JJF 1758-2019 English PDF

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JJF 1758-2019: Calibration Specification for Low Frequency Phase Shifters and Phase Generators
Status: Valid

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Basic data

Standard ID: JJF 1758-2019 (JJF1758-2019)
Description (Translated English): Calibration Specification for Low Frequency Phase Shifters and Phase Generators
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A56
Classification of International Standard: 17.220
Word Count Estimation: 18,131
Date of Issue: 2019
Date of Implementation: 2020-03-27
Issuing agency(ies): State Administration for Market Regulation

JJF 1758-2019: Calibration Specification for Low Frequency Phase Shifters and Phase Generators

---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.
Calibration Specification for Low Frequency Phase Shifters and Phase Generators National Measurement Technical Specification of the People's Republic of China Calibration specification for low frequency phase shifter and phase generator PhaseGenerators 2019-09-27 release 2020-03-27 Implementation Issued by the State Administration of Market Supervision and Administration Low frequency phase shifter and phase generator Calibration specifications Replace JJG530-1988 Focal point. National Radio Measurement Technical Committee Drafting unit. 203 Institute of the Second Academy of China Aerospace Science and Industry Corporation The 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 Drafters of this specification. Xue Xue (203 Institute of the Second Academy of China Aerospace Science and Industry Corporation) Yang Qiaoxin (Fifth Institute of Electronics, Ministry of Industry and Information Technology) Liang Weijun (Chinese Academy of Metrology) Yang Yi (203 Institute of the Second Academy of China Aerospace Science and Industry Corporation) Yunmei Chen (203 Institute of the Second Academy of China Aerospace Science and Industry Corporation)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 Overview (1) 3 Measurement characteristics (1) 3.1 Output frequency (1) 3.2 Output sine wave amplitude (1) 3.3 Total harmonic distortion of output sine wave (1) 3.4 Output phase shift (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 Appearance and functional inspection (3) 5.3 Output frequency (3) 5.4 Output sine wave amplitude (3) 5.5 Output sine wave total harmonic distortion (3) 5.6 Output phase shift (4) 6 Expression of calibration results (6) 7 Recalibration time interval (6) Appendix A Original Record Format (7) Appendix B. Internal page format of the calibration certificate (9) Appendix C Examples of Uncertainty Evaluation of Calibration Results of Main Items (11)

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 JJG530-88 "Regulations for Verification of Low Frequency Phase Shifters (Trial)" as follows. --- The name of the original regulation was "Verification Regulation of Low Frequency Phase Shifter (Trial)", which is now revised to "Low Frequency Phase Shifter and Phase Calibration Specification of Bit Generator "; --- Added the calibration of the phase generator, the calibration items include output frequency, output sine wave amplitude, output positive Sine wave total harmonic distortion and output phase shift; --- The frequency range is extended from 50Hz ~ 50kHz to 1Hz ~ 100kHz. Previous releases of this specification. --- JJG530-1988. Calibration specification for low frequency phase shifter and phase generator

1 Scope

This specification applies to the calibration of low-frequency phase shifters and phase generators with frequencies in the range of 1 Hz to 100 kHz.

2 Overview

The low-frequency phase shifter makes the output signal have a certain phase difference with respect to the input signal through the phase-shift network. As a dual-channel signal generator, the phase generator can simultaneously output two channels of the same frequency with precisely adjustable phase difference Signal, and the output amplitude of each channel can be adjusted independently. Low-frequency phase shifters and phase generators are mainly used in automatic control systems, radio navigation ranging and positioning systems, and It can be used as a phase standard to calibrate phase measurement equipment such as frequency response analyzers and low-frequency phase meters.

3 Measurement characteristics

3.1 Output frequency Frequency range. 1Hz ~ 100kHz; Maximum allowable error. ± 1 × 10-4. 3.2 Output sine wave amplitude Amplitude range. 50mV ~ 10V; Maximum allowable error. ± (0.5% ~ 2%) (10Hz ~ 100kHz). 3.3 Total harmonic distortion of output sine wave Range. 0.01% ~ 0.3%. 3.4 Output phase shift Frequency range. 1Hz ~ 100kHz; Phase shift range. 0 ° ~ 360 °; Maximum allowable error. ± (0.02 ° ~ 0.2 °) (low-frequency phase shifter); ± (0.01 ° ~ 0.5 °) (phase generator). Note. The above technical indicators are not used to determine eligibility, only for reference.

4 Calibration conditions

4.1 Environmental conditions a) Ambient temperature. 23 ℃ ± 5 ℃; b) Relative humidity. ≤80%; c) Power requirements. voltage (220V ± 11V), frequency (50Hz ± 1Hz); d) Others. There are no mechanical vibrations and electromagnetic interference that affect the normal operation of the instrument. 4.2 Measurement standards and other equipment 4.2.1 General counter ......

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