MODEL 4420 VIBRATING WIRE CRACKMETER
| INSTALLATION |
5
2.
Using a hammer drill (or other suitable equipment), drill two half-inch
diameter holes approximately three inches deep at the proper locations.
Shorter holes may be drilled if the anchors are cut down accordingly.
3.
Push the cap screws through the swivel bearings and spacers on each end
of the crackmeter and then loosely thread them into the groutable anchors.
4.
For midrange position installations, secure the transducer shaft in place by
leaving the PVC slotted sleeve or dowel pin installed.
5.
Fill the holes three quarters full with grout or epoxy. For holes drilled
overhead use a quick setting grout or epoxy.
6.
Push and twist the anchors in until the tops are flush with the surface. Wipe
any excess epoxy clear of the tops of the anchors.
7.
After the grout or epoxy has set, install and tighten the set screws.
8.
Remove the PVC slotted sleeve or dowel pin if it was not removed earlier.
9.
Check and record the reading with a portable readout. Use Table 2 to check
and adjust the position as needed.
2.2.4 INSTALLATION USING EXPANSION ANCHORS
6:
FIGURE 6:
Installation using Expansion Anchors
INSTALLATION INSTRUCTIONS:
1.
Determine the proper setting distance using the spacings listed in Table 1.
2.
Using a masonry drill (or other suitable equipment), drill two 10 mm (3/8")
diameter holes, 32 mm (1.25") deep at the proper locations.
3.
Insert the expansion anchors into the holes, with the slotted end down.
4.
Insert the setting tool into the anchor, small end first. Expand the anchor by
hitting the large end of the setting tool with several sharp hammer blows.
5.
Remove the PVC slotted sleeve or dowel pin securing the transducer shaft.
6.
Push the cap screws through the swivel bearings and spacers on each end
of the crackmeter and then tighten the cap screws into the anchors.
7.
Check and record the reading with a portable readout. Use Table 2 to check
and adjust the position as needed.
2.3
SPECIAL INSTALLATION NOTE
Regarding Models 4420-1-3 mm (.125"), 4420-1-12.5 mm (.5"), and 4420-1-25
mm (1"), please keep the following in mind:
■
If the reading is not in the proper range after installation, make adjustments
using the threaded extension at the end of the transducer shaft.
■
To make accurate adjustments, attach the transducer to the anchor at the
cable end, and temporarily remove it from the opposite anchor.