Transducer Spacing = 320 To 940 Mm, Traverses = 2, Fixtures = 2 - GE AquaTrans AT600 User Manual

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.
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 the first 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
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Figure 15: 2 Traverse Installation with 2 Clamp-On Fixtures
Bar
AquaTrans™ AT600 User's Manual