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Set up a recording condition

Use recording conditions to control when data recording starts and stops based on a measurement or time value. You have the option to set start and stop conditions simultaneously or set them individually. It is also possible to mix the types of recording conditions used for starting and stopping data recording. For example, you can set a measurement-based start condition and a time-based stop condition.

Start Condition

Measurement based

Use this condition to control when data recording begins based on a measurement value. For example, you can configure data recording to begin when a sensor measurement passes a set value.

Note

If you're using a Wireless Acceleration/Altimeter or Wireless Force Platform, see the In-sensor Triggering section below.

  1. In the Controls palette, click Recording Conditions.
  2. Expand Start Condition.
  3. Click the Condition Type menu, then select Measurement Based.
  4. For Data Source, click <Select Measurement>, then select a measurement in the list.

  5. Click the Condition menu, then select one of the following condition types to start recording data:

    • Rises Above

      Recording begins when the measurement changes from below the entered value to above the entered value.

    • Falls Below

      Recording begins when the measurement changes from above the entered value to below the entered value.

    • Is Above

      Recording begins when the measurement is above the entered value.

    • Is Below

      Recording begins when the measurement is below the entered value.

  6. Enter a Value for the condition. The units for the value are the same as the units for the selected measurement in Data Source.

  7. Select the Pre-Record box if you want data to be recorded before the start condition is met. After selecting the box, enter a value for the Pre-Recording Time.
  8. Click Record . Data will begin recording when the start condition is met.

Time based

Use this condition to set the amount of time by which data recording will be delayed after you click Record. For example, if you set a value of 10 seconds, data will begin recording 10 seconds after you click the Record button.

  1. In the Controls palette, click Recording Conditions .
  2. Expand Start Condition.
  3. Click the Condition Type menu, then select Time Based.
  4. In Time Delay, enter the amount of time by which you want data collection to be delayed.
  5. Click Record . The clock will count down starting at your entered value. Data recording begins when the clock reaches zero.

In-sensor triggering

In-sensor triggering provides the ability to record a short burst of data at a high sample rate over Bluetooth. When a measurement based condition is met, data is recorded in the sensor and then transferred to Capstone. This is necessary due to limitations in streaming large amounts of data over Bluetooth. This feature is supported on the following sensors:

To enable in-sensor triggering:

  1. Connect one of the compatible sensors listed above to Capstone and create a display.
  2. Follow the steps described above to set up a measurement based start condition until you reach Step 4.
  3. Select the box next to Measurement, then select a non-calculated measurement of acceleration or velocity from the list of options. (Calculated options, such as resultant acceleration, will not work to enable in-sensor triggering.)

  4. A new check box labeled Trigger in the Sensor will appear at the bottom of the Start Condition section. Check this box to enable in-sensor triggering.

  5. Finish setting the measurement based condition as described above.

When using in-sensor triggering, the only stop conditions that can be used are time based stop conditions. If you do not set a stop condition, data recording will stop on its own after the sensor's memory is full. This will likely occur after around 0.5 to 2 seconds of data recording, depending on the sample rate. Due to the high number of samples being transferred, expect some lag as data is transferred from the sensor to Capstone.

Stop Condition

Measurement based

Use this condition to control when data recording stops based on a measurement value. For example, you can configure data recording to stop when a sensor measurement passes a set value.

  1. In the Controls palette, click Recording Conditions.
  2. Expand Stop Condition.
  3. Click the Condition Type menu, then select Measurement Based.
  4. For Data Source, click <Select Measurement>, then select a measurement in the list.

  5. Click the Condition menu, then select one of the following condition types to start recording data:

    • Rises Above

      Recording ends when the measurement changes from below the entered value to above the entered value.

    • Falls Below

      Recording ends when the measurement changes from above the entered value to below the entered value.

    • Is Above

      Recording ends when the measurement is above the entered value.

    • Is Below

      Recording ends when the measurement is below the entered value.

  6. Enter a Value for the condition. The units for the value are the same as the units for the selected measurement in Data Source.

  7. Click Record . Data will stop recording when the stop condition is met.

Time based

Use this condition to set the amount of time Capstone records data after you click Record. For example, if you set a value of 10 seconds, data will record for 10 seconds and then automatically stop.

  1. In the Controls palette, click Recording Conditions.
  2. Expand Stop Condition.
  3. Click the Condition Type menu, then select Time Based.
  4. In Record Time, enter the amount of time you want data collection to be recorded.
  5. Click Record . Data will be recorded until the clock reaches the value entered for the stop condition.