scholarly journals Analisis Kinerja Sensor Water Level - Pressure Transducer (Studi Kasus Automatic Weather System Di Pelabuhan Merak)

ELECTRICES ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 37-42
Author(s):  
Tiven Sandro ◽  
Hairatunnisa Hairatunnisa ◽  
Maulana Putra
Keyword(s):  
Water Level ◽  
Pressure Transducer ◽  
Weather System ◽  
Level Pressure

Pengukuran tinggi muka air laut (water level) merupakan salah satu pengukuran parameter cuaca yang sangat penting di Indonesia mengingat wilayah Indonesia didominasi wilayah perairan. Pengukuran water level dimaksudkan sebagai data peringatan dini untuk mencegah kerugian yang ditimbulkan dari bencana seperti tsunami ataupun pasang gelombang yang tinggi. Dalam melakukan pengukuran water level terdapat beberapa jenis sensor yang digunakan, salah satunya adalah sensor dengan tipe pressure atau tekanan. Pada penelitian ini digunakan sensor water level pressure transducer tipe CS451 yang prinsip kerjanya adalah dengan membandingkan tekanan yang ada di dalam air dengan tekanan udara sebagai referensi dan menghitung selisih antara kedua tekanan tersebut. Selisih yang didapatkan kemudian di konversikan menjadi jarak. Metode yang digunakan dalam penelitian ini terdiri dari dua tahapan yaitu perancangan sistem alat dan evaluasi kinerja alat. Pengukuran yang dilakukan pada tanggal 16 Desember 2019 – 31 Januari 2020 menunjukan data yang baik dimana data tersebut membentuk grafik sinusiodal dengan data rata-rata 1.466 m, nilai data maksimum 2.066 m  dan nilai data minimum 0.821 m. Namun sensor water level mengalami permasalahan yang menyebabkan pengukuran yang dihasilkan menjadi tidak baik. Hal ini disebabkan salah satunya biota laut yaitu teritip yang menutupi sensor water level dan laju korosi pada sensor yang menyebabkan kerusakan pada sensor. Solusi yang harus dilakukan adalah dengan melakukan instalasi dan pemeliharaan dengan lebih baik, selain itu menggunakan cat anti-fouling agar kedepannya permasalahan yang sama tidak terulang kembali.

scholarly journals Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?

2015 ◽  
Vol 4 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Z. Liu ◽  
C. W. Higgins
Keyword(s):  
Water Level ◽  
Pressure Transducer ◽  
Performance Test ◽  
Thermal Fluctuations ◽  
Field Conditions ◽  
Digital Data ◽  
Water Level Fluctuations ◽  
Fine Scale ◽  
Data Logger ◽  
Pressure Transducers

Abstract. Submersible pressure transducers have been utilized for collecting water level data since the early 1960s. Together with a digital data logger, it is a convenient way to record water level fluctuations for long-term monitoring. Despite the wide use of pressure transducers for water level monitoring, little has been reported regarding their accuracy and performance under field conditions. The effects of temperature fluctuations on the output of vented pressure transducers were considered in this study. The pressure transducers were tested under both laboratory and field conditions. The results of this study indicate that temperature fluctuation has a strong effect on the transducer output. Rapid changes in temperature introduce noise and fluctuations in the water level readings under a constant hydraulic head while the absolute temperature is also related to sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effects in the strain gauges. Individual pressure transducers responded differently to the thermal fluctuations in the same testing environment. In the field of surface hydrology, especially when monitoring fine-scale water level fluctuations, ignoring or failing to compensate for the temperature effect can introduce considerable error into pressure transducer readings. It is recommended that a performance test for the pressure transducer is conducted before field deployment.

System for water level measurement based on pressure transducer

2016 ◽  
Author(s):  
Daniel Paczesny ◽  
Michał Marzęcki ◽  
Michał Woyke ◽  
Grzegorz Tarapata
Keyword(s):  
Water Level ◽  
Pressure Transducer ◽  
Level Measurement

Surface and Wake Flow Phenomena of the Vortex-Excited Oscillation of a Circular Cylinder

1967 ◽  
Vol 89 (4) ◽  
pp. 831-838 ◽  
Author(s):  
N. Ferguson ◽  
G. V. Parkinson
Keyword(s):  
Circular Cylinder ◽  
Pressure Transducer ◽  
Reynolds Numbers ◽  
Wake Flow ◽  
Original Design ◽  
Oscillating Cylinder ◽  
Level Pressure ◽  
Flow Phenomena ◽  
Excited Oscillation

Using an original design of acoustic-level pressure transducer, measurements were made of fluctuating pressures on the surface and in the wake of a circular cylinder at rest and in vortex-excited oscillation at subcritical Reynolds numbers. Frequency, amplitude, and phase, where relevant, of the cylinder oscillation were also measured, and some effects of cylinder oscillation on the organized wake geometry were observed. The new results are compared with relevant existing information for the stationary cylinder, and with the few measurements previously available for the oscillating cylinder, and some analysis is made.

scholarly journals A Method for Controlling the Process of Dynamic Settling of Oil Emulsion and A Device for Its Implementation

2021 ◽  
Vol 2 (5) ◽  
Author(s):  
Rzayev Ab.G. ◽  
Asadova R.Sh. ◽  
Gurbanov Z.G. ◽  
Iskenderova A.T.
Keyword(s):  
Water Level ◽  
Optical Density ◽  
Flow Rate ◽  
Oscillation Frequency ◽  
Fluid Layer ◽  
Drainage Water ◽  
Oil Emulsion ◽  
Level Pressure ◽  
Asphaltene Content

The paper describes a method for controlling the process of dynamic settling of oil emulsion (OE). The method involves measuring the flow rate of oil emulsion at the inlet of the settler, the optical density of the fluid layer along the height of the settler, the water level pressure at three points of the height of the settler. The measured values are used to determine the asphaltene content in the fluid layer along the height of the settler and the level of the water cushion (WC) in the settler. The values of these quantities are compared with their nominal ones ​​and when the WC level deviates upwards, the flow rate of drainage water discharged from the settler is increased, and vice versa, and if the asphaltene content deviates upward, the oscillation frequency or redistribution of the initial OE flow among parallel-working settlers is increased. When determining the asphaltene content in the fluid layer, the height of the settler is taken into account. When changing the oscillation frequency is inefficient, if the asphaltene content in the fluid layer increases, the dosage of the demulsifier is increased and vice versa.

scholarly journals Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?

2014 ◽  
Vol 4 (2) ◽  
pp. 533-561
Author(s):  
Z. Liu ◽  
C. W. Higgins
Keyword(s):  
Water Level ◽  
Pressure Transducer ◽  
Performance Test ◽  
Thermal Fluctuations ◽  
Absolute Temperature ◽  
Field Conditions ◽  
Water Level Fluctuations ◽  
Effect Of Temperature ◽  
Fine Scale ◽  
Pressure Transducers

Abstract. Submersible pressure transducers have been utilized for collecting water level data since early 1960s. Together with a digital datalogger, it is a convenient way to record water level fluctuations for long-term monitoring. Despite the widely use of pressure transducers for water level monitoring, little has been reported for their accuracy and performance under field conditions. The effect of temperature fluctuations on the output of vented pressure transducers were discussed in this study. The pressure transducer was tested under both laboratory and field conditions. The results of this study indicate that temperature fluctuation has a strong effect on the transducer output. Rapid changes in temperature introduce noise and fluctuations in the water level readings under a constant hydraulic head while the absolute temperature is also related to sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effect in the strain gauges. Individual pressure transducers responded differently to the thermal fluctuations in the same testing environment. In the field of surface hydrology, especially when monitoring fine-scale water level fluctuations, ignoring or failing to compensate for the temperature effect can introduce considerable error into pressure transducer readings. It is recommended that a performance test for the pressure transducer is conducted before field deployment.

scholarly journals PRESSURE CHANGES IN MEDIA MAINTENANCE OF SHELL PEARL (Pinctada maxima) LARVAE ON PROTEASE ENZYME ACTIVITY ENHANCING GROWTH AND SURVIVAL

2016 ◽  
Vol 7 (2) ◽  
Author(s):  
M.S. Hamzah
Keyword(s):  
Enzyme Activity ◽  
Survival Rate ◽  
Calcium Carbonate ◽  
Water Level ◽  
Oyster Shell ◽  
Pearl Oyster ◽  
Carbonate Production ◽  
Level Pressure ◽  
Protease Enzyme ◽  
Pinctada Maxima

The growth of pearl shell oyster is influenced by nacre availability consisting of calcium carbonate. Nacre is identified as a protein metabolism product in pearl oyster. The aim of this study was to evaluate the effects of media level pressure in larva rearing tank on protease enzyme activity to promote growth performance and survival rate of Pinctada maxima larvae. The research was conducted from March 6th to May 7th 2015 in laboratorium of Mataram Marine Bio Industry Technical Implementation Unit, LIPI. “Chi-Square” test showed that survival rate of larvae at Umbo-veliger stage (planktonic) was significantly affected by water level pressure within 99% with ratio 1.00:1.61. In contrast, treatment with no water level pressure also significantly influenced the survival rate of larvae in spat stage within 99% confidence with ratio of 1.00:1.93. The highest average survival rate of larvae in umbo-veliger and spat stages were 13.10% and 2.60%, respectively. The effect of protease enzyme activity on calcium carbonate production to produce oyster shell are also discussed in this paper. Keywords:  water level pressure, protease enzyme activity, survival rate, growth, larvae, P. maxima

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