Panametrics CTF878, Руководство для стартапов

Страница: 22 / 108

Chapter 2.
14 Model CTF878 Startup Guide
Positioning the Yokes
The CFT-V clamping fixture yokes are usually set in place at the factory, based on the information given at the time of
the order. If it becomes necessary to reposition the yokes, proceed as follows:
1. Referring to Figure 4 below, set the first yoke at a short distance from the end bracket and tighten the yoke screw.
2. Using calipers, set the opposite yoke at a distance S from the opposite bracket and tighten the yoke screws.
Note: Distance
S
is equal to the distance of the first yoke from the end bracket plus the transducer spacing (see
Setting the Transducer Spacing and
TAG
path
on page 11).
3. Set the
TAG
path one side at a time and tighten the yoke screws before repeating this step for the other side.
.
Figure 4: CFT-V Clamping Fixture Setup
2.1.7.3 Mounting the CFT-V Clamping Fixture
Refer to Figure 4 on page 14 and mount the CFT-V clamping fixture on the pipe.
IMPORTANT: The measurement plane (the plane formed by the four transducers) should be horizontal or as close to
horizontal as possible.
1. Place the clamping fixture on the pipe so that the brackets rest in the two gaps between the strips of damping
material.
TAG path
Transducer
Yoke Screw
Yoke
Slider
Bracket
Threaded
Rod
Bracket
Nut
Parts are typical.
Clamping Fixture is
shown from the top.
Rail
Spacing
TAG path
S
R