MEAS:CURR:DC? starts a new measurement and then queries the DC current.
FETC:CURR:DC? queries the DC current without starting a new measurement.
The valid modes (parameters to the OUTP:COUP command) are DC, ACDC, and EDC (PCR-M only).
Returns the DC current in NR3 format in response to MEAS:CURR:DC? or FETC:CURR:DC?.
In case of the single-phase three-wire output, MEAS:CURR:DC? or FETC:CURR:DC? returns a comma-separated list of the DC current <NR3> for U and V phases.