The Fluke 810/TRNG is a vibration tester that measures vibration levels on rotating machinery. It is used to identify and diagnose problems with rotating machinery, such as unbalance, misalignment, and bearing wear. The Fluke 810/TRNG is a portable, battery-operated instrument that is easy to use. It has a large, backlit display that shows the vibration level in both the time domain and the frequency domain. The Fluke 810/TRNG also has a built-in accelerometer that measures the vibration level in three axes.