If Maxima is an option for you, then you can entirely automate the production of plots.
For an overview on available plot objects and options see
SMath with Maxima.
In X-Y Plot, you can use geometric objects to create the lines and perhaps also a legend.
BTW, there is no point of naming the variable Load.kAmp, because the value is converted to A anyways directly upon storage, unless you just store a number, bypassing the SMath unit system. When you retrieve numerical values, you decide what units to use, independently of what was originally used to specify the value.
NaOH_Demiwater_VECTOR_Kr.sm (208 KiB) downloaded 23 time(s).
Martin Kraska
Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx