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Appendix B. Measuring P and L Dimensions
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 239
Appendix B. Measuring P and L Dimensions
If you are using wetted transducers, the PT878 requires you to enter the path
length (P) and the axial dimension (L). P is the transducer face-to-face
distance, and L is the axial projection of P in the flow stream.
To determine L, physically measure the distance between the center of the
transducer ports at the inside wall as shown in Figure 154 below, if possible.
If not, consult the factory.
Figure 154: Top View of 180° Transducer Installation
θ
Pipe Thickness
Pipe O.D.
P
L