Indumax CLS54
Installation
Hauser
13
4.1.2
Installation factor
The ionic current in the liquid is affected by the walls in
confined installation conditions. This effect is compensated
by what is referred to as the installation factor. The
installation factor can be entered in the transmitter for the
measurement or the cell constant is corrected by multiplying
by the installation factor.
The value of the installation factor depends on the diameter
and the conductivity of the pipe nozzle as well as the
distance a between the sensor and the wall.
The installation factor f (f = 1.00) can be disregarded if the
distance to the wall is sufficient (a > 15 mm, from DN 65).
If the distance to the wall is smaller, the installation factor
increases for electrically insulating pipes (f > 1), and
decreases for electrically conductive pipes (f < 1).
It can be measured using calibration solutions, or a close
approximation can be determined from the diagram below.
a
A0032680
2
Installation CLS54
a
Wall distance
1
2
a [inch]
0
5
10
15
20
25
25
a [mm]
0.80
1.00
1.20
1.40
f
0.20
0.39
0.59
0.79
0.98
A0005441
3
Relationship between installation factor f and wall distance a
1
Electrically conductive pipe wall
2
Electrically insulating pipe wall
4.1.3
Air set
To compensate residual coupling in the cable and between the two sensor coils, zero
adjustment in air ("air set") must be performed before installing the sensor. Follow the
instructions provided in the Operating Instructions of the transmitter used.
