5.2 - Maintenance Routines
M2041/5en
SBT-2400 Service Instructions
37
©BTG 2006
5.2.3
Calibration of Transmitter
The factory preset for the transmitter is equal to a shear force of
0-15 N. This represents a consistency span of approximately 0 – 6% long-fiber
chemical pulp and approximately 0 - 7% short-fiber chemical pulp for blade A.
A basic calibration is required when:
•
The blade is changed to another type (different weight).
•
The basic setting must be verified.
•
The signal does not correlate to the laboratory consistency samples.
•
The blade has been exposed to a very high mechanical force.
5.2.3.1
Basic Force Calibration with JCT-1200
Prerequisites:
That the transmitter is mounted in the calibration wise with the
blade pointing sideways (horizontal) and that the JCT-1200 is connected and
working.
1. Press the
Menu (F1)
key, step down through the menu tree to the
Shear
force trim
window.
2. Note the value for
Raw
.
3. Select the
Blade
value and press the
Edit (F3)
key.
4. Enter the noted value and press
OK (F1)
.
5. Turn the transmitter with blade pointing downwards.
6. Place the calibration weight in the hole in the blade.
7. Wait until
Raw
signal have stabilized. Wait approx. 30 minutes.
8. Note the value for
Raw
.
9. Select the
Blade+weight
option and press the
Edit (F3)
key.
Tools required:
Calibration stand
Calibration weight
TYPE
NO
POWER
SOURCE
POWER
SOURCE
BTG
P
ulp
&
P
aper
Sensors
AB,
Industrigat
an
1-3661
2
9
S
äf
fle,
S
WEDEN
BTG
Pulp
&
Paper
Sensors
AB,
Industrigat
an
1-3661
29
Säf
fle,
SWEDEN
OUTPUT
VOL
T
AGE
4-20
m
A
4-20
mA
35
VDC
m
ax
35
VDC
max
NEC
Class
2
NEC
Class
2
