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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 7 Documents
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Search results for , issue "Vol 37, No 1 (2013)" : 7 Documents clear
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
PENGEMBANGAN DAN PENGUJIAN TERMOMETER TAHANAN PLATINA 2,5 OHM Larassati, Dwi
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.v37i1.6

Abstract

The Temperature Metrology Laboratory of Puslit KIM-LIPI has been able to develop a platinum resistance thermometer Pt 2.5. This thermometer can be used in a temperature range (0 ~ 100)°C. It is calibrated using Pt-25 standard platinum resistance thermometer. The calibration result shows that the thermometer has uncertainty 0.22°C with a confidence level 95% and coverage factor k = 2. It meets resistance thermometer accuracy for class B, in a temperature range of use (0~70)°C based on standard DIN EN 60751:2009. Keywords: platinum resistance thermometer, performance test
REALISASI ITS-90 UNTUK RENTANG 232 C – 962 OC PADA KE LP4 Wiriadinata, Hidayat
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.v37i1.11

Abstract

The realization of ITS-90 has been done using the monochromatic radiation thermometer KE LP4 80-59 over a temperature range 232C - 962 C and wavelength 1.57 µm. The method used is the method of Sakuma-Hattori using fixed-point black body calibrator tin, aluminum and silver. The value of uncertainty of the KE LP4 80-59 at the temperature range for 95% confidence level and a coverage factor of k = 2, is expressed by the equation: U(t) = 1,067461375 – 0,008000541.t + 2,586471.10-5.t2 -3,33928.10-8.t3 + 1,497270.10-12.t4 Keywords : the realization of ITS-90, the method of Sakuma-Hattori, the monochromatic radiation thermometer.
EFEK WAKTU MILLING TERHADAP SIFAT MAGNET KOMPOSIT Ni-C -, Yunasfi
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.v37i1.7

Abstract

EFFECTS OF MILLING TIME ON MAGNETIC PROPERTIES OF Ni-C COMPOSITES. A study on the effect of milling time to magnetic properties of Ni-C composites has been carried out. The composite materials of Ni-C was prepared by mixing nickel and carbon (C) powders with the weight ratio of Ni and C is 2% : 98%, and by varying the milling time for 25, 50 and 75 hours using High Energy Milling (HEM) technique. Results of identification by X-ray diffractometer (XRD) showed that X-ray diffraction peak intensity decreased and particle size was going smaller with the increasing of milling time. Whereas the optimal milling time for Ni-C composite system is 50 hours. This is indicated by the largest surface area (about 483 m2/g) and highest magnetic properties of Ni-C compared with other milling time. The results of magnetic parameter value for milling time of 50 hours shows the highest values of Ms (Saturated Magnetization), Mr (Remanence Magnetization) and Hc (Coercive Field) i.e. 2.29 emu/g, 0.43 emu/g and 0.017 Tesla, respectively. The highest value of magnetoresistance ratio (MR) i.e. 14.22% at 7.5 kOe magnetic field was also reached. Keywords : Ni-C Composites, Milling Technique, Magnetic Parameters, Magnetoresistance Ratio.
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.
PENGARUH TATA LETAK INSTRUMEN GAMELAN JAWA DI PANGGUNG PENDHAPA ISI SURAKARTA TERHADAP PARAMETER AKUSTIK BAGI PENGENDANG -, Suyatno
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.v37i1.9

Abstract

This paper is discussed an analysis of the acoustics parameters of Javanese Gamelan instruments layout at position of performer namely Pengendang (drummer). This is of importance as in the Gamelan concert, Pengendang is a performer who frequently acts as 'a conductor' (leader) of the performance. As a leader, Pengendang has a duty to maintain the rhythm and tempo of the performance based on the perceived tones as result of Pengendang’s left and right ear response (IACC). Pengendang realizes such a duty by giving a direction through tones produced by the “kendang”. The tones produced by the gamelan lead to particular characteristics of the sound field. Theoretically, the sound field produced by each instrument of the gamelan that is affected by the space properties where the performance is being conducted. In this research, Pendhapa ISI Surakarta was considered as the stage in which the Javanese Gamelan was performed. The Pendhapa 'ISI Surakarta' is a semi-outdoor concert hall. Therefore, this produces a direct sound to the receiver particularly for the performers. It is found that the acoustics parameters measured at Pengendang position for gending "Gambyong Pareanom" is 98 dB for Listening Level (LL) while Tau-e and tau-1 are 24.9 ms and 2 ms respectively. IACC of 0.81 is also pronounced. These values indicate that the Javanese gamelan performed in Pendhapa ISI Surakarta has particular acoustic characteristic. However, this acoustic charactertics has not yet been “optimum acoustics preference” as expected by a drummer. Therefore, it is instructive to investigate this further based on fisio- and physio- acoustic aspecs in order to ensure communication among the performers through the tones can be maintained. Keywords: Javanese Gamelan, instruments layout, Pendahpa, Pengendang, Listening Level, Tau-e, Tau-1, IACC.
EVALUASI PENGUKURAN SUSEPTIBILITAS MAGNETIK PADA ANAK TIMBANGAN Darmayanti, Nur Tjahyo Eka
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.v37i1.5

Abstract

The research on the magnetic susceptibility measurement in weight using a Sartorius susceptometer has been done. The magnetic properties of weight should be determined before calibration to ensure that any magnetic interaction is negligible. This is important because magnetic forces can increase due to the interaction of two standard masses or the use of mass comparator instruments while weighing the weight or the interactions between magnetic forces with the environment. A susceptometer equipment for measuring magnetic susceptibility has been developed in KIM LIPI and has been successfully applied to measure mass standard with a nominal weight of 1 kg. From this research, it is known that the value of the magnetic susceptibility of sample weights is still in the tolerance limit permitted by Organisation Internationale de Métrologie Légale (OIML), so that the magnetic interactions in standard mass measurements are negligible.

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