BCs160VA
Nov. 15, 1997
SMART-PULP Smart Consistency Transmitter
25
RECIPE n
PULPTYPE
ASH %
P1
P2
SAVE OK?
or
PASS=
Enter the recipe number. Possible numbers: 1 to 8.
Select the pulp type. You can select suitable pulp types for each sensor blade type
(BLADE TY) with the arrow keys. The codes of the available pulp types are given
below in the Pulp Types table. A pulp mix is defined on the basis of the dominant
pulp ingredient; if the proportions of different pulps are equal, you are free to specify
the pulp mix on the basis of any one of them. (Two-point calibration is
recommended.)
Enter the ash, i.e. filler, content (in per cents of total dry solids). If the
LABORATORY command is used for calibration, 0.0 is recommended in the NEW
RECIPE command.
Curve slope correction factor. In normal calibration you retain the default value
P1 = 1.
Offset term (zero correction). In normal calibration you retain the default value P2 =
0.
After pressing ENTER to accept the SAVE OK? prompt you return to the NEW RECI
level in the menu. If password protection is in use, the SAVE OK? prompt will be
replaced by the PASS= prompt. Answer the prompt by toggling for the correct
password with the arrow keys, then press ENTER.
2.3.2 The SAMPLING menu
NOTE! When calibrating recipe 1 the special grade
table must be erased.
SMART-PULP helps you in sample taking by
calculating the consistency’s average value and
standard deviation for the sampling period. SMART-
PULP is able to calculate and remember two
samples.
The sample(s) can be handled in two different ways:
Two calibration alternatives:
1. Single-point calibration
In this calibration the selected curve (which converts
the sensor’s shear force to consistency signal) is
moved in the direction of consistency so as to effect
a zero offset at the calibration point to eliminate the
difference between measured consistency and
sample consistency. The slope of the curve does not
change. The value of P2 changes in accordance
with the zero offset, while the value of P1 (slope
factor) stays unchanged.
In single-point calibration you can also take two
samples and use the one taken while the process
was steadier. The samples should preferably taken
at so-called setpoint consistency.
Single-point calibration is in most cases sufficient in
consistency control applications.
CALCULATION: P2 = LAB - sample average
P1 = unchanged
Pulp types:
The following list describes all pulp types offered by the
menu. Selected sensor type will exclude some of the pulp
type options. If you cannot get the desired pulp type,
ensure that the correct sensor type has been configured
and that the transmitter is equipped with that sensor type.
NOTE! Mechanical pulps are softwood pulps.
ULIN Unlinearized 0-30 N shear force range
without temperature correction.
Corresponding output display 0-100%
instead of consistency. This is the default value.
HWU Unbleached short-fibered chemical pulp,
e.g. birch pulp or eucalyptus, bagasse and
other agro fibers.
HWB Bleached short-fibered chemical pulp.
SWU Unbleached long-fibered chemical pulp,
e.g. pine and other softwood pulps.
SWB Bleached long-fibered chemical pulp.
GW Groundwood, including pressure groundwood.
TMPL Thermomechanical pulp, freeness less than
200ml CSF.
TMPH Thermomechanical pulp, freeness more
than 200ml CSF.
RMPL Refiner mechanical pulp, freeness less than
200ml CSF.
RMPH Refiner mechanical pulp, freeness more
than 200ml CSF.
CTMP Chemithermo-mechanical pulp.
RCFU Recycled fiber, unscreened; contains debris.
RCFS Recycled fiber, screened.
ROCCU Recycled fiber, packing board, unscreened
(OCC).
ROCCS Recycled fiber, packing board (OCC), screened.
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