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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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cover instrumentasi instrumentasi instrumentasi
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.286

Abstract

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DEVELOPMENT OF OFFICIAL INDONESIA STANDARD TIME : TEMPERATURE CONTROL SYSTEM FOR CAESIUM ATOMIC CLOCK Windi Kurnia Perangin-Angin; Mohamad Boynawan; Ratnaningsih Ratnaningsih
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.242

Abstract

Every country should have an official time standard which called local coordinated universal time, UTC(k). Badan Standardisasi Nasional (BSN) has developed an official standard time, namely UTC(IDN) which is used as Indonesia Standard Time. The UTC(IDN) contributes to calculation of coordinated universal time (UTC). In order to generate the UTC(IDN), the output of 1 pulse per second signal of caesium atomic clock is utilized as the actual signals of this standard. A distribution amplifier is used to distribute the signal. Combination of time transfer system (TTS-3) and GPS are employed for comparison of UTC and UTC(IDN). TTS-3 automatically calculated the difference and it is steered by using certain algorithm. Time synchronization to the standard can be conducted through network time protocol (NTP) server, i.e., ntp.bsn.go.id. The time can be automatically synchronized using internet time or certain program at each computer or machine. The results of this work show that the time differences between UTC – UTC(IDN) vary from 43.2 ns to 1729.9 ns. UTC(IDN) has frequency and time stability of 3.6 x 10-14 Hz/Hz per 5 days and 3.1 ns per 5 days, respectively which are in good agreement to the international time reference. A shielding chamber with temperature control system has been built to keep the ambient temperature of caesium atomic clock at (23 ± 1) ᵒC. It can be concluded that BSN has been developing and disseminating the UTC(IDN) as an Indonesia Standard Time that can support the regulation of time synchronization in Indonesia. A new temperature control system is proposed to stabilize the ambient temperature of caesium atomic clock. The temperature control system supports an accurate and stable UTC(IDN).
INDUCTANCE VALIDATION OF LCR METER AFTER RECALIBRATION Lukluk Khairiyati; Muhammad Azzumar; Miftahul Munir; Mohamad Syahadi
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.258

Abstract

Laboratory of National Measurement Standard for Electricity and Time (NMS ET Lab) has validated the measurement results pre and post the LCR meter recalibration process on inductance parameters. The validation process was carried out at nominal values of 100 μH, 1 mH, 10 mH, 100 mH and 1 H in accordance to the reference standards. The direct measurement method was used to measure the inductance parameter of LCR meter with standard inductor. Validation is carried out by comparing the measurement results pre and post the LCR meter recalibration process at SCL - Hong Kong. Based on the En number analysis, the values between -0.21 to 0.44 were obtained for 5 measurement points, therefore the calibration system and method used by NMS ET Lab are valid and have measurement results that are equivalent to other countries.
VALIDASI METODE PENGUJIAN KLORIDA PADA URANIUM DIOKSIDA DENGAN METODE TIDAK LANGSUNG MENGGUNAKAN SPEKTROFOTOMETER SERAPAN ATOM Fikri Ahmad Furqan; Deni Mustika; Rahmiati Rahmiati; Torowati Torowati; Asminar Asminar
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.235

Abstract

Metode tidak langsung pengujian klorida dilakukan dengan mereaksikan klorida dengan perak berlebih, kemudian kadar perak sisa yang tidak bereaksi dihitung. Penelitian ini bertujuan untuk mengetahui kelayakan suatu metode melalui beberapa parameter, seperti linieritas, akurasi dan presisi, limit kuantitasi, dan limit deteksi instrumen pada sampel tanpa matriks (A), sampel UO2 dengan penambahan larutan standar Cl setelah ekstraksi (B) dan sampel UO2 dengan penambahan larutan standar Cl sebelum ekstraksi (C). Diperoleh nilai regresi linier pada sampel A sebesar 0,997, pada sampel B sebesar 0,996, dan pada sampel C sebesar 0,995. Nilai recovery yang didapat pada sampel A sebesar 102,804 %, pada sampel B sebesar 98,924 %, dan pada sampel C sebesar 98,096 %. Nilai simpangan baku relatif yang didapatkan pada sampel A sebesar 1,4 %, pada sampel C sebesar 0,2 %, dan pada sampel B sebesar 0,5 %. Nilai limit deteksi pada sampel dengan matriks yang didapat dengan metode ini, yaitu 0,0958 µg/g dan 0,1024 µg/g, sedangkan nilai limit kuantitasi pada sampel dengan matriks yaitu 0,3195 µg/g dan 0,3415 µg/g. Berdasarkan hasil penelitian, dapat dinyatakan bahwa metode tervalidasi dan layak diterapkan di Laboratorium Kendali Kualitas – Instalasi Elemen Bakar Eksperimental.
STUDI RANDOM ERROR PADA PENGUKURAN MIKROTREMOR SERTA IMPLIKASINYA TERHADAP PERHITUNGAN Vs30 DAN KETEBALAN SEDIMEN Ashar Muda Lubis; Muttaqin Muttaqin; Rida Samdara
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.255

Abstract

Telah dilakukan penelitian random error pada pengukuran mikrotremor dengan peralatan PASI MOD GEMINI 2 SN-1405. Pada penelitian ini juga dikaji implikasi perbedaan hasil perhitungan frekuensi dominan () dan amplifikasi situs () pada pengukuran mikrotremor terhadap kecepatan rata-rata gelombang geser hingga kedalaman 30 m (Vs30) dan ketebalan sedimen (h ) untuk pengklasifikasian jenis tanah. Pengambilan selama 2018-2019 telah dilakukan untuk memperoleh 100 hari data mikrotremor dengan durasi selama 30 menit di Kota Bengkulu. Kurva-kurva H/V telah dianalis untuk mendapatkan nilai-nilai dan . Pada penelitian ini diperoleh ketelitian pengukuran yang sangat baik untuk dan  dengan persentase kesalahan pengukuran <1%. Secara statistik, nilai-nilai dan yang diperoleh mememuhi fungsi distribusi normal. Hasil penelitian ini memiliki implikasi dan dampak terhadap estimasi nilai Vs30 dan h dimana meskipun pengambilan data dilakukan pada tempat yang sama dengan kondisi geologi yang juga sama, akan tetapi memberikan variasi yang signifikan terhadap nilai Vs30 karena pengaruh range nilai dan . Sebagai akibatnya perkiraan klasifikasi tanah pada suatu tempat yang sama didaptkan berbeda. Kedepan pengukuran mikrotremor untuk suatu stasiun memerlukan pengukuran yang berulang sehingga interpretasi klasifikasi tanah didapatkan lebih tepat dan akurat karena dapat mengungkap hasil yang sebenarnya.
MEASUREMENT UNCERTAINTY OF WINDING TEMPERATURE RISE ON WASHING MACHINE HEATING-TEST Himma Firdaus; Nanang Kusnandar
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.239

Abstract

Evaluation of measurement uncertainty in safety tests is critical for a testing laboratory, especially if many aspects influence the test results, such as in the washing machine heating test. While performing the heating test, the temperature rise of the motor winding was determined to evaluate the safety level of a washing machine. The temperature rise is obtained by the resistance method, which measures the change of winding resistance to assess its temperature rise. In this work, the washing machine was loaded at maximum capacity and supplied with hot water. All factors contributing to the measurement uncertainty originating from both the measurement system and the testing method are evaluated. The expanded uncertainty of the temperature rise measurement obtained in this study is 1.4%.  This uncertainty is mainly contributed by the variance of test water temperature (0.54%), calibration uncertainty of RCL meter (0.43%), and calibration uncertainty of temperature logging system (DLS) (0.31%). Therefore, the heating test requires a tight temperature controller, an improved calibration uncertainty of the resistance meter, and a better accuracy of the temperature logger to reduce the measurement uncertainty.
SIMULASI PENGARUH PERUBAHAN LAJU ALIRAN AIR TERHADAP TINGGI MUKA AIR PADA SISTEM PENGENDALIAN TINGGI MUKA AIR MENGGUNAKAN KONTROLER PID STUDI KASUS: SIMULATOR UNTUK PENGUKURAN DAN PENGENDALIAN PROSES DI INDUSTRI DAN SCADA. Iwan Rohman Setiawan
Instrumentasi Vol 45, No 2 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i2.259

Abstract

Menyelidiki pengaruh perubahan laju aliran air terhadap tinggi muka air di dalam tangki, pada sistem pengendalian tinggi muka air di dalam tangki menggunakan kontroler PID-single loop dan sistem pengendalian bertingkat. Percobaan dilakukan  melalui simulasi menggunakan Simulink, dengan terlebih dahulu membuat pemodelan untuk setiap komponen yang digunakan pada simulator. Set point tinggi muka air di dalam tangki 0,3 m. Ketika tinggi muka air dalam keadaan steady, menaikan laju aliran air mulai dari 5x10-5 m3/detik sampai dengan 1x10-4 m3/detik. Selanjutnya menurunkan laju aliran mulai dari -6,6667x10-5 m3/detik sampai dengan -1,1667x10-4 m3/detik. Akibat kenaikan laju aliran air  pada sistem pengendalian tinggi muka air-sistem pengendalian bertingkat, tidak mempengaruhi tinggi muka air di dalam tangki. Sedangkan pada sistem pengendalian tinggi muka air di dalam tangki-single loop, mengakibatkan tinggi muka air mengalami kenaikan, walaupun tinggi muka air di dalam tangki kembali ke set point yaitu 0,3 m. Begitu juga ketika laju aliran yang menuju tangki diturunkan mulai dari 5x10-5 m3/detik sampai dengan -8,3333x10-4 m3/detik, tidak mempengaruhi tinggi muka air di dalam tangki pada sistem pengendalian-single loop dan sistem pengendalian bertingkat. Ketika laju aliran diturunkan mulai dari -1x10-4 m3/detik, maka tinggi muka air berkurang dan tidak dapat mencapai set point kembali.
Electromagnetic Test Environments Analysis for EMI Measurements Dwi Mandaris; Hutomo Wahyu Nugroho; Yoppy Yoppy; Tyas Ari Wahyu; Elvina Trivida; Yudhistira Yudhistira
Instrumentasi Vol 45, No 1 (2021)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v45i1.240

Abstract

This paper presents an analysis and review of different electromagnetic (EM) test environments for Electromagnetic Interference (EMI) measurements to verify its advantages or disadvantages and to obtain the correlation between those environments, namely: semi-anechoic chamber (SAC), fully anechoic room (FAR), classical reverberation chamber (RC) and vibrating intrinsic reverberation chamber (VIRC). The first analysis is based on literature studies from previous research by analyzing four key parameters: power-to-electric field ratio, the frequency range, equipment under test (EUT) size, and on-site measurement applicability. In order to verify their correlation, further investigation was done by radiated emission (RE) measurement of dummy EUT, simple monopole, in those environments. The literature study concluded that each test environment has advantages and drawbacks concerning some aforementioned evaluation. The existing SAC environment showed more established technique, but expensive and time-consuming. However, despite the small limitation on susceptibility and dwell time, RC, in particular VIRC, delivers potential and promising technique, with statistically good E-field uniformity, more time-efficient and on-site measurement applicability. The radiated emission simulation and measurement results of monopole antenna confirmed their correlation and the E-field strength graph showed a considerably similar pattern, except for frequency range 1.6 to 2 GHz where null radiation pattern occurs for some azimuth angle.
UNCERTAINTY EVALUATION ON THE CALIBRATION OF DC & AC CURRENT GENERATED BY COMBINATION OF AC/DC CURRENT SOURCE AND CURRENT COIL USING SUBSTITUTION METHOD Lukluk Khairiyati; Hayati Amalia
Instrumentasi Vol 44, No 2 (2020)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v44i2.210

Abstract

Development of measurement method for calibrating current coil continues to be made to maintain measurement traceability for high DC and AC current scope which are generally used for clamp meter calibration services in Laboratory of National Measurement Standard for Electricity and Time (Lab NMS ET). This paper describes the uncertainty evaluation method developed in Lab NMS ET for calibrating high DC and AC current from 50 A up to 990 A generated by a single system consisted of a DC/AC current source and a 50-turn current coil. The uncertainty analysis was carried out based on the calibration principle using the substitution method combined with the principle of multiplication between output current of a DC/AC current source and a 50-turn current coil. It resulted in six source of uncertainty component derived from the current source, the current coil, and a meter. Their sensitivity coefficients were calculated as well to adapt the unit of each uncertainty budget to the final unit in Ampere (A). Using this uncertainty evaluation principle, at the measuring range of 50 A to 990 A, the expanded uncertainties for DC current were spanned from 0.69% to 1%. As for AC current, they were spanned from 0.8% to 1.4%. The major uncertainty contribution comes from the current coil which is representation of uncertainty due to various factors affecting the current coil performance. Validation had been carried out and the normalized error (EN number) values were in the range -0.48 to -0.16 for DC current measurements and in the range of -0.06 to 0.16 for AC current measurements.
GPS Logger Development Using an Atmega 2560 Microcontroller Purwowibowo Purwowibowo; Sensus Wijonarko; Tatik Maftukhah
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.v43i2.180

Abstract

Although the applications of GPS navigation have been widely used, the implementations of GPS logger currently are still scarce. GPS loggers are able to keep locations in form of coordinates and UTC, so that the data might be accessed later on using SD cards equipped in the devices. The purpose of this research was to create a GPS logger using an open source microcontroller system to maintain flexibility in development. A Mega ADK Arduino board and a GPS shield Ublox Lae-6H ware used. Furthermore the device was provided with a Thin Film Transistor (TFT) display and a SD module. The received data ware displayed on the TFT in coordinates of latitude, longitude and altitude. To get the accuracy level, measurement results of the GPS logger was compared with measurement results from other GPS products in several places. According to the comparison, the average accuracy of the GPS logger was less than 2 meters.

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