| Learning Notes |
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| Part 1 - View Slide |
- Installing your ultrasonic sensor in a stand-pipe improves performance in applications with extreme foam, turbulence and vapor.
- A sound pulse is emitted from the base of the transducer and travels through air, reflecting against the liquid surface below.
- The sensor measures the time differential between sound transmission and receipt, and translates this into liquid height or volume.
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| Part 2 - View Slide |
- Foam and vapor absorb ultrasonic energy, and turbulence deflects it. This may result in signal attenuation causing poor sensor performance.
- Stand-pipe installations isolate surface foam, eliminate turbulence and minimize vapor at the sensor's point of measurement.
- Avoid using stand-pipe installations in thick, coating, crystallizing or scaling type liquids.
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| Part 3 - View Slide |
- Assembly includes a pipe & female threaded adapter. 1" transducers require a minimum 2" pipe. 2" transducers require a minimum 3" pipe.
- Add a plastic reducer bushing between the transducer and threaded adapter.
- Pipe length should be slightly longer than the measurement span, and be smooth without couplings or holes.
- Drill (2) 1/4" pressure equalization holes in the pipe, just under the adapter in the dead band of the sensor.
- Cut a 45° angle on the bottom of the pipe that will dampen out any water hammer affects within the pipe.
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| Part 4 - View Slide |
- Locate the stand-pipe away from mixers, submersible pumps or pipes. Firmly affix to the pipe to the tank or associated mounting apparatus.
- Liquid level should never drop below the bottom of the stand-pipe.
- The pipe may require periodic cleaning to eliminate material build-up over time.
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