26/02/2014 www.crouzet.com ENR filling or emptying function ENR Part number 84870203 Regulation of two levels: -minimum -maximum Monitoring filling (UP) or emptying (DOWN), selected by a switch on the front panel. Probes supplied with AC current. Sensitivity adjustable on front panel from 5 kto 100 k. Part numbers Type Characteristics Voltages ENR Monitoring filling (UP) Monitoring emptying (DOWN) 120 V AC 84 870 203 Specifications Operating range 0.851.10xUn Maximum power consumption 3 VA Adjustable sensitivity 5 k100k Measurement accuracy (at maximum sensitivity) 30% Electrode voltage (max) 24 V AC (50/60Hz) Electrode current (maximum) 1mA (50/60Hz) Maximum cable capacity 10 nF Response time high level 300 ms Response time low level 500 ms Output relay (according to AC1 resistive load) 1 AgNi changeover relay 8 A AC max. Galvanic isolation via transformer (4 kV, 8 mm creepage Class II distance) Isolation of contacts and electrodes from power supply 2.5 kV AC Operating temperature range (C) -20+50C Storage temperature range (C) -40+70C Weight (g) 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 inU mode and is de-energised when inDOW mode. o Legend N Maximum level Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected26/02/2014 www.crouzet.com Minimum level Output relay: Down or Up Dimensions (mm) ENR Connections ENR A1-A2 : power supply o N Legend *** TRADUCTION MANQUANTE *** Unless otherwise specified, the characteristics given are applicable to all or part of the product range selected