user manual Manual

Rev. 1a, 2/03 ACF-10 Series
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]
5
• Principle of Operation
When grains flow within a distributed tube such as a pipe or a chute, by
collision and friction between grains themselves or between grains and the wall
of the distributed tube, various sounds and vibrations will be generated.
The sound pickup of the ACF-10 attached outside the distributed tube
receives the generated sounds and vibrations and converts the signal to a relay
output.
Explanation of Functions
Offset Adjustment
By adjusting the signals (noise: sounds and vibrations generating during the
operation of the surrounding equipment) from the sound pickup when the
grains are not flowing, the component of noise can be cancelled.
Gain Adjustment
When the grains flows, by adjusting to amplify only the component of
signals, the signals can be increased to a desired voltage.