The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform

Ivan Lenicek - One of the best experts on this subject based on the ideXlab platform.

  • Determination of High-Resolution Digital Voltmeter Input Parameters
    IEEE Transactions on Instrumentation and Measurement, 2008
    Co-Authors: Ivan Lenicek, Damir Ilic, Roman Malaric
    Abstract:

    High-resolution Digital Voltmeters (DVMs) can be widely used when precise measurements are needed, but input circuitry can contribute to the results of measurement. Therefore, to make uncertainty of measurement as small as possible for a particular measurement, it is necessary to characterize its input parameters. In this paper, the methods for the determination of input resistance, input capacitance, and input offset current of widely used precise DVMs HP 3458A with 8 1/2-digit resolution are presented. The method with voltage source and high-ohmic divider resistor has been developed for the determination of both input offset current IS and input resistance RV. The second method with the source of the linear voltage ramp and the picoampermeter is primarily used for the determination of input capacitance CV. It was shown that the input offset current of Voltmeters is in the range of picoamperes with relative instability of approximately plusmn0.1, the input resistance is in the range of teraohms with the same relative instability of plusmn0.1, and the input capacitance was measured to be in the range of a few hundred picofarads with uncertainty of a few picofarads.

  • Determination of Digital Voltmeter input parameters
    2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007, 2007
    Co-Authors: Ivan Lenicek, Damir Ilić, Roman Malarić
    Abstract:

    The Digital Voltmeter input circuitry can contribute to measurement uncertainty, and is therefore important to characterize it. In this paper the methods for the determination of input resistance, capacitance and input bias current of the precise Digital Voltmeters HP 3458A are presented. The method with voltage source and high-ohmic divider resistor has been developed for the determination both the input offset currents IS, as well as the input resistance RV. The second method with source of linear voltage ramp and picoampermeter is primary used for the determination of input capacitance CV. It was shown that: internal current of Voltmeters is in the range ofpicoamperes, with relative instability of approximately plusmn0,1; input resistance is in the range of TOmega with the relative instability of plusmn0.15; and the input capacitance was measured with an uncertainty of a few picofarads.

  • voltage ratio measurements using two Digital Voltmeters and resistive voltage divider
    IEEE Transactions on Instrumentation and Measurement, 2006
    Co-Authors: Roman Malaric, Ivan Lenicek, Kresimir Malaric
    Abstract:

    This paper presents a method to accurately measure voltage ratios from 1:2 to 1:10 with a calibrated Digital Voltmeter (DVM) at voltage ranges of 1-10 V using a simple resistive-voltage divider. The divider can be used as an absolute divider or as a Hamon divider. The achieved accuracy is better than 10/sup -7/, comparable to those reported with measurements with Josephson array voltage source (JAVS).

  • high precision voltage ratio measurements using Digital Voltmeters and resistive voltage divider
    Instrumentation and Measurement Technology Conference, 2004
    Co-Authors: Roman Malaric, Ivan Lenicek, Kresimir Malaric
    Abstract:

    This paper presents a method to accurately measure voltage ratios from 1:2 to 1:10 with a calibrated Digital Voltmeter at voltage ranges of 1V and 10V using a simple resistive voltage divider. The divider can be used as an absolute divider or as a Hamon divider. The achieved accuracy is better than 10/sup -7/, comparable to those reported with measurements with Josephson array voltage source.

Roman Malaric - One of the best experts on this subject based on the ideXlab platform.

  • Determination of High-Resolution Digital Voltmeter Input Parameters
    IEEE Transactions on Instrumentation and Measurement, 2008
    Co-Authors: Ivan Lenicek, Damir Ilic, Roman Malaric
    Abstract:

    High-resolution Digital Voltmeters (DVMs) can be widely used when precise measurements are needed, but input circuitry can contribute to the results of measurement. Therefore, to make uncertainty of measurement as small as possible for a particular measurement, it is necessary to characterize its input parameters. In this paper, the methods for the determination of input resistance, input capacitance, and input offset current of widely used precise DVMs HP 3458A with 8 1/2-digit resolution are presented. The method with voltage source and high-ohmic divider resistor has been developed for the determination of both input offset current IS and input resistance RV. The second method with the source of the linear voltage ramp and the picoampermeter is primarily used for the determination of input capacitance CV. It was shown that the input offset current of Voltmeters is in the range of picoamperes with relative instability of approximately plusmn0.1, the input resistance is in the range of teraohms with the same relative instability of plusmn0.1, and the input capacitance was measured to be in the range of a few hundred picofarads with uncertainty of a few picofarads.

  • voltage ratio measurements using two Digital Voltmeters and resistive voltage divider
    IEEE Transactions on Instrumentation and Measurement, 2006
    Co-Authors: Roman Malaric, Ivan Lenicek, Kresimir Malaric
    Abstract:

    This paper presents a method to accurately measure voltage ratios from 1:2 to 1:10 with a calibrated Digital Voltmeter (DVM) at voltage ranges of 1-10 V using a simple resistive-voltage divider. The divider can be used as an absolute divider or as a Hamon divider. The achieved accuracy is better than 10/sup -7/, comparable to those reported with measurements with Josephson array voltage source (JAVS).

  • high precision voltage ratio measurements using Digital Voltmeters and resistive voltage divider
    Instrumentation and Measurement Technology Conference, 2004
    Co-Authors: Roman Malaric, Ivan Lenicek, Kresimir Malaric
    Abstract:

    This paper presents a method to accurately measure voltage ratios from 1:2 to 1:10 with a calibrated Digital Voltmeter at voltage ranges of 1V and 10V using a simple resistive voltage divider. The divider can be used as an absolute divider or as a Hamon divider. The achieved accuracy is better than 10/sup -7/, comparable to those reported with measurements with Josephson array voltage source.

Sujatmiko Endri - One of the best experts on this subject based on the ideXlab platform.

  • Digital Voltmeter Trainer As A Learning MediaOf Digital Technique Sequential On The Competency SkillsOf Audio Video Technique In SMK Negeri 2 Yogyakarta
    2013
    Co-Authors: Sujatmiko Endri
    Abstract:

    The purpose of this study is to know about the design, performance, and the eligibility level of the Digital Voltmeter Trainer as a learning media of Digital technique sequential on the competency skills of Audio Video technique in SMK Negeri 2 Yogyakarta. Research and Development method is the method that be used in this research. The object of this study is the Digital Voltmeter trainer. The cycles of the research are : 1) analysis, 2) design, 3) implementation, 4) test, 5) validation, 6) and the using test. In order to collect the data, the research used some methods, they are: 1) test and performance observation, 2) questionnaire, in order to know the eligibility level of the media, based on the content validity and construct validation and also the using test by students of SMK N 2 Yogyakarta. Describtive analysis is used as the technique to analyse the data. The results of the research showed that Digital Voltmeter trainer as a learning media of Digital technique sequential including some cycles: 1) pulse generator, 2) control the input pulse, 3) decimal and hexa counter, 4) decoder BCD, 5) display, 6) overflow, 7) DAC, 8) comparator, 9) selector, and 10) power supply. Test results of the test and performance observations of each circuit board trainer showed that it can work properly and when used as a gauge Voltmeter to measure voltage up to 220V AC or DC. The eligibility level media trainer can be seen from the validation test of contents the result up to 88.41%, the validation test of construct up to 80.11% and the using test by the student up to 82.14%, then the Digital Voltmeter trainer be used as a learning media in SMK N 2 Yogyakarta. Keywords: learning media, trainer, Digital Voltmeter

Kresimir Malaric - One of the best experts on this subject based on the ideXlab platform.

Endri Sujatmiko - One of the best experts on this subject based on the ideXlab platform.

  • Digital Voltmeter Trainer As A Learning Media Of Digital Technique Sequential On The Competency Skills Of Audio Video Technique In SMK Negeri 2 Yogyakarta
    2013
    Co-Authors: Endri Sujatmiko
    Abstract:

    The purpose of this study is to know about the design, performance, and the eligibility level of the Digital Voltmeter Trainer as a learning media of Digital technique sequential on the competency skills of Audio Video technique in SMK Negeri 2 Yogyakarta. Research and Development method is the method that be used in this research. The object of this study is the Digital Voltmeter trainer. The cycles of the research are : 1) analysis, 2) design, 3) implementation, 4) test, 5) validation, 6) and the using test. In order to collect the data, the research used some methods, they are: 1) test and performance observation, 2) questionnaire, in order to know the eligibility level of the media, based on the content validity and construct validation and also the using test by students of SMK N 2 Yogyakarta. Describtive analysis is used as the technique to analyse the data. The results of the research showed that Digital Voltmeter trainer as a learning media of Digital technique sequential including some cycles: 1) pulse generator, 2) control the input pulse, 3) decimal and hexa counter, 4) decoder BCD, 5) display, 6) overflow, 7) DAC, 8) comparator, 9) selector, and 10) power supply. Test results of the test and performance observations of each circuit board trainer showed that it can work properly and when used as a gauge Voltmeter to measure voltage up to 220V AC or DC. The eligibility level media trainer can be seen from the validation test of contents the result up to 88.41%, the validation test of construct up to 80.11% and the using test by the student up to 82.14%, then the Digital Voltmeter trainer be used as a learning media in SMK N 2 Yogyakarta. Keywords: learning media, trainer, Digital voltmete