Panametrics C-RL, Инструкция по эксплуатации

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Model C-RL Installation Guide 35
4.5.7 Mounting the Transducers
To mount the transducers, proceed as follows:
• If your installation requires junction boxes, begin with step 1 below.
• If your installation does not require junction boxes, begin with step 3 below.
Note:
For clarity, the dampening material is not shown in the following illustrations.
1. Apply a thread sealant to the transducer threads. A thread sealant is not required within the United States, but it
is required to maintain ATEX certification for the installation.
2. Before mounting the transducers, thread the junction box onto the transducer, and tighten it with a wrench to a
torque of 40 lb-ft (54 N-m). Be sure to orient the cover of the junction box so it is accessible to make cable
connections after the box is installed.
3. Apply a bead of couplant 0.25 in. (6 mm) wide along the entire length of each transducer face, as shown below.
The purpose of the couplant is to prevent an air gap between the transducer and the pipe. The air in such a gap
would attenuate transducer signal.
IMPORTANT: To prevent the loss of couplant, do not slide the transducer face with the couplant bead along the
surface of the pipe when mounting the transducer.
4. Proceed as follows:
•
If you are using couplant CPL-1, CPL-2 or CPL-3, proceed to step 5 on the next page.
• If you are using couplant CPL-16, proceed to step 7 on the next page.
5. Insert the transducers into the mounting blocks, making sure the BNC connectors (or junction boxes) point away
from the center of the fixture (see the figure below). Tighten the pressure bolts by hand just enough to bring the
transducers into contact with the pipe surface and to hold the transducers in place.
IMPORTANT: Do not use a wrench or pliers on the pressure bolts.