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JJF 1407-2013 English PDF

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JJF 1407-2013: Calibration Specification for Thermometers of WBGT-index Meters
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Basic data

Standard ID JJF 1407-2013 (JJF1407-2013)
Description (Translated English) Calibration Specification for Thermometers of WBGT-index Meters
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A54
Classification of International Standard 17.200
Word Count Estimation 19,183
Quoted Standard JJG 205-2005; GB/T 4200-2008; GB/T 17244-1998
Regulation (derived from) ?AQSIQ Announcement 2013 No. 74;
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to WBGT index meter thermometer calibration. WBGT index meter including natural wet bulb thermometer, black bulb thermometer and a dry bulb thermometer. Natural wet bulb thermometer measuring range: 5��C ~ 40��C, black bulb thermometer

JJF 1407-2013: Calibration Specification for Thermometers of WBGT-index Meters

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Calibration Specification for Thermometers of WBGT-index Meters People's Republic of China National Metrology Technical Specifications WBGT Index instrument thermometer calibration specification Issued on. 2013-05-13 2013-08-13 implementation The State Administration of Quality Supervision, Inspection and Quarantine released WBGT Index instrument thermometer calibration specification Focal point. the National Technical Committee of temperature measurement The main drafting units. Shandong Institute of Metrology Zhejiang Institute of Metrology Participated in the drafting unit. Xinjiang Institute of Measurement and Testing Beijing Institute of Metrology detection This specification commissioned the National Technical Committee is responsible for interpretation of temperature measurement The main drafters of this specification. Sun Shulan (Shandong Province Institute of Metrology) Zhang Jiong (Shandong Province Institute of Metrology) Zhanghua Wen (Shandong Province Institute of Metrology) Shen Zhong only (Zhejiang Institute of Metrology) Drafters participate. Ma Xiaochun (Xinjiang Institute of Measurement and Testing) With meritorious (Xinjiang Institute of Measurement and Testing) Zhang Yi farmers (Beijing Institute of Metrology detection)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Terms and definitions (1) 3.1 WBGT index (1) 3.2 WBGT Index instrument thermometer (1) 3.3 thermal load (1) 3.4 Effective area (1) 4 Overview (1) 5 Metrological characteristics (2) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 Standard device and ancillary equipment (3) 7 calibration items and calibration methods (3) 7.1 calibration items (3) 7.2 Calibration method (3) 8 calibration results expression (5) 9 Recalibration interval (5) Appendix A WBGT Index instrument thermometer calibration original record format (6) Appendix B Calibration Certificate page format (7) Appendix C measurement (indication error) Uncertainty evaluation of a sample (8) Appendix D measurements (indication error) Uncertainty Evaluation of Example Two (11)

Introduction

This specification based JJF 1071-2010 "National Calibration Specifications writing rules" establishment, where measurement uncertainty Evaluation of in accordance JJF 1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement" in. The specification for the first time to develop. WBGT Index instrument thermometer calibration specification

1 Scope

This instruction applies to WBGT Index instrument thermometer calibration. WBGT Index instrument, including natural wet bulb thermometer Meter, the black bulb thermometer and dry bulb thermometer. Natural wet bulb thermometer measuring range. 5 ℃ ~ 40 ℃; black-bulb temperature Meter measuring range. 20 ℃ ~ 120 ℃; dry bulb thermometer measuring range. 10 ℃ ~ 60 ℃. 2. References This specification refers to the following documents. JJG205-2005 mechanical hygrometer GB/T 4200-2008 hot job classification GB/T 17244-1998 thermal environment based on WBGT index (wet bulb globe temperature) of the thermal load workers Evaluation charge For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 Terms and definitions

3.1 WBGT index WBGT-index Also known as the wet bulb, black bulb temperature, is a comprehensive evaluation of the basic parameters of human exposure to the operating environment of the thermal load, single Bit ℃. [GB/T 4200-2008,3.4] 3.2 WBGT Index instrument thermometer thermometerofWBGT-indexmeter WBGT Index instrument measuring natural wet bulb temperature, globe temperature, dry bulb temperature of the thermometer. 3.3 heat load heatstress The extent of the human body heat when operating in a hot environment to WBGT index, said heat depends on manual labor And the amount of heat exchange between the environment and human characteristics. [GB/T 17244-1998,2.2] 3.4 effective area effectivearea Meet the appropriate space temperature fluctuation and uniformity required in an incubator, or product specification prescribed area.

4 Overview

WBGT index is a basic parameter of human exposure to environmental heat load. WBGT Index instrument were measured Natural wet bulb temperature, globe temperature, dry bulb temperature and the three parameters, then get WBGT index calculated by the formula. WBGT Index instrument usually consists of a temperature sensor and instrument host of two parts, natural wet bulb temperature, black ball temperature And dry-bulb temperature of the three sensors mounted on the same bracket, there are two connections and a direct connection by measuring cable Forms. FIG. 1 (a) and 1 (b) below.

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