Ametek Lx Series II Programming Manual Manuale Utente Pagina 55

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Programming Manual Lx \ Ls Series II
51
4.9 Current Measurement Subsystem
This subsystem programs the current measurement capability of the 3000Lx and the 4500Lx. Two
measurement commands are available: MEASure and FETCh.
MEASure triggers the acquisition of new measurement data before returning a reading.
FETCh returns a reading computed from previously acquired data.
Individual outputs of a three-phase source are specified by the setting of INSTrument:NSELect.
Subsystem Syntax
MEASure | FETCh
[:SCALar]
:CURRent
[:DC]? Returns dc component of the current
:AC? Returns ac rms current
:ACDC? Returns ac+dc rms current
:AMPLitude
:MAX? Returns non-recurring peak current
:RESet Clear the non-recurring peak current.
:CREStfactor? Returns current crestfactor
:HARMonic
[:AMPLitude]? <n> Returns amplitude of the Nth harmonic of current
:PHASe? <n> Returns phase of the Nth harmonic of current
:THD? Returns % of total harmonic distortion of current
:NEUTral
[:DC]? Returns neutral dc current (3-phase only)
:AC? Returns neutral ac rms current (3-phase only)
:ACDC? Returns neutral ac+dc rms current (3-phase only)
:HARMonic
[:AMPLitude]? <n> Returns neutral current harmonic amplitude
:PHASe? <n> Returns neutral current harmonic phase
:THD:MODE RMSQ | FUND Sets THD calculation to either RMS or Fundamental
mode.
MEASure:CURRent?
FETCh:CURRent?
Phase Selectable
These queries return the dc component of the output current being sourced at the output
terminals.
Query Syntax MEASure[:SCALar]:CURRent[:DC]?
FETCh[:SCALar]:CURRent[:DC]?
Parameters None
Examples MEAS:CURR? FETC:CURR?
Returned Parameters <NR3>
Related Commands INST:NSEL
MEASure:CURRent:AC?
FETCh:CURRent:AC?
Phase Selectable
These queries return the ac component rms current being sourced at the output terminals.
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