Baker Hughes Panametrics AquaTrans AT600, Руководство пользователя

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Chapter 2. Clamp-on fixture and transducer installation
14 AquaTrans™ AT600 User’s manual
5. See figure 17 and figure 18 below for examples of a completed installation in the following situations:
Note: In this drawing, LSL is the lower specified limit and USL is the upper specified limit for each fixture.
a.
For a calculated transducer spacing of 320 to 620 mm for a 1 MHz or 0.5 MHz transducer, locate the upstream
transducer at the USL1 position on the first fixture. Then, locate the downstream transducer at the calculated
transducer spacing position (≤USL2) on the second fixture.
Figure 17: Transducer spacing of 320 to 620 mm with two fixtures
b. For a calculated transducer spacing of 620 to 940 mm for a 1 MHz or 0.5 MHz transducer, locate the upstream
transducer at the LSL1 position on the first fixture. Then, locate the downstream transducer at the calculated
transducer spacing position (between LSL2 and USL2) on the second fixture.
Figure 18: Transducer spacing of 620 to 940 mm with two fixtures
6. Your clamp-on fixture and transducer installation is now complete. To wire your AT600 flow meter, proceed to
"Wiring the AT600 electronics" on page 19.
2.1.3 Transducer spacing = 0 to 250 mm or 0 to 320 mm, traverses = 1, fixtures = 2
For a one traverse installation with a calculated transducer spacing of 0 to 250 mm for a 2 MHz transducer or 0 to 320
mm for a 1 MHz or 0.5 MHz transducer, two clamp-on fixtures are installed on opposite sides of the pipe. To install this
configuration, complete the following steps:
1. Mark a straight line parallel to the pipe centerline on the top of the pipe (i.e., the 12 o’clock position).
2. Use a band tape to measure the circumference of the pipe. Then, mark two additional lines on the pipe parallel to
the first line. Locate these lines 1/4 of the way around the pipe in each direction from the original line (i.e., at the 3
o-clock and 9 o’clock positions).
3. Install two mounting straps on the pipe about 12 in. (30 cm) apart (see figure 19 below).
4. Hold one clamp-on fixture, with two transducers and one cable, on the pipe along one of the lines marked in step
2. Then, move the two straps onto the ends of this fixture.
5. Hold the remaining (empty) clamp-on fixture on the opposite side of the pipe from the first fixture. Then, move the
two straps onto the ends of this clamp-on fixture.
6. Align the two fixtures to be equal distances from the band tape. Tighten both straps securely.
LSL1 USL1
0 300 620
LSL2 USL2
DOWNSTREAM
Spacing
UPSTREAM
LSL1 USL1
0 320 620 940
LSL2 USL2
DOWNSTREAM
Spacing
UPSTREAM