Current measurement subsystem – AMETEK Lx Series II Programming Manual User Manual
Page 55

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]?
: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.