10/04/2014 www.crouzet.com ENR ENR Part number 84870204 Product replaced by the new ENR 84 870 200 Part numbers 84 870 204 Type Characteristics Voltages ENR Monitoring filling UPMonitoring emptying DOWN 230 V AC Specifications Operating range Maximum power consumption Adjustable sensitivity Measurement accuracy (at maximum sensitivity) Electrode voltage (max) Electrode current (maximum) Maximum cable capacity Response time high level Response time low level Output relay (according to AC1 resistive load) Galvanic isolation via transformer (4 kV, 8 mm creepage distance) Isolation of contacts and electrodes from power supply Operating temperature range (C) Storage temperature range (C) Weight (g) 0.85 1.10 x Un 3 VA 5 k100 k 30 % 24 V AC (50/60 Hz) 1 mA (50/60 Hz) 10 nF 300 ms 500 ms 1 AgNi changeover relay 8 A AC max. Class II 2.5 kV AC -20 +50 C -40 +70 C 150 Principles Operating principle Monitoring maximum and/or minimum levels of conductive liquids (tap water, sea water, waste water, chemical solutions, coffee, etc). The principle is based on measuring the apparent resistance of the liquid between two submerged probes. When this value is lower than the preset threshold displayed on the unit's front panel, the output relay changes state. To prevent any occurrences of electrolysis, an AC current is passed through the probes. Areas of application include the agri-food, chemical and other industries. Adjusting two levels : Minimum/Maximum The output relay changes state when the level of liquid reaches the maximum electrode, with the minimum electrode submerged. It returns to its initial state when the minimum probe is no longer in contact with the liquid. Note If the power break T lasts for 1 second or more, the relay reenergises instantly when in "UP" mode and is de-energised when in "DOWN" mode. No Legend Maximum level Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected 10/04/2014 www.crouzet.com Minimum level Output relay : Down or Up Dimensions (mm) ENR Connections ENR A1-A2 : power supply No Legend *** TRADUCTION MANQUANTE *** Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected