ABB UAD154A programmable control module
CAUTIONDuring this operation it is possible to over load the load cells if the operation is done not careful
enough, especially if the roll is heavy.
The most critical load cells are naturally the PFTL 101A-0.5 kN and PFTL 101B-2 kN.
Applications with inclined mounting are most critical.
6. Adjust the load cells so that they are in parallel with each other and in line with the axial direction
of the roll. Tighten the foundation screws, see Figure 15. Installation of Adapter Plates and Align ment of Load Cells page 21.
7. Adjust the roll so that it is at right angles to the longitudinal direction of the load cells.Tighten the
screws in the upper adapter plate, see Figure 15. Installation of Adapter Plates and Alignment of
Load Cells page 21.
Table 2 Tightening Torques for Load Cell PFTL 101
Option Type of screws Strength
class
Type of
lubrication
Dimension Tightening
torque
[Nm] ± 5%
1
(Recommended)
Alloyed steel
screws
Strength class
according to ISO
898/1
12.9 Oil M12 136
M16 333
M20 649
2
(Recommended)
Alloyed steel
screws
Strength class
according to ISO
898/1
12,9 MoS2 M12 117
M16 286
M20 558
3 Stainless steel
(A2-80)
or acid resistant
steel (A4-80),
Strength class
according to ISO
3506
A2-80
or
A4-80
Wax M12 76
M16 187
M20 364
4 Stainless steel
(A2-80)
or acid resistant
steel (A4-80),
Strength class
according to ISO
3506
A2-80
or
A4-80
Oil
or
emulsion
M12 65
M16 161
M20 313

General
The actual procedure for commissioning a load cell is simple, provided that the load cells and
cables have been properly installed. Commissioning of the control unit is described in the relevant
chapter of the control unit manual.
Check the following:
• that the load cells have been correctly installed and aligned
• that all screws have been tightened to the correct torque
• that all cables are correctly installed and connected
• that all connectors are plugged in
4.2 Preparatory Calculations
To be able to set the correct measuring range, the measurement force per load cell FR/2 at maxi
mum tension T must be calculated. Each load cell is subjected to half the total measurement force
FR. This calculation must be done before commissioning can begin. Calculation of FR is described
in 2.5 Mounting Arrangement.
General
Web/strip Tensiometer Systems with Pressductor® load cells are extremely reliable and do not
require daily servicing. As a preventive measure, checks should be done periodically on all parts
subject to mechanical wear.