Campbell Scientific ST350 Strain Transducer for Structural Testing - Manual (Page 35)

Appendix A. Special Instructions for using ST350
4. Using an extension jig as seen in FIGURE A-1, insert a tab into slot. Set
the transducer over the tab into the transducer hole closest to the cable exit
and loosely thread on a nut.
FIGURE A-1. Extension Jig
FIGURE A-2. Drawing Extension Jig
1. There is a machined hole in the non-cabled end of the transducer that will
capture a standard ¼ 20 hex head bolt (see FIGURE A-3). Simply insert
the bolt through the bottom of the transducer and twist until the bolt head
drops into the hole. There is a relief cut in the back of the extension to
accept the protrusion on top of the gage. This will ensure that the gage is
positioned correctly.
2. Hold the bolt in place and slide the extension over the extension bolt and
thread on a nut. Tighten the nut to approximately 50 in-lbs.
3. Gently compress the assembly to the tab end of the jig as seen in FIGURE
A-3. Once the transducer is pressed against the two pegs at the cable exit
end, tighten the tab nut to approximately 50 in-lbs.
4. If using the tab-adhesive system on both ends of the assembly, install a tab
into the desired hole on the extension. Note that each hole in the extension
has a number ranging between 6 and 24 inches. These numbers are the
gage lengths for each designated hole. For example, if the hole farthest
A-3