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Jurnal Teknologi
Published by Politeknik Negeri Lhokseumawe
ISSN : 14121476     EISSN : 25500961     DOI : http://doi.org/10.30811/teknologi
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
Jurnal Teknologi is a peer-reviewed journal that aims at the publication and dissemination of original research articles on the latest developments in all fields of technology and engineering sciences. The journal publishes original papers in Indonesian and English, which contribute to the understanding of engineering science and the improvement of engineering technology. Papers may be theoretical, experimental, or both, and applied engineering science and technology. The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere. The scope of Jurnal Teknologi includes a wide spectrum of technology and engineering science subjects including: Civil engineering; Mechanical engineering; Chemical engineering Electrical engineering; Information and technology; Computer science and engineering; Materials science and engineering; Renewable energy engineering;
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 8 Documents
 1 
Search results for , issue "Vol 22, No 1 (2022): April 2022" : 8 Documents clear
Pembuatan Bioplastik dengan Penguat ZnO dan Penambahan Minyak Atsiri sebagai Anti Mikroba Fitri Takribiah; Harunsyah Harunsyah; Zuhra Amalia; Reza Fauzan; Muhammad Sami
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2881

Abstract

Environmental problems caused by petroleum-derived plastic waste has become an important issue because it is difficult to degrade the environment. Therefore, attempts have been made to speed up the process of degradation of the polymer material is to replace synthetic polymers with natural poimer. Starch is a natural polymer that can be used for the production of material that is easily degraded, the raw material is abundant, but has a weakness in its mechanical properties. To improve the mechanical strength of starch, a reinforcing material in the form of inorganic material is usually added in a polymer matrix. In addition to improving shelf life in a plastic made from natural polymers required additional antimicrobial. Therefore, bioplastics prepared by mixing cassava starch as a matrix, glycerol as a plasticizer, ZnO as an amplifier, and clove oil as an antimicrobial. The optimum conditions to produce bioplastics with the highest tensile strength of 23.40 kgf /mm2 given by the addition of 0.8% of ZnO and 0.4 ml clove oil. While the highest percent elongation on the addition of ZnO 1% and 0.4 ml clove oil which is 346.00%. Based on the test results of water resistance and biodegradability, clove oil shown to inhibit the growth of microorganisms bioplastics and bioplastic IR spectra do not show any new functional group.
Pengaruh Penggilingan POFA dan Fly Ash Terhadap Kuat Tekan Mortar dengan FAS 0,4 Siti Aja Aulia; Syamsul Bahri; Sulaiman AR; Syaifuddin Syaifuddin; Gusrizal Gusrizal
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2901

Abstract

POFA and fly ash are wates in the palm oil industry and electric generating power plant. This study aims to reduce the volume of these wastes in the field by grinding and being a substitute for cement in mortar mixtures. POFA and fly ash were each mada into a mortar with a percentage of 20% of the cement used. Before being used, each waste was first grinding 1000 cycles, 2000 cycles, 3000 cycles using a Los Angeles machine and also used POFA and fly ash 100% passing sieve #No.16 and 100% passing sieve #No.200. Furthermore, each waste is made of 50 mm x 50 mm x 50 mm cube specimens and wiill be tested for compressive strength at age of 1, 3, 7, and 28 days and also being tested for their porosity. The results showed that passing sieve #No.16 it means fly ash didn’t grinding reached a compressive strength of mortar about 58,22 MPa and its pororsity was 10,98%. The compressive strength of the mortar exceeds the control mortar by 36,68 MPa in 28 days. So it cn be concluded that the mortar with passing sieve #No.16 of fly ash can reduce the pororsity of the mortar so that it improves the compressive strength of the mortar.
Rancang Bangun Alat Keamanan pada Ruangan Menggunakan Arduino dan Sensor PIR Berbasis SMS Gateway Teuku Muhammad Razi; Ipan Suandi; Muhammad Muhammad
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2889

Abstract

The design of security devices in the room using Arduino and PIR sensors based on SMS Gateway has been carried out to anticipate security problems in the room. The purpose of this study is to design and build a security system in a room with a PIR sensor based on SMS Gateway, where when someone tries to steal, if the homeowner is at work or is far from the scene, they can immediately go to the location. The system is designed so that it can be activated and deactivated remotely via SMS (Short Message Service). The test method used is to determine the sensitivity of the sensor in detecting objects both at the closest and furthest distances to objects in the room. The results of the tests carried out are measuring the voltage when the tool is used, the sensitivity distance of the sensor and SMS commands and the response time of sending SMS. From the test results, it is found that this security system is able to provide or send a danger signal via SMS wherever we are. The results of the voltage measurement obtained are 5 volts on the PIR sensor, microcontroller, and SIM800 module. The PIR sensor used can detect movement with a maximum distance of 600 cm. The average SMS response time was 8.93 seconds.
PENGUKURAN APTITUDE DENGAN UJI KRAEPELIN MENGGUNAKAN METODE LINEAR CONGRUENTIAL METHOD (LCM) Qatrun Nada; Muhammad Arhami; Zulfan Khairil Simbolon
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2418

Abstract

Psychological tests are an important need in various spaces of human life. Not only related to matters of a clinical nature, psychological tests are also used in the workspace. Psychological tests are carried out as an effort to find out by knowing more about a person's personality. One of the methods used by psychologists is Kraepelin to get personality types. In practice, psychological tests in understanding an object, namely humans with all their attitudes and behavior, still use the old way. Psychological tests still use sheets or series of questions given to related objects and the calculation of results or assessments is still done manually. Errors in the assessment will affect the results so that it will lead to inappropriate perceptions. Making questions requires time and high accuracy, so the system is built using the Linear Congruential Method (LCM). LCM method is used to generate random numbers with better access time performance in terms of complexity and optimality. The 20 minute test application consists of 40 columns and 60 rows of questions with a time limit of 30 seconds for each column. The website-based Kraepelin test application can support all related parties, both the test organizers and test takers, to get real-time and accurate test results by applying the Kraepelin test using the LCM method. The implementation of the Kraepelin test is in accordance with the purpose of using the test, namely as a tool to measure aptitude (speed, accuracy, stability and work endurance). Based on the test results, the calculation of the score using the system will be faster with a calculation time of 2 seconds while the manual calculation is 5 minutes.
Desain Simulasi Visual HMI (Human Machine Interface) Antarmuka PLC guna Monitoring Data Parameter Air Syaiful Rachman; Muhammad Wahyu; Sarifudin Sarifudin; Zaiyan Ahyadi
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2861

Abstract

Desain sistem monitoring simulasi  pada parameter air kekeruhan,suhu,TDS,warna menggunakan HMI (human machine Interface) dikomunikasikan dengan peralatan PLC.Berdasarkan hasil simulasi  dan  ujicoba diperoleh nilai variable analog input yang diteliti adalah suhu diperoleh tegangan pada saat normal 2 derajat pada pengukuran pada alat ukur sebesar 2 mV, keadaan parameter air tidak normal dengan memberikan input data sebesar 3 derajat dan hasil pengukuran menunjukkan sekitar 3 mV. kekeruhan diperoleh pada saat normal 5 skala NTU  pada pengukuran sebesar 5 mV, Sedangkan pada keadaan tidak normal hasil dengan input data 6 skala NTU menghasilkan sekitar 6 mV. TDS diperoleh tegangan pada saat normal 1000 mg/l. Kemudian pada pengukuran menggunakan alat ukur volt meter diperoleh sebesar 1V, Sedangkan pada keadaan parameter air tidak normal input data sebesar 1500 mg/liter menghasikan nilai 1,5V. Warna air diperoleh tegangan pada saat normal 15 skala NTU  pada pengukuran pada alat ukur volt meter sebesar 15 mV, Sedangkan pada keadaan parameter air tidak normal hasil sekitar 16 mV. Sehingga pemilihan sensor harus dalam range nilai tegangan output dari perangkat sensor dan tranducer parameter air yang  harus menyesuaikan input dari analog PLC
Pengaruh Variasi Temperatur Tempering terhadap Kekerasan Baja JIS SUP 9A pada Mata Pisau Nanda Aulia Fadli; Adi Saputra Ismy; Irwin Syahri Cebro
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2891

Abstract

The effect of tempering temperature variations on the hardness of the blade has been carried out on SUP 9A leaf spring steel material. The tempering process was carried out at temperatures of 300°C, 400°C, and 500°C with a holding time of 15 minutes and cooled in free air. Specimens without heat treatment and tempering results were tested for hardness using the Rockwell hardness test method and microstructure analysis using an optical microscope. From the results of the study, it was found that the hardness value obtained on the raw material specimen without heat treatment obtained a hardness value of 60.50 HRC, while the tempering temperature variation obtained the hardness value on specimen B (tempering temperature 300°C) of 66.90 HRC, specimen C (tempering temperature 400°C) of 64.70 HRC, while specimen D (tempering temperature 500°C) obtained a hardness value of 65.80 HRC. From the results of the specimen hardness test, the hardness value after heating was higher than the hardness value without heating treatment. Microstructural analysis shows that the higher the given temperature, the larger the grain of the steel structure looks. Without heat treatment the microstructure of the specimen is an irregular black bainite. Meanwhile, by heat treatment, the microstructure of the specimen is irregular black martensite.
Kajian Pengaruh Rapat Arus pada Pelapisan Hard Chrome terhadap Kekerasan Permukaan Baja Karbon Rendah (ST 37) Nurdin Nurdin; Ichsan Maulana; Yuniati Yuniati; Ismi Amalia
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2902

Abstract

AbstractThe hard chrome process is one of the most widely used metal finishing methods to avoid corrosion, besides that hard chrome can improve metal quality such as hardness. The Hard chrome process is carried out by varying the current density of 30 Amp/dm2, 30 Amp/dm2, 40 Amp /dm2 and 50 Amp/dm2 with a coating time of 40 minutes at a solution temperature of 50 ᵒC. After the hard chrome process, the surface hardness test was carried out using a microvickers indent with a loading of 25 g.f. The results showed that the layer thickness and hardness increased when the current strength increased. The highest hardness value occurred at a current of 4 amperes of 551.6 VHN and a layer thickness of 1.80 microns.
Penggunaan Amilum sebagai Pelapis Anti Korosi pada Baja Karbon dalam Lingkungan Asam Klorida 0,5 M Muhammad Salahuddin; Irwan Irwan; Cut Aja Rahmawati
Jurnal Teknologi Vol 22, No 1 (2022): April 2022
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v22i1.2876

Abstract

The purpose of this paper was to determine the affect of amylum concentration and immersion time on the corrosion rate. Amylum is used as an anticorrosive coating on carbon steel in 0,5 M hydrochloric acid  environment. Amylum concentration and immersion time affect the corrosion rate. The longer immersion time, the corrosion rate increases while the higher the concentration, the corrosion rate decreases. The highest corrosion rate was obtained at 3.58 mpy while the lowest corrosion rate was 1.24 mpy, Corrosion rates in metals can be prevented by the coating method

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