/*
 * \file nist_poly.h
 *
 * \brief Computation of NIST inverse thermocouple functions.

 + NIST coeeficients are used to compute the temperature from the voltage
 * generated by the thermocouple.
 *
 * The functions for the J type thermocouple are implemented as a
 * polynomial, in the form
 *
 *    T = d_0 + d_1 E + d_2 E^2 + ...
 *
 * and as a product of first order terms:
 *
 *    T = d_0 + E ( d_1 + E (d_2 + ...)
 */

/* \function double NIST_J_inv_poly(double voltage);
 *
 * \brief Computes the temperature using a polynomial on E,
 *        where E is the voltage generated by the thermocouple.
 *
 */
double NIST_J_inv_poly(double voltage);


/* \function double NIST_J_inv_fact(double voltage);
 *
 * \brief Computes the temperature as a product of first order terms on E.
 *        where E is the voltage generated by the thermocouple.
 * 
 */
double NIST_J_inv_fact(double voltage);