26/02/2014 www.crouzet.com
ENR filling or emptying function ENR Part number 84870201
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) 24 V AC
84 870 201
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