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Cleanroom Tip: Using an Adenosine Triphosphate (ATP) Monitoring System

By Robert Kravitz | May 11, 2018

  • Store swabs in a refrigerator at no more than 46 degrees F.
  • Avoid leaving swabs at room temperature for more than 20 minutes.
  • ATP systems may need to conduct a “self-test” for about 60 seconds when first turned on. Avoid using the unit until it has finished performing this test.
  • For flat surfaces, swab a 4-in. x 4-in. area, moving the swab from left to right and up and down.
  • For irregular surfaces such as door handles, swab enough of an area to collect a good sample.
  • Rotate the swab during use so all areas of the swab come into contact with the surface to be tested.
  • After using the swab, place it in a tube, provided with most systems. Snap the top of the tube to release a liquid that protects the sample.
  • Hold the tube vertically and shake it back and forth for about five seconds.
  • Keeping the swab upright, insert it into the monitoring device for testing.
  • Wait about 15 seconds.

This cleanroom tip was taken from “Avoiding the ‘Killer Defect’” by Robert Kravitz.

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