Valmet Valmet MCA, Installation & Owner'S Manual, Page: 39 / 66

9.3. Recipes
The Recipe function may be necessary in special
functions in which measurement conditions change so
much that one calibration cannot cover it. Such a
change may be e.g.
– A change in consistency greater than the device
measurement range (±9 - ±15% depending on the
type of sensor),
– A change in the measured material, since different
materials have different consistency sensitivity or
– A large chemical fluctuation (e.g. change of chemical
type) that cannot be compensated for with chemical
compensation.
In these cases, each process condition has its own
calibration and configuration performed. This calibration
and configuration is saved as its own recipe. In addition
to consistency calibration, for each recipe you can set
chemical compensation, temperature consistency cor-
rection, sensitivity correction, and current output scal-
ing.
You can save a maximum of four recipes. If a recipe
is in use, MCA indicates this by showing the name of
the recipe on the main display status line instead of the
OK text that is normally shown.
In Special Functions menu, select 4 (Recipes). The
following display appears:
1 = C h o o s e r e c i p e
2 = C l e a r r e c i p e
Using Recipes
You can select a recipe either manually using the
keypad or with a binary control lines attached to the
TCU. In Recipes menu, select 1 (Select recipe). The
following display appears:
Select rec: OFF
1.--------000000
2.--------000000
3.--------000000
4.--------000000
Press the Edit button to make the cursor appear in the
Select field in the first row. Use the up and down arrows
to select the desired recipe number (1-4) or the ‘Binary’
selection method. If you select ‘Binary’, then the recipe
is determined by the TCU binary inputs Bin0 and Bin1
(refer to section 9.4 subsection Selecting the Recipe
with Binary Inputs).
You may name the recipe if you wish as follows.
Move the cursor to the desired recipe and write the
name. Successive pressing on the number keys scrolls
through the letters marked on the key. If you do not
name the recipe, then the program gives it a default
name (RES01, etc.).
Press Save to save the recipe selection and recipe
name. The date (ddmmyy) after the recipe name indic-
ates the most recent calibration change. The text ‘ON’
after the date indicates that the recipe in question is in
use.
S e l e c t r e c : 1
1 . R E C 0 1 - - - 1 5 0 4 0 5 O N
2 . - - - - - - - - 0 0 0 0 0 0
3 . - - - - - - - - 0 0 0 0 0 0
4 . - - - - - - - - 0 0 0 0 0 0
When process conditions change such that you need
a new recipe, select the new recipe either manually or
based on binary input according to the instructions
above.
S e l e c t : B I N
1 . R E C 0 1 - - - 1 5 0 4 0 5 O N
2 . R E C 0 2 - - - 2 2 0 4 0 5
3 . - - - - - - - - 0 0 0 0 0 0
4 . - - - - - - - - 0 0 0 0 0 0
The program saves the recipe calibration as for the
previous recipe. The date 000000 indicates that the
new recipe is not calibrated with its own sample. Per-
form calibration with a new sample according to the
instructions in section 7. After calibration, the date
000000 changes to the calibration date.
If necessary, scale the current output according to
the instructions in section 6.2 and configure the special
functions according to the instructions in chapter 9.
Configure recipes 3 and 4 in the same way.
Installation & Owner’s manual OUL00298 V2.3 EN 39 Valmet Mircowave Consistency Transmitter