The Double-Traverse Method -Ucf - GE CModel C-RS Installation Manual

5.3 The Double-Traverse Method -UCF

Note: The instructions in this section can also be used for a multiple-traverse method. However, you must use an
EVEN number of traverses. Consult the factory for details.
There are three advantages to using the double-traverse method:
•
Accuracy is improved because the signal is in contact with the fluid longer than with a single-traverse method
•
This configuration can reduce some effect of an underdeveloped flow profile.
•
If there is enough pipe length available, the double-traverse fixture is easier to install.
Note: You will only need the short block assembly for a double-traverse installation. The long block is not used.
To install a double-traverse UCF, complete the following steps:
1. Obtain the transducer spacing dimension, as described in your flowmeter User's Manual.
2. Be sure the location you have chosen for the installation has a straight pipe and undisturbed flow for at least 10
pipe diameters upstream and 5 pipe diameters downstream from the flow measurement point.
3. Prepare the pipe where you intend to place the clamping fixture by making sure it is clean and free of loose
material. Sanding, though usually not required, may be necessary to remove any high spots on the pipe. When
sanding, be careful to preserve the original curvature of the pipe.
8 C-RS Ultrasonic Flow Transducer Installation Guide