Section 5. Mounting of Sensor to Various Surfaces
-
Tighten the washers against the concrete by twisting the nut with
an open-end wrench. It is important to set the stud before
attaching the extension to prevent damaging the gage. Once
secure, leave the nut on the bolt to hold the washers in place.
-
Apply adhesive to the tab and push unit to mounting location.
Pull back tab, leaving a patch of adhesive on the structure.
-
Apply accelerator to the adhesive, and quickly put assembly in
place. Hold the tab end of the unit in place by hand for several
seconds until the adhesive has hardened.
-
While holding the transducer assembly in place, screw a nut on
the stud and tighten with an open-end wrench.
c.
Threaded Studs Both Ends (1/4"-20 x 3-1/4” Powers Fasteners Power-
Stud or similar)
When using this method it is very important that the drilling of
the holes is accurate to + 1/8” in order to align properly with the
transducer mounting holes. To help drill holes accurately, a steel
drilling guide made for the particular extension length can be
fabricated.
NOTE
-
Locate the gauging point on the structure and make two marks
approximately 2 feet apart along the axis of where the
transducer/extension assembly is to be mounted. It can
sometimes be difficult to align the marks on the bottom of
concrete slab structures, particularly if the structure is skewed.
Often, a series of lines are laid out on the bottom of the slab using
a chalk line, making gage alignment very easy. Another
alternative is to use a laser chalk line to temporarily create a line
while the gage is installed.
-
Temporarily hold the transducer/extension assembly up to where
it is to be mounted to ensure that there are no obstructions along
the length of the unit. Make small marks at the two mounting
points, one for the transducer end and one for the selected gage
length on the extension end (6-24inches).
-
Using a concrete drill, drill the first of two 1/4” hole about 1.75”
deep.
-
Place two to three washers on the stud and thread on a bolt about
1/2 of the way down the stud. Slide a 3/8” deep wall socket over
the stud and hold it against the nut. Drive the stud into the
concrete by pounding on the end of the socket; this will help
prevent bending the stud.
-
Tighten the washers against the concrete by twisting the nut with
an open end wrench. It is important to set the studs before
attaching the extension to prevent damaging the gage. Once
secure, leave the nut on the bolt to hold the washers in place.
5-4
Summary of Contents for ST350
Page 6: ...Section 1 Introduction 1 2...
Page 8: ...Section 2 Specifications 2 2...
Page 12: ...Section 3 Sensor Alignment and Installation 3 4...
Page 22: ...Section 5 Mounting of Sensor to Various Surfaces 5 8...
Page 24: ...Section 6 Calibration and Validation 6 2...
Page 28: ...Section 7 Maintenance Replacement Parts and Repairs 7 4...
Page 32: ...Section 8 Datalogger Programming 8 4...
Page 44: ...Appendix B ST350 Accuracy Verification B 6...
Page 49: ...This is a blank page...