundamental component (H1) of the voltage or as the denominator.
Lx/Ls units with firmware revision 0.88 or higher can be programmed to use the fundamental
component as the denominator instead of the RMS value. This mode can only be programmed
over the bus by sending the “MEAS:THD:MODE FUND” command. At power up or after a reset
command, the mode will revert back to the RMS mode. This mode setting is not saved in any of
the set up registers.
Syntax MEASure:THDistortion:MODE
Parameters RMSQuare | FUNDamental
Examples MEAS:THD:MODE FUND
Query Syntax MEAS:THD:MODE?
Returned Parameters
Related Commands MEAS:VOLT:HARM:THD? MEAS:CURR:HARM:THD?