Scaling Operations - OPTO 22 PCI-AC51 User Manual

Scaling Operations

Function Function
Type
long PamuxUtilScaleI2I
float PamuxUtilScaleI2F
float PamuxUtilScaleF2F
long PamuxUtilScaleF2I
* Note for Visual Basic users: * indicates a "by reference" argument.
CHAPTER 3: SETTING UP AND USING THE SDK
Parameter Parameter
Type
long
X1
long
X2
long
Y1
long
Y2
long
Xin
long
X1
long
X2
float These interpolation functions are useful for con-
Y1
verting between engineering units and raw ana-
float
Y2 log counts. Pamux analog input and output
values range between 0 and FFF hex (4,095
long
Xin
decimal). These values typically correspond to
engineering units, such as pH and psi. For
float
X1
example, to convert raw counts (from 0 to FFF
hex) to a percentage, use:
float
X2
float fPercent=PamuxUtilScaleI2F
float (0,0xFFF,0.0,100.0,RawCount);
Y1
float
Y2
float
Xin
float
X1
float
X2
long
Y1
long
Y2
float
Xin
Description
PCI-AC51 User's Guide
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