YS/T 684-2008 English PDF

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YS/T 684-2008: Calibration specification for local mounting digital indicators
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 684-2008	369	Add to Cart	3 days	Calibration specification for local mounting digital indicators	Valid

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Basic data

Standard ID: YS/T 684-2008 (YS/T684-2008)
Description (Translated English): Calibration specification for local mounting digital indicators
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: N14
Classification of International Standard: 17.200.10
Word Count Estimation: 14,184
Date of Issue: 2008-03-12
Date of Implementation: 2008-09-01
Quoted Standard: JJF 1059-1999
Regulation (derived from): NDRC Notice No. 25 of 2008
Issuing agency(ies): National Development and Reform Commission
Summary: This standard applies to the use and repair of the input signal for the thermocouple, RTD, 0 mA ~ 20 mA DC, 0 V ~ 5V DC, with analog digital converter thermal digital display instrument calibration.

YS/T 684-2008: Calibration specification for local mounting digital indicators

---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 local mounting digital indicators Book People's Republic of China Nonferrous Metals Industry Standard Thermal digital display field calibration specification Posted 2008-03-12 2008-09-01 implementation National Development and Reform Commission issued

Foreword

This standard by the National Standardization Technical Committee of non-ferrous metals and centralized. The Standard Appendix A, Appendix B and Appendix C are informative appendices. This standard by the Jinchuan Group Ltd. is responsible for drafting. This standard by the Aluminum Corporation of China Henan Branch, Liuzhou China Tin Group Co., Ltd., Chinalco Luoyang Copper Co. Division, Southwest Aluminum (Group) Co., Ltd., Yunnan Copper Co., Ltd. and Zhuzhou Smelter Group Co., Ltd. participated in the drafting. The main drafters of this standard. Lu Yi, Li Qiujuan, Yinzhi Tao, Li Junbo, Chow, Liang Jirong, Bao Yang Jun, Li Yuanming, Li Kanglie, Xiaoyun Gui. This standard by the National Standardization Technical Committee is responsible for interpretation of non-ferrous metals. Thermal digital display field calibration specification

1 Scope

This standard applies to the use and repair after the input signal is thermocouple, RTD, 0mA ~ 20mADC, 0V ~ 5VDC, with Analog - digital converter thermal digital display calibration. 2. References The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. JJF1059-1999 Evaluation and Expression of Uncertainty in Measurement

3 Terms and Definitions

3.1 In measured on the same point, the absolute value of the difference between the actual value is lower stroke return error at this point. 3.2 Output variable output according to the requirements, the difference between the measured input signal corresponding to the instrument represents the value of the set value.

4 Overview

Digital display is a standard unit of measurement for the power signal to a digital display unit instrument, mainly used for display of process parameters, More widely used in the field. Standard power signal main standard sub-degree temperature sensors, 4mA ~ 20mA and 1V ~ 5V DC signals, it does not exclude He standardized the input signal power. Digital display has a power supply 220VAC, 24VDC, the principle shown in Figure 1.

1 digital display works

5 Metrological characteristics

5.1 Indication error Digital display shows the value of the maximum error should not exceed the maximum permissible error. ......

Image     

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