Dew formation
Dew formation and splashes do not damage the sensor, although measurement readings are cor-
rupted until all moisture on and around the sensing element has dried up completely.
Contaminated filters
If the PTFE sintered filter ZE05 and the membrane filter ZE08 is contaminated with dust, grease and
oils, this can have a negative impact on the dynamic behaviour of the sensor.
Cleaning of filters
If necessary, soiled filters and protective baskets can be screwed off and rinsed carefully. Bear in
mind the sensors wil not measure accurately until filters are completely dry. Please do not touch the
highly sensitive sensing element.
Cleaning of
sensor chip
Loose dust can be carefully cleaned off the humidity sensing element using distilled water or by
blowing the dust carefully off. Please do not touch the highly sensitive humidity sensing element.
Damaging influences
Depending on their type and concentration, aggressive media containing solvents can cause incorrect
readings or cause the sensor to fail.
Substances deposited on the sensor element (e.g. fats, oils, resin aerosols, paint aerosols, smoke
deposits etc.) are harmful as they eventually form a water-repellent film or deteriorate the
dynamic
behaviour of the sensor.
Mounting and user information
Position
Install the sensor at a place where characteristic levels of humidity occur. The sensor tube resp.
measuring head or measuring chamber should be exposed to the flow of air. Avoid installation next
to heaters, doors or on outer walls. Avoid places exposed to the sun. Not reaching the given mini-
mum air speed can lead to measurement errors.
The sensors for wall mounting (series LW) can be mounted on a patress or directly on the wall.
It is important that the surface is even.
When mounting the sensors on a patress, avoid external air getting onto the humidity measuring
element of the sensor by sealing it appropriately.
The sensor should be mounted in such a way that no water can get into it.
To close the housing the screw is tightened until it stops.
We recommend that you lay the connection lines in a loop so that any water that may be present
can run off.
Fixing flange
For mounting the fixing flange (duct mounting of series LK), a hole pattern is printed on the packa
-
ging.
To fix the sensor, simply open the opening tab of the flange by finger pressure or with the help of a
pair of pliars. The sensor can be fixed in the flange at any position.
Connection
The electrical connection must be carried out by qualified personnel only.
The sensors of the L Series
contain components, which can be damaged by the effects of electrical fields or by charge equalisation
when touched. When mounting the sensor, protective measures must be taken.
Lines to and from the sensor must not be installed parallel to strong electromagnetical fields.
In the case of a possible overvoltage please install surge protection devices.
