Instrument Commands; Fetch And Measure Subsystem - Delta A1500 Series User Manual

User Manual
A1500
AC Power Source
*SRE?
*STB?
*CLS

4.3.2 Instrument Commands

4.3.2.1 FETCH and MEASURE Subsystem

Differences between FETCH and MEASURE are: FETCH reads existing measurements
value. Execution time is shorter because data is available immediately but the data may
not be the newest. Instrument will send the next sampling data to the computer after
receiving MEASURE command. There is time delay so 100ms time interval between
MEASure command and query command is recommended. MEASure command is
suitable for the requirement of updated measurement value after power supply out status
changed.
Following are tree diagram for FETCH and MEASURE commands:
FETCh | MEASure
:CURRent
:AC?
:AMPLitude:MAXimum?
:CREStfactor?
:INRush?
:FREQuency?
:POWer
:AC
[:REAL]?
:APParent?
:PFACtor?
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Return status of flag mask status for service events.
Query value stored in service event register, 1 represents event occurs.
Clear status. Following operation may execute depends on different conditions.
1. Leave REMOTE control, back to panel control.
2. When one of the following error occurs, AC source will turn off output, clear
error status and return to main page.
 Software OCP
 D2A OCP Fault
 D2A OPP Fault
Query the total AC rms current
Query the total peak current
Query the total current crest factor
Query the total inrush current
Query average frequency
Query total real power
Query total apparent power
Query average power factor