Pag. 19 of 52
- Transducers positioning
9. TRANSDUCERS POSITIONING
9.1 Positioning type Selecting
The transducers positioning type selection,
Z-Mode,
or
V-Mode
or
W-Mode
, is a function of measuring pipe DN:
DN20÷50
- recommended installation:
W (small pipe)
DN50÷250 - recommended installation:
V
DN250÷4000 - recommended installation:
Z
9.2 Marking positioning
After the pipe parameters and transducers positioning type programming, the conversion unit automatically calculates
the mounting axial distance between the two transducers:
M25
,
Transducer Spacing
.
The
M25
value is used to mark out on the pipe the exact transducers positioning .
9.3 Marking tools
To trace on the pipe surface the transducers positioning points are sufficient simple tools, but effective at the same time:
- a paper roll piece (like that calculators) with a width greater than the pipe circumference, or a piece of continuous
form for printer according to the pipe diameter.
- a pencil or a thin tip pen
- a meter
Pencil
Thin tip pen
Meter
paper roll for
calculators
Continuous form
for printer
9.3 Marking modes
9.3.1 - Z mounting mode
For the transducers correct positioning, proceed as follows:
1) wrapping the pipe with the paper roll, or with the continuous form, making sure that the edges are perfectly
superimposed between them. With the pencil, or with the thin tip pen, draw the “
r
” circle on the pipe and, at the
same time, draw on the paper roll, the circumference measuring point.
Fig. 34
Fig. 35
