Chapter 3
Signal Connections
©
National Instruments Corporation
3-7
computed in nested form. Consider the following fourth order polynomial:
If this polynomial is evaluated as it is written, several extra multiplications
will be performed to raise x to the various powers. If the polynomial is
instead written as follows:
and evaluated this way, no powers are computed, and execution proceeds
much faster. Table 3-3 lists the National Institute of Standards
and Technology (NIST) polynomial coefficients for several popular
thermocouples.
T
a
0
a
1
x
a
2
x
2
a
3
x
3
a
4
x
4
+
+
+
+
=
T
a
0
x a
1
x a
2
x a
3
xa
4
+
(
)
+
(
)
+
(
)
+
=