CiDRA SONARtrac PW VF-100 - Manual (Page 62)

20831-01 Rev 05 Page 5-44
5.9 Installations on Tubing
The sensor head will fit on process tubing as well as pipe. This is
accomplished through the use of a sensor band specifically sized for
tubing and the use of elastomer strips wrapped around the tube (in
order to increase the tube diameter to that of pipe) in the areas of the
pipe seal gaskets on the fiberglass cover.
WARNING
EXPLOSION HAZARD – The ATEX Zone 2 approval applies to
Sensor Heads with integral gaskets sized to fit the pipe. Zone 2
certification prohibits the use of elastomer strips. Contact
Customer Support about whether an ATEX Zone 2 solution
exists for a particular tubing diameter.
A sensor band specifically sized for use on tube must be ordered (the
overall length of the tube-sized sensor band will be shorter than a pipe
sized band due to the difference in outside diameter of a specific size
tube vs. pipe).
Installation is as follows:
1. Clean the tube where the sensor head will be installed. The
overall clean length should be at least 36 inches (76 cm).
2. Measure the distance between the inside edges of the sensor
cover end seals and mark this distance on the tube.
3. Install the elastomer strips such that the in-board edges of them
align with the marks on the tube, and the paper covered adhesive
strips will contact the tube.
a. Remove the paper strips covering the adhesive.
b. Wrap the elastomer strip 3/4
ths
of the way around the pipe.
Pull it taut so it lies smoothly and evenly on the pipe.
c. Apply a bead of the Teflon sealant (provided for the cover
gaskets with bolted cover assemblies) along the seam at the
starting edge of the elastomer strip.
d. Continue to wrap the elastomer strip overlapping the previous
layer.
e. Once the wrap is complete, apply a bead of the Teflon sealant
along the seam.
f. Install the second strip per the above steps.
4. Continue with installation of sensor head as previously described
in the manual.