Argantix KDC 80-62 Manuel d'utilisateur télécharger pdf (Page 36)

Programming Manual

4.4 Measurement Subsystem

This subsystem programs the measurement capability of the power supply.

Subsystem Syntax

MEASure/FETch

:ARRay

:CURRent[:DC]? Returns the DC current data points.

:MODE BINary or ASCii data format

:POWer[:DC]? Returns the DC power measurement data points.

:VOLTage[:DC]? Returns the DC voltage measurement data points.

[:SCALar]

:CURRent

[:DC]? Returns the average DC value of current

:AMPLitude

:MAX? Returns peak current measurement reading.

:RESet Resets the peak current measurements.

:POWer [:DC]? Returns the DC power measurement reading.

:VOLTage[:DC]? Returns the DC voltage measurement reading.

Fetch or Measure formats:

All measurement commands are available in either measure or fetch query formats. A measure

command will always force new data to be acquired and transferred. A fetch command on the

other hand will return the last data available. Sending repeated fetch commands will cause the

same result to be returned unless or until a measurement trigger is generated in some way,

either as the result of a bus command or a measurement trigger event caused by another

source such as the transient system. For example, if it is important to retrieve both voltage and

current readings from the same moment in time, use the MEAS form to query the voltage

followed by the FETCh form to query the current. This will ensure that both readings are

calculated from the same acquisition window (buffer).

Regardless of the measurement format used, it is required to append a ;*WAI command to each

measurement query to ensure the GPIB bus controller is held until the measurement result is

available to be received by the application program. If not, subsequent query results may

interfere with the response data to the query. Thus, issue MEAS:VOLT?;*WAI to measure the

voltage.

MEASure:ARRay:CURRent[:DC]?

FETCh:ARRay:CURRent[:DC]?

These queries return an array containing the instantaneous output current in amperes. The data

returned in arbitrary block data format as follows:

#5<block length n><b0><b1><b2><b3>.....<bn-3><bn -2><bn-1><bn>

where b0,b1,b2,b3 are four hex bytes represent IEEE single precision floating number, where b0

is the most significant byte and b3 is the least significant byte.

The output voltage, current and power are digitized whenever a measure command is given or

whenever an acquire trigger occurs. The time interval between samples can range from 20.833

microseconds (48 Ks/s) to 208.33 microseconds (4.8 Ks/s). The query

SENSe:SWEep:TINTerval? will return the time interval, the position of the trigger relative to the

beginning of the data buffer is determined by SENSe:SWEep:OFFSet.

KDC Series DC Power Supplies 35

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 119 120

Commentaires sur ces manuels

Pas de commentaire

Argantix KDC 80-62 Manuel d'utilisateur Page 36

Commentaires sur ces manuels

Produits connexes et manuels pour Unités d'alimentation électrique Argantix KDC 80-62