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Container Teach-In

"Empty only" Teach-In​

  1. Set the Dielectric Constant (εR) of the substance in your container via the respective IO-Link parameter.
note

You can also order ORCA Level Sensors with the desired Dielectric Constant pre-configured.

  1. Mount the sensor in the empty container.
  2. Trigger the IO-Link System Command "Teach Empty Container".

Low and high reference fill levels will be set to 0% (empty) and 100% (full), respectively, and the currently measured capacitance is applied as low (empty) reference value. The high (full) reference value is calculated using the configured dielectric constant.

Two-Point Teach-In​

Two-Point Teach-In offers you to use "low" and "high" reference fill levels of your choice for container teach-in.

  1. Configure the desired reference "low" and "high" fill levels by setting the respective IO-Link Parameters.
  2. Fill the container to the percentage given as Container Low Fill Level.
  3. Issue the IO-Link System Command "Container Teach In 'Low'".
    • The currently measured capacitance will be saved in the sensor as "low" level reference.
    • The sensor's LED may start to blink yellow. This indication of an invalid parameter set will cease after high level teach-in.
  4. Fill the container to the percentage given as Container High Fill Level.
  5. Issue the IO-Link System Command "Container Teach In 'High'".
    • The currently measured capacitance will be saved in the sensor as "high" level reference.
note

In non-IO-Link environments, the two-point teach-in can also be performed via Pin 4, provided that its function is configured to Teach Container. (This feature is available from firmware V3.3 on.)

Order your Level Sensor with the desired "low" and "high" fill levels pre-configured, or set them via IO-Link before mounting the sensor in its application.

Teach-in of the "low" reference point:

  1. Connect Pin 4 to the supply voltage. After 1 second, the sensor's LED lights up turquoise.
  2. Within the next 3 seconds, disconnect Pin 4 from the supply voltage. The LED flashes to confirm that the "low" reference point has been set.

Teach-in of the "high" reference point:

  1. Connect Pin 4 to the supply voltage. After 1 second, the sensor's LED lights up turquoise.
  2. Keep Pin 4 connected for about another 3 seconds until the LED turns blue.
  3. Within the next 3 seconds, disconnect Pin 4 from the supply voltage. The LED flashes to confirm that the "high" reference point has been set.

Additional Reference Points​

Optionally, up to four more reference points for fill level calculation can be set in addition to the low (empty) and high (full) references. They allow to adjust the fill level calculation for special container shapes, like funnels.

The additional reference points can be configured via their IO-Link parameters:

  1. Set the desired fill level percentage of the additional reference point X (X = 1...4).
note

When its fill level is set to -1, the reference point is disabled.

  1. Fill the container to that percentage.
  2. Issue the IO-Link System Command "Set Additional Reference X".

Dielectric Constant​

Being a capacitive sensor, ORCA Level Sensor makes use of the dielectric constant of the substance to be measured for "Empty only" Teach-In. For conductive substances, a "magic" value of 653.55 is applied.

The IO-Link IODD files contain a short list of Dielectric Constants. For extended lists, please refer to a listing of relative permittivity values, e.g. in CAPTRON's level sensor catalog, pages 51ff.

Once the sensor was taught for a certain container, the level measurement can be adjusted to a different substance by changing the Dielectric Constant and then triggering the IO-Link command "Adjust to changed medium".

Determine Dielectric Constant using ORCA​

ORCA Level Sensors can determine the Dielectric Constant of a substance in a container using IO-Link controls:

  1. Ensure that the parameters Container High/Low Fill Level are set to 100% and 0%, respectively.
  2. In an empty container, trigger the "Container Teach In 'Low'" command.
  3. Fill the container with the medium to 100%.
  4. Trigger the "Container Teach In 'High'" command.
  5. Trigger the "Calculate Dielectric Constant" command.
  6. Read the calculated value from the parameter "Medium Calculated Constant".
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