7
UK
4 Functions and features
The unit continuously detects the level in tanks and generates output signals
according to the parameter settings�
2 switching outputs are available� They can be set separately�
4.1 Operation with single probe
The single probe is made up of one individual rod� Operation with single probe is
suited for the detection of aqueous media, in particular of heavily soiled aqueous
media�
For the correct function when used with single probe, the unit needs a
large enough metal launching plate� It is necessary for transferring the
microwave pulse to the tank with optimum transmission power�
The flange plates that are available as accessories are not sufficient as
launching plates (for suitable launching plates → 6.4).
For installation in closed metal tanks, the tank lid serves as a launching
plate� For installation in open metal tanks, tanks made of plastic or metal
tanks with plastic lids a sufficiently large fixing plate, a metal plate or
similar must be used (→ 6.4.3 / → 6.4.4).
For operation with single probe, minimum distances to tank walls, objects
in the tank, bottom of the tank and further level sensors must be adhered
to (→ 6.1.1).
4.2 Operation with coaxial probe
The coaxial probe is made up of an inner rod and an outer probe pipe
(coaxial pipe)� The rod is centred in the coaxial pipe by one or several spacers�
In case of operation with a coaxial probe media with a low dielectric constant
(e�g� oil and oil-based media) are detected in addition to aqueous media�
No launching plate is required for operation with coaxial probe�
Furthermore, no minimum distances to tank walls and objects in the tank
are required�
