Cautions

1Calm down for 5 minutes before testing.
2The testing for kids who are 12 years old or younger is not reliable because their fingers are too thin to test.
3If the test result is not what you expected, calm down and try again after 30 minutes.
4It is best to use average of 5 test results.
5For better test, the finger in the probe should be placed horizontally with the rubber band for even light reflection.
6Do not test after drinking or smoking. The test may not be reliable.
7When you test during the winter or in cold weather, warm the fingers first.
8Do not yawn or take deep breaths during the test. It may affect automatic nerves.
9When you test outdoors, cover your hand with a tower. The light may affect the test.