LINK Systems 5100-8 Tonnage & Analog Signal Monitor - Manual (Page 61)

Doc #: L-802-1110 Page 59 Rev. 02
4) Assemble the intermediate pads to
the alignment/clamping fixture
using the 1/4 x 28 bolts provided,
as shown in Figure 34.
5) Hold the alignment/clamping
fixture firmly on the mounting area
in the direction of tension or
compression of the structural
member or, alternatively, drill a
5/8" deep hole through the center
hole of the alignment/clamping
fixture, tap for 1/4 x 28 threads,
and bolt the alignment/clamping
fixture to the mounting area
through the center hole. Tack weld
both sides of each intermediate pad
to the mounting surface first, then
continuously weld the outer ends and sides
of the intermediate pads to the mounting
surface, as shown in Figure 35.
Weld
Pads
Weld Pad
Fixture
Weld
Pads
Weld Pad
Fixture
Figure 34: Weld Pad Mounting Fixture
Continuous Weld
On Three Outer
Edges of Both
Weld Pads.
(Do Not Weld
Inner Edges, Do
Not Weld With
Fixture Removed) Continuous Weld
On Three Outer
Edges of Both
Weld Pads.
(Do Not Weld
Inner Edges, Do
Not Weld With
Fixture Removed)
6) Remove the alignment/clamping fixture.
Do not weld with the fixture removed.
7) Bolt the LST-1000 strain gage to the pre-
tapped holes in the intermediate pads.
Make certain that the washers provided
with the strain gage kit are placed over the
strain gages, not under them. Torque the
1/4 x 28 bolts to 150 in-lbs. A calibrated
torque wrench is the preferred tool to
torque the bolts.
Figure 35: Weld Pad Welding Technique
8) Mount the protective cover box provided in the strain gage kit, if used, centrally over the strain
gage. It is important to mount the cover box before calibration begins. The cover box mounting
holes may slightly change the strain sensed by the strain gage.
6.8 Strain Gage Wiring
1) Run flexible or rigid conduit from the strain gage protective boxes to the enclosure that contains
the tonnage monitor. Entry into the enclosure should be as close as possible to the tonnage
monitor module.
2) Pull the strain gage cables through the conduit from the strain gage locations to the enclosure.
Once inside the enclosure route the strain gage cables away from all other voltage sources as