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JJF 1756-2019 English PDF

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JJF 1756-2019: Calibration Specification for Low-frequency Phase Meters
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Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1756-2019	English	419	Add to Cart	4 days [Need to translate]	Calibration Specification for Low-frequency Phase Meters	Valid	JJF 1756-2019

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Basic data

Standard ID	JJF 1756-2019 (JJF1756-2019)
Description (Translated English)	Calibration Specification for Low-frequency Phase Meters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A56
Classification of International Standard	17.220
Word Count Estimation	19,182
Date of Issue	2019
Date of Implementation	2020-03-27
Issuing agency(ies)	State Administration for Market Regulation

JJF 1756-2019: Calibration Specification for Low-frequency Phase Meters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Low frequency phase meter calibration specifications) National Measurement Technical Specification of the People's Republic of China Low frequency phase meter calibration specifications 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Low frequency phase meter calibration specifications PhaseMeters Replace JJG381-1986 Focal point. National Radio Measurement Technical Committee Drafting unit. Fifth Institute of Electronics, Ministry of Industry and Information Technology Chinese Academy of Metrology This specification is entrusted to the National Radio Measurement Technical Committee for interpretation The main drafters of this specification. Shen Xiangping (The Fifth Institute of Electronics, Ministry of Industry and Information Technology) Liang Weijun (Chinese Academy of Metrology) Yang Qiaoxin (Fifth Institute of Electronics, Ministry of Industry and Information Technology) Participating drafters. Hai Xingfang (Chinese Academy of Metrology) Hongxi Wang (The Fifth Institute of Electronics, Ministry of Industry and Information Technology)

Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 Measurement characteristics (1) 3.1 Phase measurement (1) 3.2 Amplitude and phase error (1) 4 Calibration conditions (1) 4.1 Environmental conditions (1) 4.2 Measurement standards and other equipment (1) 5 Calibration items and calibration methods (2) 5.1 Calibration items (2) 5.2 Calibration method (2) 6 Expression of calibration results (4) 7 Recalibration time interval (5) Appendix A Original Record Format (6) Appendix B. Internal page format of the calibration certificate (9) Appendix C Examples of Uncertainty Evaluation of Calibration Results of Main Items (10)

Introduction

This specification is based on JJF 1071-2010 "Rules for Compiling National Measurement and Calibration Specifications" and JJF 1059.1-2012 Compilation of "Measurement Uncertainty Evaluation and Representation". This specification is a revision of JJG381-1986 "BX-21 Low Frequency Digital Phase Meter Verification Regulations". Compared with JJG381-1986, the main changes are. ---JJG381-1986 is only applicable to BX-21 low frequency digital phase meter, this specification is for 5Hz~1MHz The low frequency phase meter is universal; ---The maximum allowable phase error is ± (0.1°~0.3°), (10Hz~100kHz, 100mV~100V) Change to ± (0.02°~0.1°), (5Hz~100kHz, 100mV~100V); --- Increased the evaluation example of uncertainty. The previous releases of this specification are. ---JJG381-1986. Low frequency phase meter calibration specifications

1 Scope

This specification applies to the calibration of low frequency phase meters from 5Hz to 1MHz.

2 Overview

The low-frequency phase meter widely used at present is a direct-reading digital phase meter, which is composed of a shaper, a phase discriminator and an indicator to make. Its working principle is based on the time interval measurement method, through the phase-time converter, the two signals with phase difference No. (referred to as the reference signal and the measured signal) are converted into start and stop pulses at a certain time interval, or Bit-frequency converter, convert the phase difference of two signals into frequency, and then use an electronic counter to measure its time interval or frequency Rate, the corresponding phase is obtained from the time interval or frequency. The low frequency phase meter is mainly used to measure the phase difference of two sinusoidal signals of the same frequency.

3 Measurement characteristics

3.1 Phase measurement Phase range. 0°~360°; Maximum allowable phase error. ±(0.02°~0.1°), (5Hz~100kHz, 100mV~100V); ±(0.1°~3°), (100kHz~1MHz, 100mV~5V). 3.2 Amplitude and phase error Maximum allowable phase error. ±(0.02°~0.1°), (5Hz~100kHz, 100mV~100V); ±(0.1°~3°), (100kHz~1MHz, 100mV~5V).

4 Calibration conditions

4.1 Environmental conditions a) Ambient temperature. 23℃±5℃; b) Relative humidity. ≤80%; c) Power requirements. (220±11)V, (50±1)Hz; d) Others. There are no mechanical vibrations and electromagnetic interference that affect the normal operation of the calibration. 4.2 Measurement standards and other equipment 4.2.1 Standard phase generator Phase range. 0°~360°; The maximum allowable phase error. ±(0.007°~0.03°), (5Hz~100kHz, 100mV~100V); Maximum amplitude error. ±2% (5Hz~100kHz, 100mV~100V). 4.2.2 Function signal generator Frequency range. 5Hz~1MHz;

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