Texas Instruments CBL

CBLé System Guidebook 81
CMD4—Conversion Equation Setup
CMD4 Syntax and Parameters
{4,equation_number,equation_type,equation_order,constant,
units_display}
Equation # Equation Type Equation Order Constants Units Display
0 =
Clear all
equations
1
–
4 =
Equation
number
0= Clear specific equation
1= polynomial
2= mixed polynomial
3= power
4= mod. power
5= logarithmic
6= mod. logarithmic
7= exponential
8= mod. exponential
9= geometric
10= mod. geometric
11= reciprocal logarithmic
12= Steinhart-Hart model
integers (m,n): 0,1,
or 2 integers
per model
*
Only applies to
equation types 1
and 2; this field
omitted for
equation types
3–12.
real
K
0
...K
n
(type 1)
K
-
m
...K
n
(type 2)
0= None
1= °F
2= °C
3= K
Equation Type Equation Form Restrictions
1 Polynomial (order:
n=1-9)
K
0
+ K
1
X + K
2
X
2
+...+ K
n
X
n
*
2 Mixed polynomial
(order: m=0-4, n=0-4,
m+n>0)
K
-
m
X
-m
+...+ K
-
1
X
-1
+ K
0
+ K
1
X +...+
K
n
X
n
Xƒ0
3 Power K
0
X
(K
1
)
X>0
4 Modified power K
0
K
1
(X)
K
1
‚ 0
5 Logarithmic K
0
+ K
1
ln(X) X>0
6 Modified logarithmic K
0
+ K
1
ln(1/X) X>0
7 Exponential K
0
e
(K
1
X)
*
8 Modified exponential K
0
e
(K
1
/X
)
Xƒ0
9 Geometric K
0
X
(K
1
X)
X‚0
10 Modified geometric K
0
X
(K
1
/X)
X>0
11 Reciprocal logarithmic [K
0
+ K
1
ln(K
2
X)]
L
1
K
2
X>0
12 Steinhart-Hart model [K
0
+ K
1
(ln 1000X)+K
2
(ln 1000X)
3
]
L
1
X>0
* No restrictions other than overflow.