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4 Using the Regenerative Power System
External Data Logging
Select the Measurement Function
Specify the Integration Period
Select the Elog Trigger Source
Initiate and Trigger the Elog
Periodically Retrieve the Data
Terminate the Elog
Introduction
The external data logging function can only be programmed using SCPI
commands.
Keysight RPS models have an "external" data logging function (Elog) that lets you continuously log
voltage and current measurements. Data logging is external to the instrument because logging must
be done using a PC to fetch recent measurements from the unit and then put them into a log file on the
PC. Voltage and current measurement data is temporarily stored in a FIFO (first-in, first-out) buffer in
the instrument. As this buffer is only large enough to hold about 20 seconds of data, you must
periodically empty the buffer to an external log file; otherwise the data in the buffer will be overwritten.
The following table details the various data logging functions.
Function
Data Storage
Buffers measurements for about 20 seconds and requires that the computer periodically reads measurements to
prevent the internal buffer from overflowing. The computer needs to provide the external data storage.
Measurement Functions
Both output voltage and output current can be logged.
Integration Period
During the specified integration period, the samples are averaged, and min and max values are tracked.
Data viewing
No front panel view or control. Data is collected and viewed externally.
Note that the Elog function uses the
Select the Measurement Function
The following commands select a measurement function:
Front Panel Menu Reference
Not available
154
acquire trigger process
SCPI Command
To enable voltage or current measurements:
SENS:ELOG:FUNC:VOLT ON
SENS:ELOG:FUNC:CURR ON
To enable min/max measurements:
SENS:ELOG:FUNC:VOLT:MINM ON
SENS:ELOG:FUNC:CURR:MINM ON
Keysight RP7970 & RP7980 Series Operating and Service Guide
Description
to make the measurements.
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