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Germany (0 91 87) 10-0 - USA (847) 827-7600 - UK (01296) 420336 - www.etacbe.com
Issue C
First installation
The Level Sensors are factory preset for water.
1. Install the Level Sensor and connect it as shown on the
connection diagram.
2. For sensitivity setting turn the potentiometer screw until
the LED changes.
3. Adjust the potentiometer screw another half turn to
compensate for any tolerances and to eliminate deposits
on the sensor (allow for response delay!).
For other media it is necessary to readjust the sensors
(make sure the medium to be monitored is available!).
These instructions do not apply to model NR 60
because its sensitivity is factory preset.
For installation details please see the applicable Instal-
lation Instructions.
E-T-A Capacitive Level Sensors
E-T-A level sensors are of high quality, practically mainte-
nance free and have a wide operating temperature range.
They respond to the change of capacitance occurring
when an electrode surrounded by air is immersed into the
medium to be monitored. This capacitance change cau-
ses a circuit to oscillate which is processed electronically.
The different versions can be used as MIN/MAX sensors
with closed circuit principle. Power failure and wire break
are indicated the same way as incorrect medium level.
Models NR 150, NR 160 and NR 200 allow the selection
of minimum or maximum switching by means of an
integral selector switch, whereas models NR 80, NR 60
and NR 100 are factory-preset as a minimum or maximum
sensor.
Model NR 200 features a potential-free relay change over
contact, models NR 100, NR 150 and NR 160 a short-
circuit proof plus switching transistor output, and models
NR 60 and NR 80 a minus switching transistor output.
Capacitive Level Sensors
All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes.