Teach Functions
Capacitive sensors have the unique ability to detect almost all materials,
liquid or
solid. Capa ci tive
sensors can detect metallic as well as non-metallic objects. How -
ever, their traditional use is for non-metallic materials such as:
•Plastic Industry: resins, regrinds or moulded products.
•Chemical Industry: cleansers, fertilisers, liquid soaps, corrosives and
petrochemicals.
•ood Industry: saw dust, paper products, door and window
frames.
•Ceramic & Glass Industry: raw material, clay or finished product, bottles.
•Packaging Industry: package inspection for level or contents, dry goods, fruits
and vegetables, dairy products.
Materials are detected due to their dielectric constant. The bigger the
size of an
object, the higher the density of material, the better or easier it is to de
tect the object.
Nominal sensing di stan ce for a capacitive sensor is referenced to a grounded me tal
plate (ST37). For addi tional information regarding di elec
tric ratings of materials
please
refer to our catalogue: “SENSORS”.
Installation
1. Mounting the sensor
Mount the sensor in the required position pointing at the target and make sure
that the distance to the target is within the range of the sensor.
2. Supplying the sensor
To supply the sensor, connect blue wire (3) to ground (0 VDC) and brown wire
(1) to + (10-40 VDC).
3. Programming the sensor
Program the sensor as described in the Teach-in guide. The following functions
are programmable: 1. Background adjustment and switch-point setup, 2. Object
adjustment, 3. NO/NC selection and 4. Restore factory settings (1. and 2. are
mandatory).
Description and Installation
Normal operation, optimized switching point.
1. Mount the sensor in the application without the object
present. Yellow ED is not important and green ED
is ON.
2. Press the button for 3 seconds until both EDs
are flashing simultaneously.
(The first switch point is stored)
3. Place the object in the detection zone.
4. Press the button once and the sensor is ready to
operate (green ED ON, yellow ED ON).
(The second switch point is stored).
If the object is too close to the background, the sensor will
perceive both background and object as object.
For maximum sensing distance
(default setting)
1. Mount the sensor in the application without the object
present. Yellow ED is not important and green ED is
ON.
2. Press the button for 3 seconds until both EDs
are flashing simultaneously.
(The first switch point is stored)
3. Press the button a second time and the sensor is
ready to operate (green ED ON, yellow ED ON)
(The second switch point is stored)
For dynamic set-up (running process)
1.ine up the sensor at the object. Green ED is ON,
status on the yellow ED is not important.
2.Press the button for 3 seconds until both EDs are flashing
simultaneously.
3. Press and hold the button a second time for at least
one second (both EDs are flashing simultaneously and fast)
and keep the button pressed for at least one process
cycle. Release the button and the sensor is ready to
operate (The second switch point is stored).
If more process cycles are analysed, a more precise
setting is possible.
For make or break set-up (N.O. or N.C.)
1. Press the button for 10 seconds, until the green ED
flashes.
2. While the green ED flashes, the output is inverted
each time the button is pressed. Yellow ED indicates
N.O. function selected.
If the button is not pressed within the next 16
seconds, the current output is stored.
Factory settings
Press the button for 16 sec.
