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I intend to use the 2400 sourcemeter to measure a tiny current at a fixed voltage of 10V. Noise is an issue, filtering is therefore required.
If I do it manually, I'd set the voltage to 10V, set the device to measure the current (1 microAmp range), and set a moving filter of say 30 samples. The display shows the result I want, a nicely smoothed value.
I'm tired of writing these values down, hence I want to do this remotely (RS232), via an already existing larger Labwindows/CVI application (that controls the rest of a large set-up) but I cannot get the filtering to work.
The application that reads the current may not be loaded too much, hence communication and waiting times should be minimal.
I do it now via multiple ":READ?" commands, and on the display I can see the value nearing the average value. This is too much load for the application.
How can I program the device such that it continuously performs readings, continuously averages the result, and I use a single serial command to read the most recent average result?
Can anyone help with example code, or the steps to follow to obtain the result?
- Keithley Applications
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Then each reading with a :READ? is an average of 30 samples.
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