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All Journal Spektra: Jurnal Fisika dan Aplikasinya Jurnal Sains dan Teknologi Jurnal Ilmu dan Inovasi Fisika
Dudi Adi Firmansyah
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Veterinary

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MEASURING INSTRUMENT FOR REFILLED DRINKING WATER USING A TDS SENSOR Dudi Adi Firmansyah; Kamila Rofa Khairunnisa Ibadurrohman; Bernadus Bisma Titis Restu Aji; Suprijanto Suprijanto
Spektra: Jurnal Fisika dan Aplikasinya Vol 5 No 2 (2020): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 5 Issue 2, August 2020
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.052.07

Abstract

Water is an essential need for humans and consumed as drinking water after fulfilling the health requirement in the Republic of Indonesia Minister of Health Regulation No.492/Menkes/Per/IV/2010. Due to the increasing demand, there are currently many refilled drinking water stores as an economical and practical alternative way to people. However, their safety still needs to be tested in the laboratory. This condition is impractical so that it needs a portable measuring instrument especially based on the TDS sensor that can measure the total dissolved solids (TDS) and electrical conductivity (EC) at once, which determines the taste and safety of the water. TDS sensor calibration at 80.5 to 966 ppm shows a 93.4% accuracy; 99.8% precision and 1.3 ppm hysteresis. In comparison, EC calibration at 161 to 1932 microsiemens/cm produces an average of 82.3% accuracy, 97.1% precision, and 1.0 microsiemens/cm hysteresis. This prototype is then employed to measure the water sample and determine its safety to consume and observed a decreasing trend of TDS and EC (194.1 ppm and 388.2 microsiemens/cm) as compared to the water spring sample (20.2 ppm and 402.3 microsiemens/cm). The prototype also has a Bluetooth module that enabling the remote observation on a cell phone without the presence of a telephone network.
Pembuatan Prototipe Instalasi Uji Meter Air Elektronik Tipe Vertikal Metode Gravimetrik dan Pengaruh Kekeruhan terhadap Akurasi Pengukuran Dudi Adi Firmansyah
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 5, No 1 (2021)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (582.376 KB) | DOI: 10.24198/jiif.v5i1.31297

Abstract

Meter air merupakan alat ukur yang digunakan untuk menunjukan jumlah volume air atau laju alir dari fluida yang dialirkan melalui saluran pipa. Agar dapat menunjukan hasil pengukuran yang akurat, meter air harus dikalibrasi dengan memenuhi semua kondisi yang dipersyaratkan, termasuk di dalamnya kondisi air uji yang digunakan di dalam instalasi uji. Sesuai dengan Rekomendasi OIML R 49-2, air uji tersebut harus memenuhi persyaratan air minum, tidak mengandung bahan yang dapat merusak meter air dan berbahaya bagi manusia. Salah satu parameter kualitas air yang dapat merusak meter air adalah tingkat kekeruhan. Untuk menguji parameter kekeruhan, prototipe instalasi uji dibuat agar dapat mengukur kekeruhan dan  mengalirkan air uji secara vertikal menuju meter air lalu air keluarannya ditimbang pada suhu tertentu untuk diubah menjadi volume dan dibandingkan dengan volume dari meter air. Prototipe ini menggunakan berbagai sensor dan hasil kalibrasinya menunjukan tingkat akurasi dan presisi yang tinggi yaitu sensor loadcell 99,8% dan 99,9%; sensor volume 95,4% dan 93,6%; sensor suhu 96,3% dan 95,9%; dan sensor kekeruhan dengan tingkat kesalahan 0,5% dan RSD 3,3%. Hasil pengujian pada meter air digital tipe vertikal menunjukan peningkatan tingkat kesalahan dari 0,5% menjadi 3,0% dan 4,7% pada saat kekeruhan dinaikan dari 17,1 NTU (air bersih) menjadi 36,9 NTU dan 95,6 NTU melalui penambahan tanah pada air uji. Efek kekeruhan lebih terlihat saat menggunakan densitas hidrometer, peningkatan tingkat kesalahan dari 0,9% menjadi 4,5% dan 7,2% teramati.
Analisis Keselamatan dan Kesehatan Kerja di Akademi Metrologi dan Instrumentasi Nandang Gunawan Tunggal Waras; Dudi Adi Firmansyah; Budi Yasri
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 6 (2023): Desember 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i6.3191

Abstract

Occupational Safety and Health (K3) is an effort to create a safe, healthy and prosperous work environment, free from accidents, fires, explosions, environmental pollution and work-related diseases. Work accidents can cause losses for workers, employers, government and society, which can include loss of human life, damage to property and the environment. For this reason, concrete steps need to be taken to prevent and reduce the occurrence of work accidents as much as possible. One of the conditions where work accidents can occur is in the educational environment. The research uses descriptive methods with the aim of identifying the types of work accidents and how to overcome them that can occur. Based on the research results, it was concluded that occupational safety and health are very important, potential accidents in the Akmet environment can be identified. By using the HIRADC method, potential hazards can be identified and controls that must be implemented, such as using elimination methods to creating a quality manual and creating procedures for academic activities. This research has produced a draft Quality Guide for Occupational Safety and Health as well as procedures for academic activities in the Akmet environment.
Co-Authors Bernadus Bisma Titis Restu Aji Budi Yasri Kamila Rofa Khairunnisa Ibadurrohman Nandang Gunawan Tunggal Waras Suprijanto Suprijanto