Dynasonics DXN Portable Ultrasonic Measurement System User Manual
Page 52
Liner Material - (Choice)
Choose the pipe liner material from the combo box drop-down.
The following list is provided as an example. Additional materials are added periodically. Select the appropriate material from
the list or select Other if the liner material is not listed.
None
Mortar
Polystyrene
Acrylic
HD Polyethylene
Rubber
Asbestos Cement
LD Polyethylene
Tar Epoxy
Ebonite
Polypropylene
Teflon® (PFE)
Table 11: Liner Material Choices
If a liner was chosen from the Liner Material list, a nominal value for speed of sound and pipe roughness in that media will be
automatically loaded. If the actual sound speed rate or roughness is known for the pipe liner and that value varies from the
automatically loaded values, these values can be revised.
Liner Wall [Thickness] - (Numeric Value)
Enter the liner wall thickness in inches if English is selected as Entry Units; in millimeters if Metric is selected.
NOTE:
N
if a liner is present an accurate value for Liner Wall thickness is necessary for accurate computation of the volumetric
flow rate. Without accurate liner data flow rates will be in error by the difference between the actual pipe cross
sectional area and the area calculated using the incorrect pipe liner thickness.
[Liner] Roughness - (Numeric Value in Micro Feet)
If a liner material was chosen from the Liner Material list, a nominal value for relative roughness in that material will be
automatically loaded. If the actual roughness is known for the application liner and that value varies from the automatically
loaded value, the value can be revised.
Liner Sound Speed - (Numeric Value)
Allows adjustments to be made to the speed of sound value, shear or transverse wave, for the pipe wall. If the Entry Units
value was set to English:, the entry is in FPS (feet per second). Metric entries are made in MPS (meters per second).
If Other was chosen from the Liner Material list a Liner Sound Speed control will become available at the bottom of the liner
page. If the Entry Units are in English the Liner Sound Speed is entered in FPS. For Metric units the liner sound speed is in MPS.
DXN Portable Ultrasonic Measurement System
Page 52
February 2013