Germany Deutsch
Germany English
France
Spain
Italy
Canada
United States of America
United Kingdom
Ireland
Australia
Korea
China

Rechner Sensors

Celebrating 40 Years of Capacitive Sensors in North America
 


Rechner Sensors

Adjustment Instructions for Capacitive Sensors

Capacitive sensors can be adjusted to a variety of materials and filling situations. In general we have two standards operations for adjusting a sensor to its environment.

Adjusting a sensor to a full condition means that the sensor will only detect an object when that object has fully entered the sensor's field. This is useful if there are other objects in the sensor's field that you want to ignore or if you want to ignore a build-up of product that sticks to the sensor like flour, chocolate, or hot-melt glue. This setting is the most accurate setting for detecting material because it will prevent false detections of products.

Adjusting a sensor to an empty condition means that the sensor will detect ANY object that enters the sensor's field. This can be useful for detecting objects at a distance or for early leak detection. This setting will make the sensor the most sensitive for its current mounting position. Beware that ANY object will make the sensor detect and that powder/liquid residue left on the sensor after detection will cause the sensor to remain on.

"Full Adjustment" Instructions:

  1. Locate the sensitivity adjustment potentiometer on the back or on the side of the sensor (for units with a separate amplifier the sensitivity adjustment screw will be on the amplifier. This can be recessed under a plastic or metal screw. Remove the protective screw to adjust the sensor).
  2. Fully immerse the sensor into the product to be detected.
  3. Reset the sensor's sensitivity by turning the potentiometer counter-clockwise 20 full turns, or until the sensor no longer sees the product.
  4. Adjust the sensor to the product to be detected by turning the potentiometer clockwise until the sensor just sees the product.
  5. Add 1/4 turn for safety by turning the potentiometer a further 90 degrees clockwise.

"Empty Adjustment" Instructions:

  1. Locate the sensitivity adjustment potentiometer on the back or on the side of the sensor (for units with a separate amplifier the sensitivity adjustment screw will be on the amplifier. This can be recessed under a plastic or metal screw. Remove the protective screw to adjust the sensor).
  2. Empty your tank of any foreign product.
  3. Find the switching point by turning the potentiometer clockwise 20 full turns or until the sensor's LED turns ON (yellow).
  4. Adjust the sensor to the "empty" environment by turning the potentiometer counter-clockwise until the sensor just turns off.
  5. Add 1/4 turn for safety by turning the potentiometer a further 90 degrees counter-clockwise.

Rechner has a 20-turn trim pot with no mechanical stop. If you find that a full setting is not sensitive enough or that an empty setting is too sensitive then you can find the middle ground for your application by counting the turns between an empty setting off and a full setting on and then adjusting the sensor halfway between the two.