Campbell Scientific ST350 Strain Transducer for Structural Testing - Manual (Page 26)

Section 7. Maintenance, Replacement Parts, and Repairs
FIGURE 7-2. Proper Connection to Data Acquisition System for Tension and Compression
Debris and glue removal from foam areas between transducer body and
lid:
This area should be cleared of any debris or glue. The easiest way to remove
any sort of obstruction from the foam area is by using a dental pick. Glue can
be chipped away and debris, such as sand, can be pulled to the surface and
wiped away. Extra care should be taken when removing glue as it is easy to
slip and damage the gage or cut your hand.
If the foam is damaged during the cleaning process, it cannot be
repaired or replaced! NOTE
Debris and glue removal from mounting feet:
This area should also be inspected and cleared of any debris and glue. To
remove glue from the feet, use the tip of a shop rag wetted with acetone. Wipe
the glue until it dissolves. A shop rag with mild soapy water can be used to
remove other debris from the mounting feet.
Mounting tab inspection:
These tabs have been design to be reusable by simply dissolving the glue with
acetone. Acetone can be reused multiple times, but if it becomes too saturated
with glue it will start leaving a thin layer of glue in the threads of the mounting
tabs. Also, sometimes when the mounting tabs are removed from a structure
the top threads can be chipped. If it becomes hard to thread nuts onto the
mounting tab stud, run a 1/4-20 tap down the threads to remove the chips and
glue from the threaded stud.
As stated in the previous sections, it is recommended each transducer be re-
calibrated on an annual to bi-annual basis or every 15-25 installations
depending on the care taken during the installation process.
7.2 Replacement Parts
In order to optimize the weather proofing of the transducer, it has been
designed to be completely sealed. Due to this design the only replacement part
available for the transducer is the cable. For the cable to be replaced, the
7-2