using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Calculations.Electric.RTD
{
public static class PT1000
{
private static readonly decimal KoeficientA = 0.0039083M;
private static readonly decimal KoeficientB = -0.0000005775M;
private static readonly decimal KoeficientC = -0.000000000004183M;
///
/// Recalculate temperature to PT1000 Resistance
///
/// Temperature in °C
/// Resistance PT1000
public static decimal TemperatureToResistance(decimal temperature)
{
if (temperature < 0)
{
return 1000 * (1 + KoeficientA * temperature + KoeficientB * (decimal)Math.Pow((double)temperature, 2) + KoeficientC * (decimal)Math.Pow((double)temperature, 3) * (temperature - 100));
}
else
{
return 1000 * (1 + KoeficientA * temperature + KoeficientB * (decimal)Math.Pow((double)temperature, 2));
}
}
///
/// Recalculate PT1000 resistance to Temperature
///
/// Resistance PT1000
/// Temperature in °C
public static double ResistanceToTemperature(double resistance)
{
return (Math.Sqrt((double)KoeficientB * (resistance / 10) - 100 * (double)KoeficientB + 25 * Math.Pow((double)KoeficientA, 2)) - 5 * (double)KoeficientA) / (double)(10 * KoeficientB);
}
///
/// Recalculate PT1000 resistance to Temperature
///
/// Resistance PT1000
/// Temperature in °C
public static double ResistanceToTemperature(decimal resistance)
{
return ResistanceToTemperature((double)resistance);
}
}
}