Quick Results Guide
39
Remote command programming
SCPI commands
SCPI commands for the built-in math functions are listed in Table 19.
NOTE
The percent deviation math function is not provided as a built-in math function for
remote operation. However, it can be configured as a user-defined expression (see
CALCulate[1] commands in Section 18 of the 2400 Series SourceMeter User’s
Manual).
Programming example
The programming example in Table 20 configures the SourceMeter to operate as a power
meter (power = V x I). Programming examples for other math functions are provided in the
2400 Series SourceMeter User’s Manual (see CALCulate1 subsystem in Section 18).
Table 19
SCPI commands; built-in math functions
Command Description
:CALCulate:MATH:NAME <name> Select math expression; <name> = “POWER”, “OFF-
COMPOHM”, “VOLTCOEF” or “VARALPHA”.
:CALCulate:STATe <b>
Enable/disable math; <b> = ON or OFF.
:CALCulate:DATA?
Query math data.
Table 20
Command sequence for power measurement example
Command*
Comments
*RST
Restore GPIB defaults (source 0V, measure I).
:SOUR:VOLT:RANG 0.2
Select the 200mV source range.
:SENS:FUNC “VOLT”, “CURR”
Select V and I meaurement functions.
:SENS:CURR:PROT 100e-3
Set current compliance to 100mA.
:SENS:VOLT:RANG:AUTO ON
Select auto range for voltage measurements.
:SENS:CURR:RANG:AUTO ON
Select auto range for current measurements.
:CALC:MATH:NAME “POWER”
Select the power math expression.
:CALC:STAT ON
Enable math.
:OUTP ON
Turn output on.
:INIT
Trigger source-measure action.
:CALC:DATA?
Request power reading.
:OUTP OFF
Turn output off.
*SourceMeter must be addressed to talk after sending :CALC:DATA? to acquire power reading.
