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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 5 Documents
 1 
Search results for , issue "Vol 44, No 2 (2020)" : 5 Documents clear
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.
Perbandingan Pengukuran Salinitas Air antara Metode Daya Hantar Listrik dan Massa Jenis untuk Aplikasinya pada Bidang Pertanian. Jalu Ahmada Prakosa; Bernadus H. Sirenden; Dadang Rustandi; Budi Kartiwa; Sensus Wijornako; Tatik Maftukhah; Purwowibowo Purwowibowo
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.v44i2.221

Abstract

Pengukuran tingkat keasinan (salinitas) air banyak digunakan untuk aplikasi pertanian khususnya di daerah pesisir. Akurasi pengukuran salinitas air sangat penting selain pertimbangan biaya dan kemudahannya karena setiap tanaman pangan memiliki toleransi salinitas yang berbeda. Bahkan pengukuran salinitas sangat berguna dalm bidang pertanian dalam penelitian toleransi tanaman pangan tersebut terkait pemanfaatan potensi lahan salin. Metode pengukuran berbasis daya hantar listrik dan massa jenis akan diinvestigasi perbandingan nilai kesalahan dan ketidakpastian pengukurannya karena alat ukur yang menggunakan keduanya masih banyak digunakan di pasaran. Sampel alat ukur yang menerapkan metode daya hantar dan massa jenis di pasaran dapat digunakan dalam penelitian ini. Natrium klorida digunakan sebagai nilai referensi dengan teknik gravimetrik sesuai definisi salinitas air. Tujuan penelitian ini adalah membandingkan pengukuran salinitas air antara daya hantar listrik dan massa jenis secara kuantitatif dengan sampel alat ukur yang beredar di pasaran untuk aplikasi pada bidang pertanian. Dari hasil eksperimen, didapatkan metode daya hantar listrik memiliki kesalahan lebih baik 3 kalinya, namun untuk salinitas rendah di bawah 15 PPT cenderung terjadi kesalahan acak dan ketidaklinearan. Akurasi sekitar 5% bahkan 3% untuk hidrometer salinitas dapat dicapai dengan kalibrasi dan penyetelan alat untuk memenuhi kebutuhan pengukuran salinitas pada bidang pertanian.
MEASUREMENT UNCERTAINTY OF THE OPTICAL WAVELENGTH CALIBRATION 633 nm BY BEAT FREQUENCY MEASUREMENT METHODS Asep Hapiddin; Yulita Ika Pawestri; A. M. Boynawan; Ratnaningsih Ratnaningsih
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.v44i2.220

Abstract

Measurement traceability is one of the critical aspects in metrology area. The measurement uncertainty had been evaluated to assure reliability of the optical wavelength calibration system for stabilized He-Ne laser 633 nm in SNSU-BSN. Beat frequency measurement was applied as a calibration method by utilizing KIM-1 as a reference standard that traceable to SI unit through CCL-K11 key comparison. Best measurement capability declares with a relative uncertainty of ±1.3×10-10 by excluding UUC effect. The calibration replica was performed as a validation process, dual mode laser head Agilent 5519B took a role as UUC. As calibration result, beat frequency of KIM-1 and UUC is (122.931±0.060) MHz. Among all of the uncertainty sources, KIM-1 uncertainty most significant influence to the beat frequency uncertainty and the optical wavelength of the UUC laser in vacuum condition. Based on the evaluation result, the calibration system of stabilized He-Ne laser can be validated and trace back with documented unbroken calibration chain to the primary standard of length, KIM-1 where established in SNSU-BSN.
A Proposed Method to Find Exciter’s Maximum Acceleration Magnitude on Vibration Meter Calibration System Ninuk Ragil Prasasti; Denny Hermawanto
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.v44i2.206

Abstract

National Measurement Standards-National Standardization Agency of Indonesia (SNSU-BSN) has implemented calibration method for vibration meters according to ISO 16063-21:2003. In this calibration system, an electrical signal at a particular frequency and magnitude is generated by the signal generator. Then it is amplified before converted into a mechanical vibration by the exciter. A vibration acceleration produced by the exciter is measured by the reference accelerometer as well as the vibration meter under test simultaneously. However, the maximum acceleration generated in the calibration system is affected and limited by several factors such as a total mass load of accelerometer, data acquisition system, displacement and velocity limits of an exciter. This paper presents the analysis of maximum acceleration produced by the exciter in the vibration meter calibration system considering the effect of those factors within a frequency range from 10 Hz to 5 kHz.
A PROTOTYPE AND ITS TESTING METHOD DEVELOPMENT FOR FIVE TRAPS METAL CATCHERS TO REMOVE METAL IMPURITIES IN FOOD PRODUCTS Novrita Idayanti; N. Sudrajat; K. Kristiantoro; D. Mulyadi; I. Kurniawan; M. Nurdin; J. Nugraha
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.v44i2.207

Abstract

Development a prototype and its testing method of five traps metal catchersfor removing metal impurities in food products have been done.Thisinstrument can capture metal pieces during the production process. The purpose of this study is to provide information for the industry about magnetic strength testing methods, simulating magnetic fields at the same pole, and testing of metal catcher performance. In addition, the making of this prototype can meet the needs of the food industry because until now, these instruments have been imported from abroad. Unfortunately, the shape and magnetic strength of the instruments from abroad cannot match the needs of the industry and cannot be re-chargeable.The design of a prototype consists of permanent rare earth magnet neodymium iron boron (NdFeB) with a surface magnetic strength that is commonly available on the market of 5,000-6,000 gauss. The magnets were arranged into stainless steel rods with the same magnetic pole to produce large magnetic fluxes. Simulation of magnetic strength by entering the dimension value and magnetic strength,the results show that the magnetic strength of magnet NdFeB is 20,000 gauss that was obtained by using Femm 4.1 software.The testing of magnetic strengthby using Gauss meters up to 6,000-10,000 gauss. The efficiency the prototype has also been tested in the food industry, especially for dairy products by passing 2 kg of milk powder that containing metal fragments (iron scraps, paper clips, staples, and splinter wires) with sizes 0.3-25 mm. From the experimental results, the magnetic catch was quite good with efficiency above 92.5%.  The testing method and this prototypeare eligible to be applied to the dairy industry and food products.

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