TF1100-EC/EI Manual
7
Piping configuration
And transducer
position
Upstream
Dimension
Downstream
Dimension
Pipe Diameters
（
*
）
Pipe
Diameters
（
**
）
10
5
14 5
24 5
30 5
10 5
24 10
Table 2.1 Straight Pipe Requirement
2.3 TRANSDUCER SPACING
TF1100 transducers are clamped on the outside of a closed pipe
at a specific distance from
each other
. The transducers can be mounted in V-mode where the sound transverses the
pipe two times, W-mode where the sound transverses the pipe four times, or in Z-mode
where the transducers are mounted on opposite sides of the pipe and the sound crosses the
pipe once. For further details, reference pictures located under
Table 2.2
. The appropriate
mounting configuration is based on pipe and liquid characteristics. Selection of the proper
transducer mounting method is not entirely predictable and many times is an iterative
process.
Table 2.2
contains recommended mounting configurations for common
applications. These recommended configurations may need to be modified for specific
applications if such things as aeration, suspended solids or poor piping conditions are
present. W-mode provides the longest sound path length between the transducers - but the
weakest signal strength. Z-mode provides the strongest signal strength - but has the shortest
sound path length. On pipes smaller than 75 mm, it is desirable to have a longer sound
path length, so that the differential time can be measured more accurately.
