Smartec S CLD134 Installation
Endress+Hauser 13
Wall distance
The sensor’s distance from the pipe wall affects the measuring accuracy (see Fig. 5).
a0005441
Fig. 5: Relationship between installation factor and distance from wall a
1 Electrically conductive pipe wall
2 Insulating pipe wall
In narrow installation conditions, the ion flow
in the medium is affected by the pipe walls.
This effect is compensated by the so-called
installation factor.
When the distance from the wall is sufficient,
i.e. a > 15 mm / 0.59", the installation factor
can be ignored (f = 1.00). When the wall
distance is lower, the installation factor
increases in the case of electrically insulating
pipes (f > 1) while it decreases for electrically
conductive pipes (f < 1); see Fig. 5.
The determination of the installation factor is
described in the chapter "Calibration".
a0005440
Fig. 4: Installation of CLD134
a Wall distance
1
2
a [inch]
0
5
10 15
20
2525
a [mm]
0.80
1.00
1.20
1.40
f
0.20
0.39
0.59
0.79
0.98
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