16 Using Special Functions
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•
Activate/deactivate the check box "Protect function against changes by
other users".
•
Enter a comment to describe this user function.
This comment will not be printed, exported or displayed anywhere but is only
an internal description of your user function.
5. Tap <Next>.
6. Define the input quantity and tap <Next>.
7. Enter "Offset" and "Factor" for your linear function and tap <OK>.
To program or edit a polynomial (one- or two-dimensional)
The general formula for a one-dimensional polynomial is:
f(x) = coeff1 * x + coeff2 * x
2
+ coeff3 * x
3
+ coeff4 * x
4
The general formula for a two-dimensional polynomial is:
f(x) = C Coeff01 * y + Coeff02 * y
2
+ Coeff03 * y
3
+ Coeff10 * x +
Coeff11 * x * y + Coeff12 * x * y
2
+ Coeff20 * x
2
+ Coeff21 * x
2
* y +
Coeff30 * x
3
1. Tap <Menu> and select
"Setup > Expert Settings > User Function
Management"
to open the user functions list.
2. Tap <New> to program a new polynomial or highlight an existing polynomial
and tap <Edit> to open the four-step "User Function" wizard.
3. Perform the following settings:
•
Enter a name for the polynomial (up to 50 characters long).
•
Use the drop-down box "Function Type" to select the polynomial type.
•
Use the drop-down box "Physical Quantity" to select the type of quantity
you want to calculate.
•
Use the drop-down box "Unit" to select the output unit.
4. Tap <Next>.
•
Activate/deactivate the check box "Protect function against changes by
other users".
•
Enter a comment to describe this user function.
This comment will not be printed, exported or displayed anywhere but is only
an internal description of your user function.
x ......
selected input quantity
f(x) ...
calculated output quantity
x ..........
selected first input quantity
y ..........
selected second input quantity
f(x,y) ...
calculated output quantity
