ASSEMBLY OF THE PROBE
Adjusting dimension X
The adjusting dimension X is the distance between the
reference edge between the dome cover or screw-in unit and
the marking ring on the protective cover of the sensor at the
lower end of the probe.
Control dimension Y
The control dimension Y results from the difference between the
probe dimension Z and the adjusting dimension X. It represents
the distance between the upper marking line and the reference
edge of the dome cover or screw-in unit.
The probe is the part of the limit indicator that protrudes into the
tank in a height-adjustable manner, which has a sensor (PTC
thermistor as temperature-dependent PTC resistor) protected
on the bottom. Probe lengths from 150 to 1000mm are possible.
(Observe the tank permit!)
A marking line and a number
top of probe tube. The marking line and the value for Z must be
visible upon installation.
The number indicates the distance from the marking line to the
switching point
(marking at the bottom of the probe) in
millimetres. Probes with probe tube lengths Z = 500 to 1000mm:
The probe tube protruding from the tank is to be protected from
mechanical stress if necessary.
Insert the probe carefully and do not damage it!
The probe is height-adjustable. The probe may not
be shortened under any circumstances.
The probe must be installed according to the assembly and operating manual and be set to
the maximum of the permissible filling volume with permissible filling level – generally
≤ 95% (V/V) of the rated volume of the tank as well as according to the stipulations of the
building's certificate of suitability for intended use for tanks or tank systems in the case of
battery tanks made of plastics*.
If the filler line is longer than 20m, the adjusting dimension X is to be determined
according to the special conditions. If necessary, contact the tank manufacturer with a
specification of the special tank shape and size, as well as the length of the filler line.
The criterion in this case is the overrun volume in the filler line which may not lead to an
exceeding of the maximum permissible filling volume of 95% (V/V).
If no information regarding is available, the adjusting dimension X can be
determined by the volumetric measurement of the tank or by the calculation
according to the "Zulassungsgrundsätze für Überfüllsicherungen" of the DIBt
(see page 27).
The connection lines between the probe and the indicator may have a total length of a
maximum of 100m when a suitable cable with a cross-section of 2 x 1.5mm
Probe:
• if the probe is used outdoors, it must be protected with suitable means against penetrating
humidity (e.g. with shrinking tube attached)
pull the protection over the cable and approx. 1cm over the probe and shrink it. The
marking line and the value for Z must be visible
* less the overrun volume for the level sensor switching time of 3 seconds
26 / 133
have been embossed into the
BC-2
2
(Cu) is used.
Artikel-Nr. 15 707 50