Appendix C
A-73
4.5 High Temperature Transducer Blocks
Optional high temperature blocks are available for applications with pipe temperatures
ranging from 300 to 470$F (150 to 243$C). The blocks are installed between the
transducer face and the pipe.
NOTE:
Do not use PolyGlide
™
sonic coupling compound in applications where
temperatures exceed 250°F (121°C).
To use the high temperature blocks:
1. Configure the instrument as usual and select
HI TEMP BLOCKS
as the transducer type
in Menu 23.
2. Apply a high temperature couplant (Dow Corning 111
®
or similar) to the face of the
transducers. (Silicon RTV may be substituted if a more permanent bond is desired.)
3. Press the face of the transducers to the blocks.
4. Apply high temperature couplant to the other side of the blocks.
The transducers are now ready to mount (Section 4.2).
4.6 Sonic Coupling Compound
Any voids or air gaps that exist in the sonic coupling compound between the transducers
and the pipe can attenuate the signal. PolyGlide
™
sonic coupling compound should be
protected from washout and replaced as required. Annual replacement is recommended for
most applications to maintain optimal performance.
To replace the PolyGlide
™
compound:
1. Remove the transducers from the pipe.
2. Clean the old compound from the transducers and the pipe.
3. Apply a wide bead of compound lengthwise down the center of the face of each
transducer.
4. Remount the transducers, verifying that the compound is squeezing out from
underneath all sides of the transducers and forming a bead along the edges.
To Next Page
Loading...
Need help?
General