Indumax CLS52

6

Endress+Hauser

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 = 1.0) 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

adjacent diagram.

0.80

1.00

1.20

1.40

10

20

30

40

f

a [mm]

1

2

0.39

0.79

1.18

1.57

a [inch]

A0028359

 5

Relationship between installation factor f and wall distance a

1

Conductive pipe

2

Insulating pipe

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.

Environment

Ambient temperature range

-10 to +70 °C (+10 to +160 °F)

Storage temperature

-25 to +80 °C (-13 to +176 °F)

Humidity

5 to 95 %

Degree of protection

IP 67 / NEMA 6