BTG Pulptec SBT-2400, Руководство пользователя

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4.2 - Operations with JCT-1200
M2041/5en SBT-2400 Operating Instructions 23
©BTG 2006
4.2 Operations with JCT-1200
4.2.1 View Measurement
Select one of the three windows by pressing the Next (F2) key.
The first window shows Cons in a large font.
The second window shows Raw signal in a large font.
The third window shows all values in normal font.
4.2.2 Change Range
In SBT-2400 four different ranges are available. For more information, see the
JCT-1200 manual. To change between the ranges, use binary input on the
Range Select Inputs in the JCT-1200.
NOTE!
Only for DCS!
4.2.3 Calibration
It is easy to calibrate the SBT-2400 to the actual pulp. There is a number of
calibration sets for a lot of different pulps which fits in most cases. See section
7.7:
Blade Selection Guide for calibration constants for different pulps and dif-
ferent blades. If the appropriate constants are not in the guide, contact BTG
service personnel for information or proceed with a multi-point calibration to
calculate specific constants for your pulp.
When using the constants from the guide, a single point calibration with an off-
set adjustment at the target consistency will put the transmitter in a good cali-
brated status. A multipoint calibration with up to nine lab samples will of course
make the transmitter perform even better.
• Single-point calibration
A single point calibration is used with already made calibration constants
to adjust for the specific pulp. Even though the pulp is listed in the Blade
selection guide, every installation will differ slightly. The calibration will set
an offset adjustment only.
The operation needed is to take one sample according to section 4.2.4:
Take New Sample Values and note the consistency value from the sam-
pling results page on the specific sample. When the laboratory test is fin-
ished the deviation can be calculated and entered as on offset in the basic
calibration page.
• Multi-point calibration
In some occasions there is a need for a more precise calibration. The pulp
could be very different from the ones listed in section 7.7:
Blade Selection
Guide or a mix of different pulp grades. In these cases a multiple point cal-
ibration is preferred to have the SBT-2400 work as expected.