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JJG 1158.1-2018 English PDF

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JJG 1158.1-2018: Rail Thermometers--Part 1: Bimetallic Rail Thermometers
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JJG 1158.1-2018English229 Add to Cart 3 days [Need to translate] Rail Thermometers--Part 1: Bimetallic Rail Thermometers Valid JJG 1158.1-2018

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Basic data

Standard ID JJG 1158.1-2018 (JJG1158.1-2018)
Description (Translated English) Rail Thermometers--Part 1: Bimetallic Rail Thermometers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A54
Word Count Estimation 10,178
Date of Issue 2018-12-25
Date of Implementation 2019-03-25
Regulation (derived from) State Administration of Markets, Announcement No. 34 of 2018
Issuing agency(ies) State Administration for Market Regulation

JJG 1158.1-2018: Rail Thermometers--Part 1: Bimetallic Rail Thermometers

---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.
(Steel rail thermometers - Verification procedures - Part 1. Two-metal rail thermometers) National Metrology Verification Regulations of the People's Republic Rail thermometer Part 1. Bimetal rail thermometer Part 1. BimetalicRailThermometers Published on.2018-12-25 2019-03-25 implementation State Market Supervisory Administration released Rail thermometer test procedure Part 1. Bimetal rail thermometer Part 1. BimetalicRailThermometers Focal Point. National Railway Special Measuring Instrument Measurement Technical Committee Main drafting unit. Center for Metrology, China Railway Guangzhou Bureau Group Co., Ltd. China Railway Science Research Institute Group Co., Ltd. Standard Measurement Research Research institute China Railway Harbin Bureau Group Co., Ltd. Quality and Technical Supervision Office Participated in the drafting unit. Technical Supervision Office of China Railway Shanghai Bureau Group Co., Ltd. China Railway Nanchang Bureau Group Co., Ltd. Technical Supervision Office China Railway Chengdu Bureau Group Co., Ltd. Metrology Institute This regulation entrusts the national railway special measuring instrument measurement technical committee to explain The main drafters of this procedure. Hong Song (China Metro Guangzhou Bureau Group Co., Ltd. Center Metrology Institute) Li Junxia (Standard Metrology Institute, China Railway Science Research Group Co., Ltd.) Tan Ying (Quality and Technical Supervision Institute of China Railway Harbin Bureau Group Co., Ltd.) Participate in the drafters. Wu Wenting (Technical Supervision Office of China Railway Shanghai Bureau Group Co., Ltd.) Huo Yanhong (Technical Supervision Office of China Railway Nanchang Bureau Group Co., Ltd.) Zhao Rui (China Railway Chengdu Bureau Group Co., Ltd. Metrology Institute)

table of Contents

Introduction (II) 1 Scope (1) 2 Overview (1) 3 Metrological performance requirements (1) 3.1 indication error (1) 3.2 Return error (1) 3.3 Repeatability (1) 3.4 Time constant (1) 3.5 Adsorption (1) 3.6 division value (1) 4 General technical requirements (1) 4.1 Appearance (1) 4.2 Identification (1) 4.3 Dial (1) 5 measuring instrument control (2) 5.1 Verification conditions (2) 5.2 Verification project (2) 5.3 Verification method (3) 5.4 Processing of verification results (4) 5.5 Verification cycle (4) Appendix A Bimetal Rail Thermometer Verification Record Format (5) Appendix B Format of verification certificate and verification result page (6)

Introduction

JJG 1158 "Steel Thermometer" consists of the following two parts. --- Part 1. Bimetal rail thermometer; --- Part 2. Digital rail thermometer. In the use of this procedure for the rail thermometer temperature test, the corresponding procedure should be selected according to the type of rail thermometer section. This regulation is based on TG/GW115-2012 "High-speed railway ballastless track maintenance rules" (trial) Made. This procedure is the first release. Rail thermometer test procedure Part 1. Bimetal rail thermometer

1 Scope

This procedure is applicable to the first verification, subsequent verification and in-use inspection of the bimetal rail thermometer.

2 Overview

The bimetal rail thermometer (hereinafter referred to as the rail thermometer) uses a disk spiral type bimetal as a temperature sensing element, The needle indicates the thermometer that measures the rail temperature. The gauge can be divided into (-40~70) °C, (-30~) according to the measurement range. 70) °C and (-20~70) °C three specifications.

3 Metrological performance requirements

3.1 indication error The maximum allowable error of the gauge is ±1.0 °C. 3.2 Return error The return error of the rail thermometer should be no more than 1.0 °C. 3.3 Repeatability The repeatability of the gauge should be no more than 0.4 °C. 3.4 Time constant The time constant of the gauge should be no more than 90s. 3.5 Adsorption force The first verification of the adsorption force of the rail thermometer should be no less than 1.96N, and the subsequent verification should be no less than 1.47N. 3.6 division value The gauge value of the rail thermometer should be no more than 1 °C.

4 General technical requirements

4.1 Appearance The gauge should be transparent and should not have defects that prevent proper reading. Each component should not be corroded and the coating peeled off Phenomenon, the on-line thermometer allows for the above-mentioned defects that do not affect accuracy. The temperature sensitive working surface should not have local convexities and concaves Like, there should be no substances such as oxide film, grease and dust that affect the accuracy of temperature measurement. 4.2 Identification The dial should be marked with the name of the manufacturer or the factory standard, the model of the gauge, the factory number, and the temperature unit (°C). 4.3 dial The scores and other marks on the gauge of the gauge should be clear and accurate. The pointer should extend into the shortest dividing line 1/3~ Within 2/3. The pointer end width should not exceed the minimum index line width.

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