Inserting The Bwt Transducer - Panametrics BWT System Installation Manual

Chapter 2. Standard Installation (FTPA Buffers)
2.5.2

Inserting the BWT Transducer

Please read the following steps completely before beginning the installation of the BWT transducer.
IMPORTANT: After you install the BWT transducers, you must allow the epoxy to cure for eight hours.
Note:
In gas applications, the typical minimum pressure should be 5 barg (75 psig) for the transducers to receive
any signal. A pressure higher than this minimum should result in a better signal-to-noise ratio.
1. As shown below, place a small droplet (2 mm in diameter) of 3M Epoxy or equivalent on the center of the
transducer face (the picture below shows the transducer without the junction box ).
2. Screw the transducer/junction box into the fitting at the end of the FTPA Buffer. When you begin to feel some
resistance, stop turning the transducer and wait 5 seconds to give the couplant a chance to spread out.
IMPORTANT: In the next step, DO NOT overtighten the transducer.
3. Torque the transducer to a maximum of 15-18 ft-lb (20- 25 N-m).
4. Verify that the junction box is properly oriented as discussed in the previous section (see page 17 ).
To connect the transducer electrical cables, see the Startup or User's Manual that was supplied with your
5.
flowmeter.
18 BWT™ System Installation Guide