During the test, the device shall turn on its vertical axis at a rate of 4 turns per minute. However, if the water is simultaneously directed to the device under test from all directions in the horizontal plane using a multitude of nozzles, there is no need to rotate the device during the test. In this latter case the water flow specified above shall be adjusted accordingly to achieve even distribution and the correct precipitation. a2c0
During the test, the device shall turn on its vertical axis at a rate of four turns per minute. a0c0