Tutorial
Measurement of the Integrated Power
First, set the voltage and current ranges.
Set the current range to match the maximum load current during the test. The auto range feature fixes the range when integration starts. Even if you use the auto range feature, there are times when the range is exceeded during integration.
SENSe:VOLTage:RANGe:AUTO ON 'Set the voltage range to auto range.
SENSe:CURRent:RANGe 100MA 'Set the current range to 100 mA.
When you are measuring a comparatively small current (100 mA or less), use the low pass filter. This limits the noise that the AC power supply generates and enables correct measurements.
If you know how long you want to integrate for, set the integration time.
SENSe:FILTer ON 'Turn on the low pass filter.
INTEGrate:TIMer ON 'Enable the INTEG:TIM:COUN command.
INTEGrate:TIMer:COUNt 1,0,0 'Set the integration time to 1 hour.
If you do not set INTEG:TIM to ON, even if you use INTEG:TIM:COUN to set the integration time, integration will continue for 9999 hours and 59 minutes.
After you have finished configuring the settings, start the integration.
INTEGrate:STARt ON 'Start the integration.
During integration, you can only send queries for the SENSe subsystem, INTEG:TIM, and INTEG:TIM:COUN commands. If you send one of these commands to configure settings while the KPM1000 is performing integration, an error (-221, Settings conflict) will occur.
Because the MEASure? query sets some of the measurement conditions to the default values, you cannot use this query to measure the integrated current, integrated voltage, or integration time. If you send the MEASure? query while the KPM1000 is performing integration, an error (-221, Settings conflict) will occur.
Use the READ command or the FETCh command to query the integrated values.
READ:CURRent:AC:INTEGrate? 'Query the integrated current.
READ:POWer:AC:INTEGrate? 'Query the integrated power.
READ:TIMe:INTEGrate? 'Query the integration time.
The default *RST command does not clear the integrated values.
If you have set the integration time, integration finishes when this time elapses.
If you have not set the integration time, you can stop integration by sending the INTEG:STAR command.
INTEGrate:STARt OFF 'Stop integration.
If you stop integration but you do not clear the integrated values, the SENSe subsystem, INTEG:TIM, and INTEG:TIM:COUN commands that you use to configure settings will be invalid.
Use the INTEG:RES command to clear the integrated values.