Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 20)

Rev. 8/02
- 2.5 - TFXM
*If the liquid to be measured is high in TSS (total suspended solids) or aerated, more than
likely the installation will require configuration and setup in the next category lower than the
recommendations in this chart. For example, if the pipe is 10-inch (250 mm) carbon steel
and the liquid contains concentrations of suspended solids, a Z-mode will probably yield
the best performance results, not the V-mode suggested in the chart.
Transducer Mount
Mode Pipe Material Pipe Size Liquid Composition*
W-mode
(Weakest signal,
longest time of
flight) Plastic (all types)
Carbon Steel
Stainless Steel
Copper
Ductile Iron
Cast Iron 2-6 in. (50-150 mm)
2-4 in. (50-100 mm)
2-6 in. (50-150 mm)
2-6 in. (50-150 mm)
Not recommended
Not recommended Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
V-mode Plastic (all types)
Carbon Steel
Stainless Steel
Copper
Ductile Iron
Cast Iron 6-30 in. (150-750 mm)
4-24 in. (100-600 mm)
6-30 in. (150-750 mm)
6-30 in. (150-750 mm)
3-12 in. (75-300 mm)
3-6 in. (75-150 mm) Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Z-mode
(Strongest signal,
shortest time of
flight) Plastic (all types)
Carbon Steel
Stainless Steel
Copper
Ductile Iron
Cast Iron >30 in. (>750 mm)
>24 in. (>600 mm)
>30 in. (>750 mm)
>30 in. (>750 mm)
>12 in. (>300 mm)
>6 in. (>150 mm) Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Low TSS, non-aerated
Table 2.2
Initial Transducer Mounting Modes
PART 2 - TRANSDUCER POSITIONING