Signal amplifier ELECTRA – VNR 23

switchingfor sensorsDIN rail

The VNR2300 control unit was designed as low cost interface for conductive level probes. These electronic units are used to control liquids that have a minimum electrical conductivity of 10 S. The system is based on measurement of the conductivity of the liquid to be controlled and works with low potential and with alternating currents, in order to avoid the incrustation of the electrodes and / or perforation of the tank normally caused by the use of direct currents, which cause a galvanic action on materials The contact of the electrode with the liquid under control determines the actuation of a relay inside the control unit and it is possible to drive any alarm system and / or actuator. By using multiple probes and multiple control units, appropriately connected, a system of dosage and safety can be realized • Adjustable sensitivity from 10S. • Double relay output. • DIN rail mounting. CONTROL AND ADJUSTMENT Control Disconnect the electrodes leads from the terminal board (terminals 5 and 6). Short circuit terminals 5 and 6 of the terminal board, in these conditions, the relays must switch on. Sensitivity adjustment. The unit is supplied with a factory setting of 60 µS. Submerge the electrodes in the liquid under control, turn the side trimmer to obtain the switching of the relays.