Dynasonics DDFXD Doppler Ultrasonic Flow Meter User Manual
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14
06-DPP-UM-00147 02/12
Select a transducer mounting location with adequate straight runs of pipe, both upstream and down-
stream, to achieve stable readings
1
. Examples of minimum upstream and downstream requirements are
included in Figure 2.2.
*
**
Flow
*
**
Flow
*
**
Flow
*
**
Flow
Flow
*
**
Flow
*
**
24
24
14
10
10
10
5
5
5
5
5
5
*
**
Upstream
Pipe
Diameters
Downstream
Pipe
Diameters
Piping Configuration
and Transducer Positioning
FIGURE 2.2 - UPSTREAM/DOWNSTREAM PIPE REQUIREMENTS
1
The DFX system will provide repeatable measurements on piping systems that do not meet these
requirements, but the accuracy may be influenced to various degrees.