Valmet Valmet MCA, Инструкция по установке и эксплуатации, Страница: 30 / 66

7.2. Entering Laboratory Results
When you have determined the sample's laboratory
consistency, press the ESC button to move from the
main menu to the Operations menu. Select Calibration
/ Enter Lab, after which the following menu appears:
d d . m m . y y h h : m m
M C A = 0 0 . 0 0 % C s
L a b = 0 0 . 0 0 % C s
F i l l e r = 0 . 0 0 % C s
The first row shows the sample's date and time in
the following format: dd.mm.yy, hh:mm. The second
row shows the consistency measured by Valmet MCA.
Press the Edit button to make the cursor appear in the
Lab field. In the Lab field, enter the calibration sample's
laboratory consistency. If the pulp contains fillers, enter
in the fourth row in the Filler field the filler amount,
which shows the proportional amount of filler as a per-
centage of the overall consistency. If the pulp does not
contain filler, press the Save button to save your
changes.
If you enter a value larger than zero in the Filler field,
use the down arrow to move to the following lines. Enter
the proportional amount of each filler component. If the
filler consists, for example, entirely of kaolin, enter
100% as the value of kaolin.
Press the Save button to save your changes.
NOTE: The lines Chem, MCA con and Lab con are needed
only for the chemicals compensation (chapter 9.1).
NOTE: The value for total filler sensitivity need only be
entered with a 5 percentage point accuracy. The filler
components can also be entered based on an estimate.
NOTE: The sum of the proportions must equal 100%.
After you press Save, the device calculates the filler
sensitivity value in the Filler sens field in the bottom
line. This is the factor by which the device adjusts the
default sensitivity set for the wood fiber.
The laboratory value for the sample can be entered
only once in the Enter Lab menu. If necessary, you can
perform offset correction for the consistency calibration
or change filler content as explained in the next
chapters.
7.3. Offset Correction
If laboratory monitoring indicates that the Valmet MCA
measurement results are consistently overly high or
low, you can correct this by performing offset correction
on the calibration. To do so, press the ESC to move
from the main display to the Operations menu. Select
Calibration/ Offset correction, after which you see the
following display:
O f f s e t = 0 . 0 0 %
C u m . o f f s e t = 0 . 0 0 %
Press the Edit button to make the cursor appear in
the Offset field. Enter the desired offset correction
value. If, for example, Valmet MCA shows a value that
according to laboratory monitoring is 0.1% too high,
enter an offset correction value of -0.1%. Press Save
button to save your changes.
7.4. Fillers
In this menu you can enter Filler sensitivity changes,
if the filler sensitivity of the measured mass changes
considerably (>10%). Press the down arrow to scroll
down the display one row at a time.
Filler = 20.0 %
Kaolin = 100.0 %
CaCO3 = 00.0 %
Talc = 00.0 %
TiO2 = 00.0 %
Filler sens.=0.97
Enter a new value for Filler amount in the Filler field
and new values for the filler components in the respect-
ive fields. In the bottom row in the Filler sens field, the
program calculates the change in sensitivity caused by
filler components in proportion to the wood fiber sens-
itivity (wood fiber sensitivity = 1).
Installation & Owner’s manual OUL00298 V2.3 EN 30 Valmet Mircowave Consistency Transmitter