Limit Testing

You can use limit testing to monitor a waveform and determine if it always satisfies a set of conditions, usually upper and lower limits.

The region bounded by the specified limits is a mask. The result of a limit or mask test is generally a pass or fail. Limits are classified into two types—continuous limits and segmented limits.

You can use the same method to create and control many different automated test systems. Complete the following basic steps to set up an automated test system for limit testing.

  1. Configure the measurement by specifying arbitrary upper and lower limits. This defines the mask or region of interest.
  2. Acquire data using a DAQ device.
  3. Monitor the data to make sure it always falls within the specified mask.
  4. Log the pass/fail results from step 3 to a file or visually inspect the input data and the points that fall outside the mask.
  5. Repeat steps 2 through 4 to continue limit testing.

Refer to the following sections for more information.