internal static double TValueToRValue(double t, ABCParam param, ConvertMethod method)
{
double rnew, tnew;
if (method == ConvertMethod.ITS90)
{
double ac, bc, cc;
param.targetT = t;
ac = param.a;
bc = param.b;
cc = param.c;
rnew = GetWr(t);
return(rnew + ac * (rnew - 1) + bc * (rnew - 1) * (rnew - 1) + cc * (rnew - 1) * (rnew - 1) * (rnew - 1));
}
if (method == ConvertMethod.DIN68 || method == ConvertMethod.DIN90 || method == ConvertMethod.ASTM)
{
double alpha, A, B, C;
alpha = A = B = C = 0;
if (method == ConvertMethod.DIN68)
{
alpha = 0.003850;
param.rtp = 100;
A = 3.90802e-3;
B = -5.8020e-7;
C = -4.2735e-12;
}
if (method == ConvertMethod.DIN90)
{
alpha = 0;
param.rtp = 100;
A = 3.90823e-3;
B = -5.7750e-7;
C = -4.1830e-12;
if (t >= 0)
{
C = 0;
}
}
if (method == ConvertMethod.ASTM)
{
alpha = 0.003911;
param.rtp = 100;
A = 3.9692e-3;
B = -5.8495e-7;
C = -4.2325e-12;
}
tnew = t;
return(param.rtp * (1 + A * tnew + B * tnew * tnew + C * (tnew - 100) * tnew * tnew * tnew));
}
throw new Exception("Unexpected convert method " + method.ToString());
}
internal static double TValueToRValue(double t, ABCParam param, ConvertMethod method)
{
double rnew,tnew;
if (method == ConvertMethod.ITS90)
{
double ac, bc, cc;
param.targetT = t;
ac = param.a;
bc = param.b;
cc = param.c;
rnew = GetWr(t);
return rnew + ac * (rnew - 1) + bc * (rnew - 1) * (rnew - 1) + cc * (rnew - 1) * (rnew - 1) * (rnew - 1);
}
if (method == ConvertMethod.DIN68 || method == ConvertMethod.DIN90 || method == ConvertMethod.ASTM)
{
double alpha, A, B, C;
alpha = A = B = C = 0;
if (method == ConvertMethod.DIN68)
{
alpha = 0.003850;
param.rtp = 100;
A = 3.90802e-3;
B = -5.8020e-7;
C = -4.2735e-12;
}
if (method == ConvertMethod.DIN90)
{
alpha = 0;
param.rtp = 100;
A = 3.90823e-3;
B = -5.7750e-7;
C = -4.1830e-12;
if (t >= 0)
C = 0;
}
if (method == ConvertMethod.ASTM)
{
alpha = 0.003911;
param.rtp = 100;
A = 3.9692e-3;
B = -5.8495e-7;
C = -4.2325e-12;
}
tnew = t;
return param.rtp * (1 + A * tnew + B * tnew * tnew + C * (tnew - 100) * tnew * tnew * tnew);
}
throw new Exception("Unexpected convert method " + method.ToString());
}