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Geokon Audio Option
Geokon manufactures an audio option for use with the Model GK-401 and GK-403 Vibrating Wire Readout Boxes. The audio option consists of a headset connected to an audio amplifier/battery pack that plugs into the charger socket of the faceplate of the readout box, or into the transducer socket in the case of the GK-404. It is a very useful tool for assessing the quality of a vibrating wire sensor during installation and at any time thereafter.
When connected to the GK-401, GK-403 or GK-404, the audio option is roughly the equivalent of having an oscilloscope connected to the readout box, when, instead of a visual trace of the frequency output, there is an audible tone produced in the headset worn by the installer. The audio option can be useful in confirming satisfactory gage output. Good installations are characterized by a clear strong audible tone that decays slowly. The shorter the length of the sensor vibrating wire and the greater its tension the higher is the tone or pitch of the output signal. In general, the ringing of the gage can be heard to continue from one excitation pulse to the next. We strongly recommend that frequent users avail themselves of this very useful accessory.
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