How to use a Clavis belt meter?

OPERATIONAL USE

1. Connect the sensor head to the sensor socket in the centre of the meter and turn on the unit by pressing the ON/OFF button.  If using an acoustic sensor head hold the sensing head steady across the belt span. 
2. If you are using an optical sensor head aim the sensor at the belt with a gap between 5mm and 25mm.
3. Tap the belt gently near mid span using the handle of a small screwdriver or similar, to cause the belt span to vibrate.
4. The meter will now display the frequency of vibration, and sound “BEEP” to indicate that a valid reading has been taken.
5. If a reading is not obtained check that the sensing head is not touching the belt and try again.