Dynasonics DXN Portable Ultrasonic Measurement System - Manual (Page 46)

Pipe OD (Numeric Value)
Next enter the Pipe OD (outside diameter).
Enter the pipe outside diameter in inches if English was selected as the Entry Units; in millimeters if Metric was selected.
NOTE: N Charts listing popular pipe sizes have been included in the Appendix of this manual. Correct entries for pipe O.D. and
pipe wall thickness are critical to obtaining accurate flow measurement readings.
Pipe Wall [Thickness] (Numeric Value)
The Pipe Wall thickness is the value of the actual pipe wall thickness excluding any liner that may be present.
NOTE: N
Accurate values for Pipe OD and Pipe Wall thickness are necessary for accurate computation of the volumetric flow
rate. Without accurate pipe 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 OD and/or pipe wall thickness values.
Pipe Wall Thickness Gauge
Automatic Use
NOTE: N
There are two different "reference" measurement methods required depending on the type of pipe being used. With
Tubing the reference is checked with the transducer ON pipe, for all other pipe types the reference is set with the
transducer OFF the pipe.
NOTE: N
Pipe thickness transducer must be applied Perpendicular to the long axis of the pipe/tube (See Figure 64 ).
1. Make sure Site>Lookup>Schedule is set to “Use Manual Entry” as in Figure 60 .
Site Name 0.00 GPM
1/16/2013
2:18 PM
Meter Adv Cal System Display Site Log I/O
Create Liner Transit Doppler Fluid Pipe Lookup
Pipe Material Aluminum
Schedule
Nominal Size (in)
Liner Type Use Manual Entry
Use Manual Entry
Use Manual Entry
Figure 60: Site>Lookup - Schedule Manual Entry Selected
2. In the Site>Pipe screen make sure that the Pipe Material and Pipe OD have been entered as in Figure 61 .
3. The pipe wall thickness gauge uses the same input connectors as the transit time ultrasonic transducers. The
thickness gauge has two BNC connectors with red and blue markings. Connect the pipe wall thickness transducer to
the DXN matching the red and blue BNC plugs to the red and blue transit time inputs.
DXN Portable Ultrasonic Measurement System
Page 46 February 2013