KN0006 - Level sensor IFM - Free user manual and instructions

USER MANUAL KN0006 IFM

• Capacitive level switch for monitoring levels of liquids and dry bulk material, preferably plastic granulates.

• Automatic adjustment to the medium to be detected by means of programming pushbutton.

• The sensing face is rated for temperatures up to 110 °C and can be mounted in direct contact with the sight glass (without air gap).

programming pushbutton LEDs red, yellow, green sensing face threaded sleeveMounting Mount the level switch as shown: Electrical connection Disconnect the installation from power. Connect the unit (see type label). Operation Adjust the sensor. To do so, press the programming pushbutton with a blunt object. Programming Overview of the modes and their basic functions:

• Operating mode: Normal operating mode. In this mode all normal sensor functions are active.

• Adjustment mode: Setting of the switching threshold by empty and full adjustment.

• Locking mode: Locking and unlocking of the unit possible to avoid tampering.

Not in contact with the medium (only for non-metallic tanks) In contact with the mediumEmpty adjustment The unit must be adjusted after installation in the empty tank (empty adjustment). The tank can be considered to be "empty" when the medium to be detected is min. 20 mm away from the active zone. If the sensor detects a medium after adjustment, its switching status changes. Note: The sensor is operational just with empty adjustment. However, it is recommended to carry out a "full adjustment" with the active zone being completely covered after empty adjustment. On the basis of the values for the empty state/full state the internal microprocessor deter- mines the optimum position of the switching thresholds between the two states. Using both adjustment criteria (empty and full adjustment) results in the maximum operational reliability for the application. For empty adjustment the internal microprocessor generates 2 values. The first value corresponds to the sensor signal measured in the empty state. The second value is an assumed measured value for the full state. It is calculated from the just measured empty state and a facto- ry signal preset. For full adjustment this second value is replaced by a real measured value.

Press the programming pushbutton until the green LED flashes (for min.1 s and max. 5 s; unit is in the adjustment mode). For the normally open version all LEDs are off after adjustment. For the normally closed version the yellow LED lights. 1 ... 5 sFull adjustment After empty adjustment the full state is to be achieved, if possible, so that the unit switches. The full adjustment can be repeated as often as you like. The stored value for the empty state is not overwritten by the full adjustment. After a new empty adjustment both values are automatically set again, the values last defined are overwritten. Therefore always carry out the empty adjustment first, then, if necessary, the full adjustment! Locking The stored adjustment values can be protected against unauthorised programming as follows (factory setting: not locked): When the programming pushbutton is released the unit is locked and all programming functions are inactive. The unit returns to the opera- ting mode. If this operation starts from the locked state, the green LED does not react for 10 s. After 10 s the unit is unlocked (see "Unlocking").

Press the programming pushbutton until the green LED flashes quickly (= the unit is in the adjustment mode). The LED first flashes slowly (about 1 Hz), after 5 s it flashes double as quickly (about 2 Hz). After adjustment only the yellow LED lights - for the normally open version. For the normally clo- sed version all LEDs are off. 5 ... 10 s Press the programming pushbutton for min. 10 s. The green LED first flashes slowly (about 1 Hz), after 5 s more quickly (about 2 Hz), after 10 s it goes out, the unit is locked. min. 10 sUnlocking When the programming pushbutton is released the unit is unlocked and all programming functions are active again. Error messages If empty or full adjustment cannot be made, the red LED flashes quick- ly at about 8 Hz after the adjustment attempt (adjustment error). To delete this error message press the programming pushbutton once or power off and then power on again. The measured values succes- sfully read so far remain unchanged. Possible reasons for an error message:

• The signal difference between the empty and full state is too small (e.g. empty and full adjustment without sufficient change of the level).

• The signal change between the empty and full state is in the wrong order (e.g. empty adjustment in the full state and then full adjust- ment in the empty state).

• Empty adjustment outside the operating range (e.g. empty adjust- ment in case of direct contact with an electrically grounded medi- um, e.g. if the active zone is immersed in water). Help: Avoid the above-mentioned errors and repeat the adjustment for error correction.

Press the programming pushbutton for min. 10s. After approx. 10 s the green LED flashes briefly for 2x. The unit is unlocked again and the LEDs indicate the current operating state. min. 10 sFurther faults:

• Electronic fault or sensing zone of the unit damaged

• Internal fault (can only be deleted by power off and then power on again, hardware reset). Set-up / Operation Check the safe functioning of the unit. To do so, bring about a sensor response by taking suitable measures. Display by LEDs: The red LED becomes active for a short time during the change bet- ween "medium not present" and "medium present" (flashes at 1 Hz) if the medium is close to reaching the switching threshold. This can occur in particular if the level changes very slowly and is no error mes- sage meaning a fault in the unit. The operation of the level switch is maintenance-free. For a correct function ensure:

• The sensing face and the open space should be kept free of depo- sits and foreign bodies, particularly for mounting with the sensing face showing upwards. Technical data Technical data and further information at www.ifm.com --> Select your country --> Data sheet search

• flashes slowly (1 Hz): adjustment mode empty adjustment

• flashes quickly (2 Hz): adjustment mode full adjustment

• OFF: unit is in the operating mode LED gren

• flashes quickly (8 Hz): adjustment error, internal fault