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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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RANCANG BANGUN PROTOTIPE MANOMETER GAS DIGITAL YANG TERKALIBRASI OLEH STANDAR PRIMER PRESSURE BALANCE Prakosa, Jalu Ahmad
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.v37i1.10

Abstract

To meet market needs and become independent for technology, Domestic and calibrated of digital manometer products is urgent. The purpose of this study is to create a prototype of digital gas manometer that calibrated to guarantee the truth measurement in international. The designing and creating of digital manometer that traceable to gas pressure calibration system, pressure balance has been done at pressure laboratory of Puslit KIM LIPI. ATmega328 microcontroller on the Arduino Uno board is used to acquire the output voltage data of pressure sensor MPX5500DP by using 10 bit Analog to Digital Converter (ADC) and communicates serially via the PC with USB port also displays the measurement results in real time with Liquid Crystal Display (LCD). From the results of calibration and measurement in the measuring range of 50-370 kPa obtained that the average maximum absolute error of reading is 0.198% while the largest maksimum absolute errors contained in the measuring point of 50 kPa is 1.003% and the smallest maximum absolute error contained in the measuring point of 330 kPa is 0.058%. The ratio of the economic benefits of this digital gas manometer is approximately to four point three than similar products made overseas that has been on the market so it is worth to be further developed to the stage of incubation. Key words: digital manometer, calibration, Arduino Uno, pressure balance
ANALYSIS ON THE INFLUENCE OF PRESSURE ADJUSTMENT REFERENCE IN PRESSURE GAUGE CALIBRATION BASED ON DKD-R 6-1: 2014 GUIDELINE Adindra Vickar Ega; Rudi Anggoro Samodro
Instrumentasi Vol 41, No 1 (2017)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v41i1.82

Abstract

DKD-R 6-1 is a widely used reference document in pressure measuring device (PMD) calibration. However, many of the users do not understand exactly the substance of it. As for example the pressure adjustment during the calibration is based on the reference (STD) reading or the unit under test (UUT) reading, according to the DKD-R 6-1 clause 7 Calibration Method. Therefore, in this research, calibration of barometer as one of PMD, from range 850 hPa to 1050 hPa has been performed to analyze the influence of those two methods to the calibration results and the difficulty or ease in measurement process. The result shows that both methods has different correction of 0,01 hPa, relevant with the uncertainty claim of 0,06 hPa at 850 hPa and 0,05 hPa at 1050 hPa respectively. Measurement by pressure adjustment according to the UUT reading is easier to be performed since UUT has less digit resolution than the reference standard. However, the reading stability of the reference standard needs to be taken into account since it has more digit resolution, in order to get more accurate measurement results. Keywords : barometer, pressure adjustment, DKD-R 6-1, reference standard, UUT
Characterization of 1D Grating Standard for National Laboratory Comparison Using Scanning Electron Microscope Asep Ridwan Nugraha; Ardi Rahman; Beni Adi Trisna
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.v42i2.159

Abstract

Nanometrology, which is dimensional metrology on the nanometer scale, is rapidly gaining importance. In Nanometrology, length standard traceable measurements are required to certify the values obtained from measurements. Standard Reference Material (SRM) is a sample for calibrating the magnification scale of a Scanning Electron Microscope (SEM). The standard are produced by recording a precision, laser-generated, interference pattern using photosensitive materials and other processing steps. This fabrication technique provides an accurate measure of the period of the line-space. Some of the critical quality attributes of a pitch standard are (1) the fundamental pitch distance, (2) the uniformity of the pitch, (3) the quality of the line edge roughness, (4) the imaging contrast that it produces, (5) the accuracy of the certified pitch value, and (6) the traceability of the certified pitch value to an internationally recognized standard. In this paper, we describe characterization of 1D grating standard with nominal 700 nm and 300 nm using SEM and its measurement uncertainty. The measurements were performed at 10 differents measurement position at each nominal. Total number of pitch at all measurement position in each nominal was 180. An image was taken at each measurement position. The average pitch of them represents the pitch value of the specimens. The results shows measured pitch for nominal 700 nm is 700.3 nm and 300 nm is 293.6 nm with measurement uncertainty for nominal 700 nm is 5.5 nm nominal 300 nm is 4.4 nm.
THE BIAS OF WEB BASED RAIN GAUGE CALIBRATOR DUE TO BUBBLES Sensus Wijonarko; Dadang Rustandi; Tatik Maftukhah; Mahmudi Mahmudi; Bernadus H Sirenden; Jalu Ahmad Prakosa; Purwowibowo Purwowibowo
Instrumentasi Vol 44, No 1 (2020)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/instrumentasi.v44i1.215

Abstract

This study was devoted to investigate the bias due to entrapped air - in the cylindrical tube water - to a web based rain gauge calibrator (WBRGC). This study was carried out in laboratory temperature around 25 °C using experiment method, especially by comparing the massof the water with and without bubbles. The entrapped airusedthe space for1.57 gof 1009 g ofwater if there were no bubbles, so this condition madebiasaround - 0.16 %.This bias was very significant in contributing the uncertainty of WBRGC, where in this case was 3 ml for 966 ml of water (0.31 %). Hence, this bias should be promptly overcome.
ANALYSIS OF MSL TG-13 PRESSURE GAUGE CALIBRATION METHOD Adindra Vickar Ega; R. Rudi Anggoro Samodro
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.v38i2.71

Abstract

Analysis of MSL TG-13 method by performing calibration of a 0.6% class-ranged 4,000 kPa pressure gauge had been conducted. The calibration was done by using a 0.1% class-ranged 40 bar test gauge as a standard. The purpose of the analysis was to verify the MSL TG-13 method with the widely used standard method Deutscher Kalibrierdienst (DKD-R 6-1). Parameters for the analysis were Error number (En) for the degree of equivalence of both methods, maximum error value according to the requirement in reference document BS en 837-1:1988 for each accuracy class. The result showed that MSL TG-13 method was consistent and complying with the widely used standard methods DKD-R 6-1, proven by En values ≤ 1 in each pressure point. The maximum error of pressure gauge, by using both methods, also complied with the requirement stated in BS En 837-1:1998, which was less than ± 0.6%. Therefore, MSL TG-13 method had been analyzed and could be implemented for pressure gauge calibration.
PENGEMBANGAN SISTEM KALIBRASI INTERNAL MESIN STANDAR GAYA TIPE LENGAN 1 MN Hafid Hafid; Nur Tjahyo Eka Darmayanti
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.v38i2.154

Abstract

Penelitian tentang pengembangan sistem kalibrasi internal mesin standar gaya tipe lengan 1 MN telah dilakukan. Pengembangan sistem kalibrasi pada mesin ini menggunakan nilai referensi mesin standar gaya tipe deadweight 20 kN dengan ketidakpastian 35 ppm. Kalibrasi dilakukan menggunakan metode baru yang dikembangkan oleh laboratorium melalui 3 tahapan. Tahapan pertama kalibrasi mesin standar gaya tipe lengan pada kapasitas 10 kN dan 20 kN. Tahapan kedua kalibrasi beban deadweight 10 kN dan 20 kN yang terdapat pada mesin standar gaya tipe lengan dan ketiga kalibrasi mesin standar gaya tipe lengan pada kapasitas 30 kN – 200 kN. Kalibrasi dilakukan menggunakan load cell 10 kN, 20 kN 50 kN, 100 kN dan 200 kN sebagai transfer standar gaya dengan indikator DMP40. Hasil penelitian menunjukkan bahwa kalibrasi menggunakan metode baru ini menghasilkan ketidakpastian yang lebih baik yakni tidak lebih dari 100 ppm, dibandingkan klaim ketidakpastian mesin sebelumnya yakni sebesar 150 ppm. Kata kunci: mesin standar gaya, mesin standar gaya tipe lengan 1 MN, kalibrasi internal mesin standar gaya tipe lengan.
INSTRUMENTATION DEVELOPMENT FOR RAINFALL INTERCEPTION MEASUREMENT ON A TREE USING WATER BALANCE METHOD Sensus Wijonarko; Tatik Maftukhah
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.v38i2.59

Abstract

A simplified but effective automatic measurement system has been built to give an additional alternative to the more complicated older version apparatus for rainfall interception metering on a representative tree of a subcatchment area. The equipment was installed on Regional Clean Water Company (PDAM) Air Serkuk Sub-Basin, Kubu Watershed, Belitung in 2014. The indirect way, called water balance or weighing method, was used in this study, so that the developed gauge consisted of some gages for gross rainfall, throughfall, stemflow, and canopy area measurements respectively on the selected plantation. Results revealed that the interception was about 11.36%. In other words, for every 100 mm rainfall, there was 11.36 mm interception on trees. Therefore, it was in the range of previous study results conducted by some former researchers in other places.Keywords: Instrumentation, instrument, interception, rainfall, water balance
PERBAIKAN AKUSTIK RUANGAN UNTUK ACARA PEMBUKAAN DAN PENUTUPAN DIKLAT MELALUI RENOVASI DI PUSBINDIKLAT LIPI Prof. Dr. Ir. Husein Avicenna Akil M.Sc.; Budhy Basuki
Instrumentasi Vol 40, No 1 (2016)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v40i1.140

Abstract

Pengukuran karakteristik akustik di dalam ruangan telah dilakukan untuk acara pembukaan dan penutupan pada kondisi sebelum dan setelah renovasi. Pengukuran sebelum renovasi memberi petunjuk bahwa kondisi akustik ruangan sangat buruk untuk menghasilkan kualitas akustik yang sesuai dengan peruntukannya. Oleh karena itu, ruangan tersebut direnovasi secara menyeluruh dan komprehensif. Hasil pengukuran parameter karakteristik akustik ruangan menunjukan bahwa pada kondisi ruangan sebelum renovasi menghasilkan nilai waktu dengung (reverberation time) rata-rata sangat besar, yaitu RT = 3,1 detik. Sementara itu, nilai waktu dengung rata-rata turun secara drastis setelah proses renovasi menjadi RT = 0,9 detik, terutama untuk frekuensi tengah pada rentang audibel pendengaran, yaitu 500 Hz–1 kHz. Distribusi suara sebelum renovasi menghasilkan nilai standar deviasi maksimum (SD) sebesar 3,2 dB, sedangkan nilai SD tidak lebih tinggi dari 3 dB setelah proses renovasi. Hal ini juga menunjukkan bahwa tingkat tekanan suara (sound pressure level, SPL) yang diterima oleh setiap titik ukur dalam ruangan setelah renovasi pada setiap frekuensi nilainya lebih rendah dibandingkan dengan nilai SPL untuk setiap titik ukur di dalam ruangan sebelum renovasi. Pengukuran background noise di ruangan pada kondisi sebelum renovasi menghasilkan nilai noise criterion (NC) 40–45 dalam kondisi air conditioner (AC) atau pendingin ruangan hidup dan pada kondisi ruangan setelah renovasi ternyata nilai NC menjadi lebih baik, yaitu turun pada angka 30–35. Hasil pengukuran tiga parameter karakteristik akustik di dalam ruangan setelah renovasi menunjukan bahwa ruangan tersebut memiliki kondisi akustik yang jauh lebih baik dibandingkan kondisi akustik ruangan tersebut sebelum renovasi serta memenuhi standar untuk digunakan dalam penyelenggaraan seminar dan acara seremonial pembukaan dan penutupan diklat.
WEB BASED RAIN GAUGE CALIBRATOR Sensus Wijonarko; Tatik Maftukhah; Dadang Rustandi; Bernadus Sirenden; Nur Tjahyo Darmayanti
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.v43i1.176

Abstract

Rain gauges in Indonesia need recalibration at least twice a year, viz. at the end of dry season where the rain gauges will soon work harder and at the end of rainy season where usually there are many garbage on each rain gauge orifice. Based on the direct surveys in the fields and discussions at some rain gauge calibration laboratories in Indonesian western, central, and eastern parts, the calibration officers in the visited offices generally used manual rain gauge calibrators to recalibrate rain gauges on their fields. Therefore, the dependency of calibration results to the human beings is very high. Meanwhile to avoid data gathering discontinuation, rain gauges should be recalibrated in situ. To cope with this problem and other issues related to rain gauge calibrators, a research to develop a web based rain gauge calibrator was carried out. The research result using research and development method showed that this calibrator can work well as an in situ and ex situ rain gauge calibrator.
Pembuatan Alat Ukur Gaya dengan Transducer Gaya Strain Gauge dan Kantilever dari Bahan High Strength Low Alloy (Hsla) Asab 70 Mardiyanto Mardiyanto; Encung Sumarna
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.v37i2.40

Abstract

Desain dan fabrikasi alat ukur gaya berbasis komputer pribadi telah dikerjakan dengan kemampuan pengukuran maksimum 100 kgf. Alat ukur dapat dihubungkan langsung ke suatu sistem produksi dan hasil pengukuran dapat terlihat secara otomatis. Pada sistem alat ukur ini load cell digunakan sebagai sensor pengukuran. Pengguna dapat berinteraksi dengan sistem pengukuran melalui suatu sistem antarmuka. Perangkat lunak untuk pengambilan data juga telah dibuat. Sistem pengukuran ini telah diuji dan dikalibrasi untuk mendapatkan beberapa hasil dari pengukuran beban dan sistem ini dapat bekerja dengan baik pada rentang pengukuran antara 0 sampai 100 kgf dengan kesalahan titik nol sebesar 0% dan kesalahan pengulangan pengukuran kurang dari 1%. Pemakaian alat ini relatif mudah sehingga dapat dengan mudah untuk diintegrasikan pada industri terotomasi. Oleh karena itu, alat ukur ini mempunyai potensi yang besar untuk digunakan dalam berbagai industri di mana pengukuran besaran gaya merupakan bagian dari proses produksi. Kata kunci: load cell, komputer pribadi, perangkat keras data akuisisi.

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