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INDONESIA
Jurnal Instrumentasi
Published by Badan Standardisasi Nasional
ISSN : 01259202     EISSN : 24601462     DOI : 10.31153
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemistry Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology
The scientific areas covered by Instrumentasi are those backboned by scientific measurements and thus range from instrument engineering, metrology, testing, and control. All papers submitted are refereed by bona fide reviewers from leading research institutions as well as universities prior to publication to keep their quality meet the standard of the journal. The review is carried out mainly on the basis of originality, novelty, and contribution to scientific measurement. Authors need to complete the ethical clearance form for publication.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 150 Documents
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PROTOTIPE SISTEM PENGUKURAN DEBIT AIR PADA SALURAN TERBUKA BERBASIS V-NOTCH WEIR DAN DIFFERENTIAL PRESSURE TRANSMITTER Rustandi, Dadang
Instrumentasi Vol 40, No 2 (2016)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v40i2.135

Abstract

Sebuah prototipe sistem pengukuran debit air pada saluran terbuka berbasis V-Notch Weir dan Differential Pressure Transmitter telah dibuat dengan tujuan agar hasil pengukuran dapat dibaca secara langsung dan ditransmisikan ke instrumen lainnya. Sebelumnya, hasil pengukuran tidak dapat dibaca secara langsung, tetapi harus dihitung terlebih dahulu berdasarkan indikasi tinggi muka air yang terbendung oleh weir. Tujuan tersebut dapat dicapai dengan menerapkan instrumen Differential Pressure Transmitter yang diintegrasikan dengan Programmable Panel Meter. Pada prototipe ini, V-Notch Weir 22,5° dipasang pada bak saluran terbuka berukuran 1,2 m x 0,6 m x 0,4 m yang diuji untuk mengukur debit pada rentang 0–0,67 l/s (0–40 liter/menit) dan diperoleh hasil ukur yang linier pada rentang debit 0,25–0,67 l/s (15–40 liter/menit) dengan rentang tinggi muka air 0,057–0,084 m (57–84 mm) serta menghasilkan luaran (output) Differential Pressure Transmitter pada rentang 4–12,96 mA. Penyimpangan terbesar hasil pengukuran sebesar 2,33%.
A DATA PROCESSING PROGRAM FOR WEB BASED RAIN GAUGE CALIBRATORS Maftukhah, Tatik; Wijonarko , Sensus
Instrumentasi Vol 43, No 1 (2019)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v43i1.178

Abstract

The purpose of this study was to produce an application program for the data processing unit of a web base rain gauge calibrator. The application program was developed using Studio XE2 of C ++ RAD (Rapid Application Development) software. Testing result shows that what you get was what you command or there was no different between the result and the command.
Pembangkit Pwm Sinusoida yang Diinjeksi Sinyal Harmonik Ketiga dengan Mikrokontroler Sebagai Penggerak Motor Induksi Tiga Fase Prajitno S, Santoso; Pinandito, Mego
Instrumentasi Vol 37, No 2 (2013)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v37i2.42

Abstract

Untuk mendukung kemampuan dalam aplikasi energi, baik untuk sarana industri maupun transportasi diperlukan kemampuan mengendalikan kecepatan putar motor induksi. Sumber PWM sinus yang telah ada tidak mampu mendayagunakan catu daya DC secara maksimal untuk penggunaan inverter sebagai sumber daya AC motor induksi tiga fase. Oleh karena itu, guna memaksimalkan pendayagunaan sumber DC untuk efisiensi pendayagunaan daya, berbagai teknik PWM masih terus dikembangkan. Telah dibuat suatu perangkat pembangkit gelombang sinus PWM tiga fase yang telah diinjeksi dengan harmonik ketiga dengan mikrokontroler ATMega128. Sumber sinyal PWM sinusoida yang digunakan pada penelitian ini telah ditambahkan dengan harmonik ketiga dengan amplitudo 16,6% dari sumber sinyal PWM sinusoida untuk frekuensi dari 6 Hz hingga 60 Hz. Katakunci: PWM sinusoida, injeksi sinus harmonik PWM ketiga, motor induksi tiga fase, pengaturan kecepatan motor induksi.
EFFECT OF STYLUS POSITION SHIFTINGS TO ECCENTRICITY AND ROUNDNESS VALUE IN GLASS HEMISPHERE MEASUREMENTS Kartika, Nadya Larasati; Rahman, Ardi; Nugraha, Asep Ridwan
Instrumentasi Vol 41, No 2 (2017)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v41i2.68

Abstract

In this research, the effect of stylus position shifting to eccentricity on hemisphere roundness measurement is examined in Research Center for Metrology LIPI (RCM-LIPI). The effect would give the acceptance eccentricity value for center adjustment of hemisphere. Least Square Circle (LSC) data fitting and Gaussian filtering were used in data processing. The result showed that until 3,3 µm shifting value with 3,23 µm in eccentricity the roundness values were constant. However, above this value, the roundness value starting to increase significantly and giving an uncertainty contribution to hemisphere measurement.  
THE FUTURE OF POWER SEMICONDUCTOR DEVICES ROLE IN SMART GRID IMPLEMENTATION IN INDONESIA Supono, I; Ardiatna, W
Instrumentasi Vol 39, No 2 (2015)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v39i2.96

Abstract

The use of power semiconductor devices as interfaces of distributed power generators in the smart grid is the key justification for the device advancement. It is the important forthcoming energy scheme for Indonesia to overcome the national electrical power shortage. The study of semiconductor devices focuses on their application in circuit breaker based on power semiconductor device, (solid-state circuit breaker/SSCB), which is a key element for the safety system in the smart grid scheme. An investigation on several devices in the market recommends a power semiconductor device type to be promoted in the near future for this specified application. The associated standardization infrastructure for the future of power device research, development and manufacturing in Indonesia is also presented. This paper presents the benefit of strengthening the role of power semiconductor devices in the electrical energy sector in Indonesia. It also shows that the IGCT will be the most promising device to be implemented in circuit breakers for transmission and distribution system.
Precision RF/MW Measurement Techniques and Standards at NMIJ/AIST A BROADBAND ATTENUATION MEASUREMENT SYSTEM Widarta, Anton
Instrumentasi Vol 42, No 2 (2018)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v42i2.162

Abstract

Abstract— An accurate-broadband attenuation measurement system was established at National Metrology Institute of Japan (NMIJ/AIST) to renew the Japan national standard of attenuation. The system works on the principle of intermediate frequency (IF) substitution technique using a calibrated resistive step-attenuator assembly as an IF reference standard. The standard is traceable to the voltage ratio of the inductive voltage divider (IVD) at frequency of 1 kHz. Some unique measurement techniques for achieving highly accurate measurements are presented and discussed in detail. The measurement capability of the system is 0 to 110 dB in the frequency range of 10 MHz to 50 GHz with the expanded uncertainties are from 0.002 dB to 0.068 dB. Keywords— radio frequency; microwave; power; attenuation; impedance; noise; measurement; standard; uncertainty.
COMPARISONS BETWEEN MEASUREMENT AND CALCULATION METHODS IN OBTAINING VIRTUAL WATER FOR HOME MADE YOGURT Wijonarko, Sensus; Sirenden, Bernadus; Maftukhah, Tatik; Rustandi, Dadang
Instrumentasi Vol 43, No 2 (2019)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v43i2.173

Abstract

The aim of this study was to get shadow water result comparisons for home industry yogurt using practical and theoretical methods. The embodied water obtained from the empirical technique was 20.2 liters, namely 3.8 liters lower than the mathematical technique. The differences of the embedded water between two methods were caused especially on one side the producer did not optimize the water potential to absorb the heat, but on the other side the producer did not pay any attention to the regulation in disposing the waste water that should not be higher than its threshold level. The consumption of exogenous water could be decreased if the cooling water was recycled, water heat was dissipated using natural air, and the unused milk was consumed by cattle.
INVESTIGASI GEJALA HISTERESIS PADA TERMOMETER TAHANAN PLATINA Erawan, Dede
Instrumentasi Vol 37, No 1 (2013)
Publisher : National Standardization Agency of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v37i1.8

Abstract

The hysteresis of a platinum resistance thermometer (PRT) affects significantly the uncertainty of temperature measurement by this sensor. This phenomenon is hard to measure at the time whenthe PRT is calibrated so that its contribution to the measurement uncertainty in the calibration is frequently determined in reference to external information or previous measurements.This paper describes measurement of hysteresis on some PRTs in some common measurement spans covering 0ºC to 150ºC, 100ºC to 300ºC and 350ºC to 500ºC. The measurement is based on Zwak’s hypothesis that the largest hysteresis occurs at the middle of the temperature span and the smallest at each end of the increasing and decreasing temperature curves. The magnitude of the hysteresis depends on the width of the temperature span and the PRT hysteresis coefficient.The measurement result shows that the PRT resistance difference at the same temperature obtained when temperature is increasing and decreasing is maximum just at the lowest point of the corresponding span, then gets smaller as the temperature increases, and reaches zero at the highest point. The largest value in the three temperature spans is 0.0044ºC, 0.15ºC and 0.056ºC respectively. Key words: Platinum resistance thermometer, hysteresis, measurement uncertainty.
METODE PENGUKURAN PENYIMPANGAN BALOK SUDUT MENGGUNAKAN AUTOCOLLIMATOR DAN SELF-CALIBRATION ROTARY ENCODER Ridwan Nugraha, Asep; Novyanto, Okasatria; Alfiyati, Nurul
Instrumentasi Vol 38, No 2 (2014)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v38i2.69

Abstract

ABSTRAKDalam lingkup metrologi sudut, balok sudut dan poligon termasuk material artifact standards. Secara umum, autocollimator dan meja indeks yang memiliki akurasi tinggi digunakan untuk menentukan nilai penyimpangan balok sudut dan poligon. Puslit Metrologi-LIPI bekerja sama dengan NMIJ dan NIMT untuk membuat standar sudut baru bernama self-calibratable rotary encoder. Di Indonesia, metode pengukuran penyimpangan balok sudut dengan menggunakan autocollimator dan standar sudut self-calibratable rotary encoder ini belum pernah dilakukan sebelumnya. Pengukuran penyimpangan balok sudut dilakukan sebanyak lima kali pada posisi normal dan posisi kebalikannya pada nominal sudut 10”, 5’, 30’, 5° dan 30°. Pengukuran ini dilakukan di Laboratorium Metrologi Panjang Puslit Metrologi-LIPI pada suhu (20,0 ± 0,3) °C dan kelembapan (50 ± 10) %. Hasil pengukuran ini divalidasi dengan nilai yang diperoleh oleh LNE dan dianalisis dengan menggunakan metode statistik nilai En dan Birge ratio. Hasil perbandingan menunjukkan pada nominal sudut 10”, 30’, 5°, dan 30° berada pada rentang nilai yang memenuhi kriteria angka En, dengan nilai terbesar En 0,88 dan RB 1,77 pada sudut 30°. Hal ini menunjukkan bahwa metode pengukuran penyimpangan balok sudut menggunakan standar self-calibratable rotary encoder telah valid dan juga metode ini mampu meningkatkan ketidakpastian pengukuran sebesar 68,8%.Kata Kunci: autocollimator, balok sudut, metode pengukuran, rotary encoder, SelfA47
PERANCANGAN SISTEM PENGHASIL GETARAN ARTIFISIAL PADA RENTANG UKUR FREKUENSI SANGAT RENDAH UNTUK LAYANAN KALIBRASI SEISMOMETER Habibie, Muhammad Haekal; Hermawanto, Denny; Prasasti, Ninuk Ragil; Sirenden, Bernadus Herdi; Boynawan, Ahmad Mohammad; Zaid, Ghufron; Prawito, Prawito
Instrumentasi Vol 40, No 2 (2016)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v40i2.34

Abstract

Vibration exciter merupakan sistem pengukuran penghasil getaran artificial yang dapat bekerja dalam rentang ukur frekuensi tertentu. Vibration exciter dibutuhkan untuk menjawab kebutuhan permintaan kalibrasi alat ukur dengan lingkup very low frequency vibration, seperti sensor seismometer untuk mitigasi bencana gempa bumi. Perancangan penelitian ini terbagi menjadi dua bagian, yakni melakukan perancangan bagian elektronika dan perancangan bagian mekanika. Secara umum, sistem vibration exciter yang dibuat bekerja dengan cara memasukkan nilai PWM ke Arduino Uno yang menentukan nilai duty cycle dan memberikan tegangan kepada motor DC sebagai aktuator sehingga menimbulkan percepatan angular. Meja getar dari plat aluminium terhubung dengan motor DC dengan menggunakan connecting rod akan bergerak maju dan mundur secara translasi. Nilai pergerakan maju dan mundur akan dideteksi oleh sensor accelerometer dengan menggunakan conditioning amplifier akan mereduksi noise dari pengukuran yang dilakukan. Nilai frekuensi dan percepatan dari meja getar dapat dianalisis dengan metode transformasi Fourier dengan menggunakan pulse analyzer.

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