Control

Rudi Stolk

Posted on 21.11.2013 14:32
Hello,

For controlling a laboratory measurement setup I would like to have a variable during the measurement, which is a kind of selector. This variable will be used to determine which analog channel value will be used in a math calculation. The value of the variable must be the same over time, e.g. when the value is changed during the measurement, the results in the whole recording must change.

I'm playing with control channels (single value), internal variables and data header variables, but I can't get it working. Is this possible in Dewesoft?

Thanks in advance,

Best regards,

Rudi
Marjan Grilj

Posted on 22.11.2013 14:45
Hello Rudi,

It should work to define variable in Control channels, you then need to put Control display visual control in Measure mode that enables changing variable in live. Such channels can also be used in Math. I can send you demo setup file - just leave me a note on support at dewesoft.com

Best regards
Rudi Stolk

Posted on 04.12.2013 15:39
Hello Marjan,

Your suggestion (via email) to use 'control channels' > 'single value' did not lead to the desired result. When using the input of a single-value-control-channel in a math channel, the result of the calculation is stored with the varying value of the control channel, when the value of the control channel is changed during the measurement.

I would like to use it as follows: the current value of the control-channel must be applied to the whole recording, whole time-domain. I do not get the function/difference of the 'single value' control channel, compared to the 'async' variant.

Best regards,

Rudi
Marjan Grilj

Posted on 05.12.2013 09:23
If Math channels must be variable, then calculation can only be done in post analysis as Recalculate function since it needs to calculate values for the whole datafile!

It is also possible to define Math channels as Single value: Formula > Time Axis > Single value database. Then it will work during the measurement also.

Best regards
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