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INDONESIA
Journal of Energy, Material, and Instrumentation Technology
Published by Universitas Lampung
ISSN : 27472043     EISSN : 2747299X     DOI : https://doi.org/10.23960/jemit
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Ruang lingkup penulisan dalam jurnal ini meliputi: 1. Fisika Teori Mekanika Klasik Elektromagnetik Termodinamika Mekanika Statistik Mekanika Kuantum Teori Relativitas Kuantum Gravitasi Astrofisika Kosmologi 2. Fisika Bumi (Geofisika) Geothermal Geolistrik Seismik Geomagnet 3. Fisika Material Nanomaterial Logam dan Korosi Material Magnetik Thin Film Fotokatalis/Katalis Semikonduktor Superkonduktor Keramik Polimer 4. Elektronika dan Instrumentasi Sensor Instrumentasi Biomedik Instrumentasi Pertanian Instrumentasi Lingkungan Biofisika Fisika Komputasi Laser 5. Fisika Nuklir Keselamatan Reaktor Analisis Neutronik Manajemen Bahan Bakar dan Limbah
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 121 Documents
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Furnace Control System Using the TCN4S Temperature Controller Saputri Wahyuning Dewi; Gurum Ahmad Pauzi; Junaidi Junaidi; Sri Wahyu Suciyati
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 3 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i3.104

Abstract

In the academic world, especially in research activities at the University of Lampung, there are many things that the application of research requires an instrumentation system design to support these research activities. One example is used to melt metal or other materials. Therefore, this research aims to make a furnace using the Autonics TCN4S temperature controller. The basic configuration of a temperature regulation system consisting of temperature control is TCN4S, SSR (Solid State Relay), and Thermocouples. The results of this study indicate that the maximum temperature that can be achieved is 383°C within 710 seconds in an open space with an electric power of 1032.48 Watt and a strong current of 4.7 A so that the consumption of electricity consumption in the furnace is 0.2 KWh.
DC Motor Speed Control System with PWM (Pulse Width Modulation) Technique Based on Arduino For Centrifugation Equipment Application Ellen Margirahayu; Junaidi Junaidi; Gurum Ahmad Pauzi; Sri Wahyu Suciyati
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 3 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i3.105

Abstract

A DC motor speed control system with Arduino-based PWM (Pulse Width Modulation) technique has been realized for centrifugation applications. Tool design consists of hardware and software. The hardware used is Arduino Uno, brushless DC motor, ESC (electronic speed control), optocoupler, 4x4 keypad, and seven-segment, and the software used is Arduino IDE. The working principle of this tool is that Arduino will process input from the keypad and provide a signal to the ESC (electronic speed control) to drive a brushless DC motor. The optocoupler sensor will detect motor rotation, and the data obtained will be displayed on the seven segments. This tool works with a speed range of 4,000 to 7,000 RPM. Rotational speed testing has been carried out using the DT-2234C+ tachometer. The test results show the highest error occurs at a speed of 5,000 RPM which is 3.62% and the lowest error occurs at a speed of 6,000 RPM at 1.01%.
Prototype Measuring Levels of Dissolved Ammonia Based on TSL2561 Sensor Calibrated Thermo Scientific Genesys 30 Visible Spectrophotometer Titin Putri Aripta; Sri Wahyu Suciyati; Amir Supriyanto; Junaidi Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 3 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i3.110

Abstract

In this study, a prototype measuring instrument for dissolved ammonia levels based on the TSL2561 sensor and calibrated thermo scientific Genesys 30 visible spectrophotometers has been realized, which aims to create a system for reading dissolved ammonia levels. This measuring instrument uses a violet LED as a light source, Arduino UNO as the central processor, and an I2C LCD to display measured values. This research was carried out by reading sensor tests on artificial instruments and spectrophotometer with dissolved ammonia samples with levels varying from 0-0.3 mg/l to obtain an equation for converting the absorbance value of the artificial measuring instrument into the dissolved ammonia level value, which was implemented in the Arduino program. Furthermore, an artificial measuring instrument is applied by measuring the dissolved ammonia level in the wastewater sample, namely the wastewater from the shrimp seeds tank, artemia tank, and tilapia tank. This measuring instrument has a measurement range from 0-0.3 mg/l. The sensor test results show that the greater the dissolved ammonia level, the greater the absorbance value. The results of the application of artificial measuring instruments obtained the value of dissolved ammonia levels in the wastewater of the shrimp seeds tank of 0.2811 mg/l, the wastewater of the artemia tank of 0.0672 mg/l, and the wastewater of the tilapia pond at 0.0156 mg/l. Based on the calculation results, it was obtained that the average accuracy and precision for the shrimp seeds tank wastewater was 98.63% and 98.47%, the Artemia tank wastewater was 97.72% and 98.08%, while for the pond wastewater tilapia by 95.71% and 99.74 %.
Smart Greenhouse Monitoring With Soil Temperature and Humidity Control on Internet of Things (IoT) Based Orchid Plants Feri Aditya Ridwan Mas; Sri Wahyu Suciyati; Gurum Ahmad Pauzi; Junaidi Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 3 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i3.111

Abstract

Research on monitoring systems with control has been developed with several different inputs and outputs. This research has realized a smart greenhouse monitoring tool with temperature and soil moisture control on orchid plants based on the Internet of Things (IoT). This study aims to create a monitoring tool for temperature, air humidity, soil moisture, and water level. In the system, the microcontroller used is Wemos D1 R1, with inputs in the form of a DHT-11 sensor to measure air temperature and humidity, a soil moisture sensor to measure soil moisture, and an ultrasonic sensor to measure the water level in the containers. The resulting system output is in the form of pump and fan control. Based on the results of sensor testing, the accuracy of the DHT-11 sensor is 99.97%, the error is 0.03%, the soil moisture sensor is 98.63% accurate, the error is 1.37%, and the ultrasonic sensor is 97, 61% with an error of 2.89%. Based on the research results, the system can run well, as shown by Thingspeak, and the website smartgreenhouseanggrek.weebly.com can receive the results of monitoring sensor data using an internet connection. The tool will carry out the process of wateringplants when the soil moisture value read by the sensor is 20% and will stop watering when the sensor reads the soil moisture value reaches >= 50%. In contrast, the air temperature control is done by turning on the fan if the temperature reaches 30° C.
The Effect of Cacao Leaf Extract as An Inhibitor with A Concentration Variation of 0%, 3%, 5%, And 7% on The Corrosion Rate of St 37 Steel with Immersion Time of 3 Days And 6 Days in NaCl Corrosive Medium 3% Nia Diana; Ediman Ginting; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 4 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i4.114

Abstract

This study aims to determine the effect of adding inhibitors of cacao leaf extract with concentrations of 0%, 3%, 5%, and 7% in 3% NaCl corrosive medium on the corrosion rate of St 37 steel, knowing the effect of cacao leaf extract in inhibiting the corrosion rate of St 37 steel in NaCl solution and knowing the microstructure, phase, and corrosion products on St 37 steel after immersion in NaCl solution. The weight loss method was carried out to determine the value of the resulting corrosion rate. The Fourier transform infrared (FTIR) analysis showed the presence of tannins in the cacao leaf extract. The X-ray Diffraction (XRD) result shows that the formed phase is pure Fe. It is reinforced by the Energy Dispersive Spectroscopy (EDS) result, which shows that the more lumps on the steel surface, the fewer Fe elements, and the more FeO corrosion product. Scanning Electron Microscopy (SEM) results show the presence of lumps of various sizes and black holes resulting from corrosion.
Karakteristik Elektrik Implementasi Membran Kitosan-Karagenan dan Jembatan Garam pada Microbial Fuel Cell Menggunakan Substrat Limbah Singkong Terfermentasi Yeast Ferina Srinurfitri; Amir Supriyanto; Gurum Ahmad Pauzi; Junaidi Junaidi
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 3 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i3.116

Abstract

A Microbial Fuel Cell (MFC) is an electrochemical system that generates energy utilizing waste as a substrate and the results of microbial metabolism processes. This research utilizes yeast fermented cassava waste as a substrate to determine the electrical characteristics of PEM in the form of a chitosan-carrageenan membrane and salt bridge. The cassava waste is from the waste produced in the manufacture of tapioca flour. A dual-chamber MFC made of acrylic with a size of 8x8x10 cm is used. Cassava waste substrate with carbon electrodes would be in the anode compartment, and seawater electrolyte with Cu(Ag) fiber electrodes would be in the cathode compartment. Each measurement holds ±250 ml in each compartment. The MFC system consists of 10 cells and is analyzed every hour for 120 hours using a multitester. According to the results of the research, cassava waste (liquid and onggok) can be used as a substrate in the MFC system, which has the potential to produce alternative electrical energy. Compared to salt bridges, the use of PEM in the form of chitosan-carrageenan membranes produces more significant and better electrical characteristics. However, the chitosan-carrageenan membrane is still less suitable in the long term than the salt bridge.
Design of Computer Based 12 Lead ECG Using STM32F401 Microcontroller Reyhan Issatyadi Darmawan; Arf Surtono; Donni Kis Apriyanto; Amir Supriyanto
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 4 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i4.127

Abstract

The research of designing computer-based 12 lead ECG using STM32F401 microcontroller has been done. ECG is a healthcare device recording heart electrical activity and assesses heart condition. ECG was chosen for health condition check-ups because it is low-cost and can monitor heart conditions in real-time. To get more details about a heart condition, an ECG with more than one lead is required, of which 12 leads are used for diagnostic application. The designed ECG uses a computer to display and record the ECG signal from the human body using a GUI program created with Visual Studio 2019, capable of recording 12 leads simultaneously and using USB to connect to the computer. STM32F401 is used as a digital signal processor to filter the ECG signal to make a good quality and noise-free ECG recording. Specifying the designed 12 lead ECG is a signal gain of 384 times with error less than 5%, 115.05 dB CMRR, and 0.05-200 Hz frequency response suitable for diagnostic application. The ECG was also capable of recording ECG signals from the human body.
Pengaruh Variasi Konsentrasi Inhibitor Ekstrak Daun Kakao (Theobroma Cacao) Terhadap Laju Korosi Baja ST 37 Dalam Larutan HCl 3% Syafriadi Syafriadi; Risca Adriana; Agus Riyanto
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 1 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i1.35

Abstract

The effectiveness of cacao leaf extract (Theobroma Cacao.) used as an inhibitor on St 37 steel sample. Which cures in HCl 3 % Corrosive Medium for 144 hours, the inhibitor concentration variation added 0 %, 3%, 6 %, 9 %, and 12 %, respectively. The sample rate is measured by using the loose-weight method. The results show that the lowest sample is 1.397 mm/y of 12%, and the highest is 3.694 mm/y of 0 %. Inhibitor efficiency to the sample St 37 Stainless steel portrays adequate progress to 62.66% with 12% concentration. X-Ray Diffraction Results acquired BCC with Fe-a phase along with SEM that forms an agglomeration, cracked, and holes which result in its corrosion. In addition, EDS contains FeO Element, which indicates that stainless is still affected by corrosion and the reduced FeO content in the sample was less. Thus three samples characterized and measured show that avocado leaves effectively as an inhibitor to the sample St 37 in HCl 3% corrosive medium.
Heating Rate Control in Electric Furnace with SSR and K-Type Thermocouple Using Arduino Uno Atmega 328P Bayu Ega Pratama; Gurum Ahmad Pauzi; Sri Wahyu Suciyati; Amir Supriyanto
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 1 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i1.117

Abstract

Electric furnace is a tool that can be used to melt, heat, and change the physical shape of a substance. Electric furnaces sold in the market are still relatively expensive, therefore it is necessary to make an electric furnace at a low cost. This research designed an electric furnace using a K-type thermocouple sensor as a temperature reader and SSR relay as an ON/OFF heater control . Keypad serves to enter the temperature value in the heating furnace. The heating element used is 1 mm in diameter and 1.86 ohm resistance with a load of 21 Ampere, capable of heating a C1 type refractory brick furnace that has been tested to a temperature of 1000 OC. The results of temperature reading sensitivity tests against the type-K thermocouple sensor get a coefficient value of 0.99893, this indicates that the thermocouple sensor is worth using. From the electric furnace test thermocouple sensor has an average accuracy rate of 92.07%, as well as errors worth 7.93%. While there is a precision value of 98.786% which shows the system works optimally.
PENGARUH PENAMBAHAN ABU TONGKOL JAGUNG TERHADAP SIFAT FISIS DAN MEKANIS PADA MORTAR Pulung Karo Karo; Rio Orlando Pratama; Roniyus Marjunus
Journal of Energy, Material, and Instrumentation Technology Vol 4 No 1 (2023): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v4i1.142

Abstract

The research was carried out about the effect of adding corn cob ash on mortar's physical and mechanical properties. Mortar was molded with three compositions, i.e., portland cement, corn cob ash, and corn husk fiber. Corn cob ash was burned at a temperature of 700  for 2 hours. Corn husk fiber was mechanically sliced up to 0.8 mm in size. Then, mortar molding and maintenance were processed for 28 days. The mortars that had reached the age of 28 days were tested according to the Indonesian National Standard (SNI), including physical properties (density) and mechanical properties (compressive strength, flexural strength, splitting tensile strength). Characterization of microstructure, morphology, and composition of all elements on the mortar's surface was processed using Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS). The research results show the influence of adding corn cob ash on mortar's physical and mechanical properties. The mortar with the most optimum physical and mechanical properties has a composition of 82:6:12. The characterization results using SEM-EDS show that the surface of this composition sample is better than other samples. The most dominant elements in the mortar are elements of Ca and Si, which function as mortar binders and hardeners.

Page 6 of 13 | Total Record : 121

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