EPICS changing unit string to scale factor

Experimental Physics and Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	changing unit string to scale factor
From:	Randall Cayford via Tech-talk <tech-talk at aps.anl.gov>
To:	"Engbretson, Mark S. via Tech-talk" <tech-talk at aps.anl.gov>
Date:	Mon, 25 Jan 2021 12:16:24 -0800

I have a device which returns a value and a string indicating the units of the value.  I’ll get inputs like 0.3nA or 3.4mA, etc.  Since I want to report the value in a consistent unit, I want to convert the unit string to a scale factor (nA=1, uA=1000, mA=10000) and then use a calc record to scale the value.   CALC records seem to only take numbers as input and I don’t see any other appropriate record type.

In programming I would use a case statement or if-elseif constructs.  How do I do this with EPICS record processing?

Randall
LBNL

Replies:: RE: changing unit string to scale factor Mark Rivers via Tech-talk; Re: changing unit string to scale factor Zimoch Dirk (PSI) via Tech-talk

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