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Current measurement subsystem – AMETEK Lx Series II Programming Manual User Manual

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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]?

Returns amplitude of the Nth harmonic of current

:PHASe?

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]? Returns neutral current harmonic amplitude

:PHASe?

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

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.