I am acquiring thermocouple signals, using a timed loop that gets the temperatures of several thermocouples every 0.5 second (typically). I want these signals to appear on a chart.
I can get them all on the same chart by wiring either (a) a cluster of values or (b) a cluster of waveforms, each waveform containing a 1D array of a single value.
How can I tell the chart that the x-increment between readings is 0.5 second? The x-axis values always seem to be array index numbers, not times. Can I choose between x scales in seconds, minutes or hours?
I have two simple examples, using random numbers to simulate 4 channels:
(a) chart format test.vi has a loop passing a cluster of values to the chart,
(b) chart format test 2.vi makes each value into a waveform; these are then turned into a cluster containing 4 waveforms.
In each case I am trying to set Xscale.RngStart and Xscale.Increment but they seem to have no effect - if I run these VIs for 5 seconds (100 readings from each "thermocouple"), I want the x-axis to go from 0 to 5 seconds, not 0 to 100.
Thanks
Roger