GOK BC-1 Notice De Montage Et De Service page 22

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
embossed into the 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
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 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. In case of tanks which are filled via an automatically closing
discharge valve, the filling is to be ended when an optical and acoustic alarm of the BC-1 is
given. In case of tanks/plants with installed signalling and control devices as well as signal
amplifiers as an overfill sensor, the following must be observed:
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 7).
The connection lines between the probe and the indicator may have a total length of a
maximum of 200m when a suitable cable with a cross-section of 2 x 1.5mm
6 / 16
Overfill prevention divice type BC-1
have been
(marking at
The probe is height-adjustable.
The probe may not be
shortened under any
circumstances.
2
(Cu) is used.