GB/T 6999-2010 English PDF

US$6239.00 · In stock
Delivery: <= 9 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 6999-2010: Relative humidity tables for environmental test
Status: Valid

GB/T 6999: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6999-2010	6239	Add to Cart	9 days	Relative humidity tables for environmental test	Valid
GB/T 6999-1986	RFQ	ASK	3 days	Relative humidity tables for environmental test	Obsolete

Similar standards

GB/T 14092.1   GB/T 14092.2   GB/T 4798.2   GB/T 4798.11   GB/T 4797.3   GB/T 4798.3   

Basic data

Standard ID: GB/T 6999-2010 (GB/T6999-2010)
Description (Translated English): Relative humidity tables for environmental test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A21
Classification of International Standard: 19.020
Word Count Estimation: 297,226
Date of Issue: 2010-11-10
Date of Implementation: 2011-05-01
Older Standard (superseded by this standard): GB/T 6999-1986
Regulation (derived from): Announcement of Newly Approved National Standards 2010 No. 8 (No. 163 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the environmental tests in the calculation of the relative humidity. This standard applies to environmental testing using spherical or cylindrical mercury thermometers measure wet and dry bulb temperature check count relative humidity.

GB/T 6999-2010: Relative humidity tables for environmental test

---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.
Relative humidity tables for environmental test ICS 19.020 A21 National Standards of People's Republic of China Replacing GB/T 6999-1986 Environmental testing relative humidity tables Issued on. 2010-11-10 2011-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Preface Ⅰ 1 Scope 1 2 Calculation Formula 1 3 search count 1 Appendix A (informative) This standard GB/T 6999-1986 modify the description 294 Table 1 psychrometer coefficient A value table 1 Table 2a1 spherical mercury thermometers relative humidity tables P = 110kPa, A = 0.857 × 10-3 ℃ -1 (0.4m/s) 3 Table 2a2 columnar mercury thermometers relative humidity tables P = 110kPa, A = 0.815 × 10-3 ℃ -1 (0.4m/s) 21 Table 2b spherical mercury thermometers relative humidity tables P = 110kPa, A = 0.7947 × 10-3 ℃ -1 (0.8m/s) 39 Table 2c spherical, cylindrical mercury thermometers relative humidity tables P = 110kPa, A = 0.662 × 10-3 ℃ -1 (2.5m/s) 57 Table 3a1 spherical mercury thermometers relative humidity tables P = 100kPa, A = 0.857 × 10-3 ℃ -1 (0.4m/s) 75 Table 3a2 columnar mercury thermometers relative humidity tables P = 100kPa, A = 0.815 × 10-3 ℃ -1 (0.4m/s) 93 Table 3b spherical mercury thermometers relative humidity tables P = 100kPa, A = 0.7947 × 10-3 ℃ -1 (0.8m/s) 111 Table 3c spherical, cylindrical mercury thermometers relative humidity tables P = 100kPa, A = 0.662 × 10-3 ℃ -1 (2.5m/s) 129 Table 4a1 spherical mercury thermometers relative humidity tables P = 90kPa, A = 0.857 × 10-3 ℃ -1 (0.4m/s) 147 Table 4a2 columnar mercury thermometers relative humidity tables P = 90kPa, A = 0.815 × 10-3 ℃ -1 (0.4m/s) 165 Table 4b spherical mercury thermometers relative humidity tables P = 90kPa, A = 0.7947 × 10-3 ℃ -1 (0.8m/s) 183 Table 4c spherical, cylindrical mercury thermometers relative humidity tables P = 90kPa, A = 0.662 × 10-3 ℃ -1 (2.5m/s) 201 Table 5a1 spherical mercury thermometers relative humidity tables P = 80kPa, A = 0.857 × 10-3 ℃ -1 (0.4m/s) 219 Table 5a2 columnar mercury thermometers relative humidity tables P = 80kPa, A = 0.815 × 10-3 ℃ -1 (0.4m/s) 237 Table 5b spherical mercury thermometers relative humidity tables P = 90kPa, A = 0.7947 × 10-3 ℃ -1 (0.8m/s) 255 Table 5c spherical, cylindrical mercury thermometers relative humidity tables P = 80kPa, A = 0.662 × 10-3 ℃ -1 (2.5m/s) 273 Table 6 flat water saturation vapor pressure (kPa) 291 Table A.1 This standard GB/T 6999-1986 modify the description 294

Foreword

This standard is GB/T 6999-1986 "Test Environment relative humidity tables" amendments. This standard replaces GB/T 6999-1986 "Test Environment relative humidity tables." This standard compared with GB/T 6999-1986, the main differences are as follows. --- According to GB/T 1.1-2000 "Standardization Guide Part 1. Structure and rules are written standard" requirements of the grid layout The formula has been modified; --- Original standard table 2.1 added table --- Table No. 1, the original table 1a1, table 1a2, Table 1b, Table 1c successively changed tables 2a1, Table 2a2, Table 2b, Table 2c, original Table 2, Table 3, Table 4 and Table 5 other No. successively amended accordingly; --- Increase the informative Appendix A; --- On the 2.2 formula and its parameters is corrected, a detailed comparison see Appendix A; --- Table 2a1, Table 3b and Table 5, part of the data is corrected, a detailed comparison see Appendix A. Appendix A of this standard is an informative annex. This standard by the national electric and electronic products environmental conditions and environmental tests for Standardization Technical Committee (SAC/TC8) and focal points. This standard was drafted. Guangzhou Electric Apparatus Research Institute, Shenzhen Institute of Standards and Technology, the Ministry of Industry and Information Technology Institute of Electronics V. The main drafters of this standard. Chen Xinxin, Wenli Feng, Huang Kaiyun, Liming Fang, Wang Lei. This standard replaces the standards previously issued as follows. --- GB/T 6999-1986. Environmental testing relative humidity tables

1 Scope

This standard specifies the method for computing the relative humidity of the test environment. This standard applies to environmental tests with spherical or cylindrical mercury thermometers measuring wet bulb temperature check count relative humidity.

2 formula

2.1 Tables 2 to 5 were using spherical or cylindrical mercury thermometer measuring wet and dry bulb temperature in lookup table with relative humidity. The formula as follows. U = eew × 100% = etw-AP (T-tw) ew × 100% Where. U --- relative humidity; e --- the actual vapor pressure, kPa; ew --- dry bulb temperature t corresponding to the plane of pure water saturation vapor pressure, kPa; etw --- wet-bulb temperature tw corresponding to the plane of pure water saturation vapor pressure, kPa; A --- psychrometer coefficient, ℃ -1; its value due to the type of wet and dry bulb thermometer wet and dry bulb thermometer bulb and wind speed at the decision, as shown in Table 1; P --- Pressure, kPa; respectively 110kPa, 100kPa, 90kPa, 80kPa four grades; (T-tw) --- the difference between wet and dry bulb temperature, ℃; taking the difference is 0 ℃ ~ 16.0 ℃; wherein the interval 0 ℃ ~ 5.0 ℃ 0.1 ℃; 5.0 ℃ ~ 11.0 ℃ interval of 0.2 ℃; 11.0 ℃ ~ 16.0 ℃ interval of 0.5 ℃. Table 1 psychrometer coefficient A value table Wet and dry bulb thermometer type Wind velocity 0.4m/s 0.8m/s 2.5m/s Spherical 0.857 × 10-3 0.7947 × 10-3 Columnar 0.815 × 10-3 - 0.8662 × 10-3 2.2 Table 6 for the flat water saturation vapor pressure ew (etw), kPa; calculated as follows. lgew = 10.79574 (1-T1/T) -5.028lg (T/T 1) 1.50475 × 10-4 1-10-8.2969 (T/T 1-1 []) 0.42873 × 10-3 104.76955 (1-T1/T) - [] 1 -0.21386 Where. T1 = 273.16K (triple point of water temperature; K, absolute temperature) T = 273.15 t

3 check calculation method

3.1 look-up table method 3.1.1 pressure measurement P, single-digit rounding. 3.1.2 measurement of wet and dry bulb thermometer bulb at a wind speed V, based on wind speed V and the type of wet and dry bulb thermometer isolated corresponding wet in Table 1 Coefficient table A. Note. Measured wind speed and wind speed in Table 1 below is not the same, you can choose a small difference with the measured wind speed of a wind speed. 3.1.3 readout mercury wet and dry bulb thermometer dry bulb temperature and wet-bulb temperature t tw, and find the wet and dry bulb temperature difference (t-tw). 3.1.4 isolated portion corresponding in Tables 2 to 5, according to P, A, and wet and dry bulb thermometer mercury type. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 6999-2010_English be delivered?

Answer: Upon your order, we will start to translate GB/T 6999-2010_English as soon as possible, and keep you informed of the progress. The lead time is typically 6 ~ 9 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 6999-2010_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 6999-2010_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 6999-2010?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6999-2010 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.