Smartec CLD134

Endress+Hauser

9

Installation

Installation instructions

For a 3-A compliant installation, the following must be noted:

After the instrument is installed its hygienic integrity shall be maintained. All process

connections must be 3-A compliant.

The sensor must be completely immersed in the medium. Avoid air bubbles in the area of the sensor.

A0017691

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Orientation of conductivity sensors

If the flow direction changes (after pipe bends), turbulence in the medium can result. Install the

sensor at a distance of at least 1 m (3.3 ft) downstream from a pipe bend.

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 can be disregarded (f = 1.00) 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.

A0005440

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Installation of

CLD134

a

Wall distance