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>> Given what the machine does, it seems plausible that the conversion is
>> perfectly linear.
>>
>> A more important question is whether the conversion factor is *constant*
>> or not...
>
> If it is linear then the conversion factor must be constant.
What give you that idea?
It may be that the conversion is perfectly linear, but that the
conversion factor depends on the chemical composition of what you're
analysing. So each time you analyse a set of samples, there is a linear
conversion, but it's different each time.
> You need the input specs for the software.
It turns out the software itself can do the necessary conversion, so
problem solved...
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