Preliminary note Symbols used ► Instruction > Reaction, result […] Designation of buttons, switches or indications → Cross-reference Important note Non-compliance can result in malfunctions or interference� Safety instructions • Please read this document prior to installing the unit� Ensure that the product is suitable for your application without any restrictions�...
Functions and features The unit monitors liquids� It detects the volumetric flow and generates an and converts it into an analogue output signal (4���20 mA)� MEW = final value of the measuring range ������ (= 50 l/min / 3 m /h);...
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► Install in front of or in a rising pipe� �������������� F = flow direction ► Avoid the following installation locations: • Directly in front of a falling pipe� • In a falling pipe� �������������� F = flow direction • At the highest point of the pipe system�...
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The unit can be installed independently of the orientation if the following is ensured: No air bubbles can form in the pipe system� The pipes are always completely filled� • On the suction side of a pump� �������������� F = flow direction If installed in an ungrounded pipe system (e�g�...
Installation in pipes The unit is installed in the pipe using adapters� Adapters have to be ordered sepa- rately as accessories� Order no� E40178: 2 adapters for R½ pipes + 2 seals� Order no� E40191: 2 adapters for ½” NPT pipes + 2 seals� flow direction 1�...
Electrical connection The unit must be connected by a qualified electrician� The national and international regulations for the installation of electrical equipment must be adhered to� Voltage supply to EN50178, SELV, PELV� ► Disconnect power� ► Connect the unit as follows: ����...
Operation After power on and expiry of the power-on delay time (approx� 5 s) the unit is in the Run mode (= normal operating mode)� It carries out its measurement and evaluation functions and generates an analogue output signal� General operating conditions ►...