9 point calibration test
This video tersely explains what a 9 point calibration test is and how to find the nine points so that you can test them no matter what LRV and URV you are wanting to test.
A transmitter or a controller are two devices that may need to be tested using the 9 point calibration test.
This video will show you how to find the span you need.
It will show you how to find what your transmission value should be for a given percentage of your measurement span.
This video show you how to use your lower range value (lrv) and upper range value (urv).
This video will show you how to examine the relationship of your different signals.