Tecfluid LD61R - Manual (Page 5)

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In the same way, when the switch is installed where there is flow, the position must be
taken into account. The flat part of the tines must be aligned parallel with the flow direction
as shown in figure 1.
If the viscosity is high, the tines must be kept away from other objects (such as the wall of
the tank). In these cases it is preferable to install a longer detector (figure 2).
It is recommended that the cables go downwards from the cable glands .
4. ELECTRICAL CONNECTION
For the electrical connection, the LD61R has a screw terminal strip.
For the electrical installation it is recommended to use multiple conductor cables with
individual cable sections in the order of 0.25 to 0.5 mm
2 in order to make it easier to
connect. It is better to maintain the cables with mains voltage (power supply) separated
from the cables with low level signals.
Before starting the installation, check that the cable glands are the right size for the cables
to be used, this will guarantee the instrument will stay watertight. The PG11 cable glands
used are for cables with outside diameters between 6 mm and 10 mm.
Peel the outside insulation to free the inner cables. It is recommended to tin the ends of
the wires to avoid loose ends. Pass the cables through the cable glands and screw down
in the corresponding positions of the terminal strip. Once the wiring is finished make sure
that the cables are well gripped by the cable glands to maintain the degree of protection.
IMPORTANT NOTE: In order to comply with the electrical safety requirements as per EN-
61010-1 (IEC 1010-1), the installation of the equipment must take into account the
following:
 A mains switch must be provided to disconnect the equipment. This switch must
be marked as the disconnecting device for the equipment and be within easy
reach of the operator.
 The mains supply must have an earth line.
 The housing must not be opened when the instrument has mains supply
connected.
Figure 2