California Instruments 2253iX Manual de instrucciones descargar pdf (Pagina 49)

Programming Manual Compact i / iX Series

AMETEK Programmable Power Division 49

4.9 Current Measurement Subsystem

This subsystem programs the current measurement capability of the i/iX Series. 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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