Baker Hughes Panametrics AquaTrans AT600, User Manual

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AquaTrans™ AT600 User’s manual 13
Chapter 2. Clamp-on fixture and transducer installation
2.1.2 Transducer spacing = 320 to 940 mm, traverses = 2, fixtures = 2
For a two traverse installation with a calculated transducer spacing of 320 to 940 mm for a 1 MHz or 0.5 MHz
transducer, two fixtures are installed on the same side of the pipe. To do so, complete the following steps:
1. Install the four mounting straps on the pipe with a spacing of 12 in. (30 cm) between each pair of straps.
2. Hold one of the clamp-on fixtures, with two transducers and one cable, against the pipe between the upstream
pair of straps and move the two mounting straps onto the fixture (see figure 15 below). Then, tighten the screws on
the mounting straps, and verify that the straps remain in place on the fixture.
Figure 15: Two traverse installation with two clamp-on fixtures
3. Repeat step 2 to install the second clamping fixture, with no transducers or cable, on the pipe between the
downstream pair of straps. Use the bar on the second fixture to connect the two fixtures. Then, move the straps
onto the second fixture and tighten the screws.
IMPORTANT: Be sure the bar on the left side of the second fixture is in close contact with the bar on the first fixture.
4. Set the spacing between the two transducers in the upstream clamping fixture to the value calculated by the
meter and tighten them back onto the pipe, as follows:
a.
Rotate the fixture so that the transducers are in view (see Figure 12 on page 12).
b. Remove the downstream transducer from thefirst fixture (see figure 16 below), disconnect the transducer
cable, and route the cable into the second fixture. Then, install the downstream transducer into the second
fixture and reconnect the transducer cable. If you are using solid couplant, apply it to both transducer faces.
Then, rotate the transducers back onto the rail.
Figure 16: Moving the downstream transducer
IMPORTANT: Tight contact must be made between the bars on the two fixtures to ensure an accurate spacing.
Bar
UPSTREAM
DOWNSTREAM