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10 | GAUGE INSTALLATION | GEOKON
Using the test material provided with the gauges, run a series of tests to
determine the correct weld energy. When the correct weld energy is used, the
test strip will show a series of holes where the welded strip has been left behind
on the substrate when peeled back from the steel surface with pliers, as shown
below.
FIGURE 10: Peel Test
If insufficient weld energy is used, the test strip will pull loose without holes
being torn in it. If excessive weld energy is used, the test strip will discolor, melt,
and be ejected away from the spot. Sparking is usually an indication of dirt
between the test strip and the substrate. It may also be an indication of
insufficient force, in which case the force setting of the hand probe should be
adjusted. Excessive deformation of the weld area calls for either a decrease of
the force applied by the hand probe and/or a decrease of weld energy.
4.2.3 SPOT WELDING THE 4100 GAUGE
Spot weld one end of the gauge by placing a weld point at each of the marked
dots on the mounting tab, in the sequence shown below. Once that is complete,
weld the second mounting tab using instructions in Section 4.2.5.
1
Start
2
FIGURE 11: Spot Welding Sequence, Outer Rows
4.2.4 SPOT WELDING THE 4150 GAUGE
Spot weld the end of the gauge where the cable comes out by placing a weld
point at each of the marked dots on the mounting tab in the sequence shown
below. Carefully move the lead wires out of the way before beginning.
1
Start
2
FIGURE 12: Spot welding Sequence, Outer Rows
Test Holes
Substrate
3
4
3
4
10:
Test Strip
Strip Material
11:
12:
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