HOME Cart(12) Quotation About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189760 (18 Oct 2025)

JJG 500-2005 English PDF

US$319.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 500-2005: Verification Regulation of Electrolytic Hygrometers
Status: Valid

JJG 500: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 500-2005	English	319	Add to Cart	3 days [Need to translate]	Verification Regulation of Electrolytic Hygrometers	Valid	JJG 500-2005
JJG 500-1987	English	279	Add to Cart	3 days [Need to translate]	Verification Regulation of Analytical Instrument of Trace Water by Electrolytic Method	Obsolete	JJG 500-1987

PDF similar to JJG 500-2005

Standard similar to JJG 500-2005

JJG 631 JJG 635 JJG 551 JJG 680 JJG 499

Basic data

Standard ID	JJG 500-2005 (JJG500-2005)
Description (Translated English)	Verification Regulation of Electrolytic Hygrometers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A61
Classification of International Standard	17
Word Count Estimation	12,142
Date of Issue	2005-09-05
Date of Implementation	2006-03-05
Older Standard (superseded by this standard)	JJG 500-1987
Quoted Standard	State Administration of Quality Supervision, Inspection and Quarantine Notice No. 135
Regulation (derived from)	State Administration of Quality Supervision, Inspection and Quarantine Notice No. 135
Summary	This standard applies to electrolytic hygrometer initial verification, testing and use of follow-up inspection. Electrolytic hygrometer shape identification or prototype tests for measuring the performance test may be carried out with reference to the rules.

JJG 500-2005: Verification Regulation of Electrolytic Hygrometers

---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.
Verification Regulation of Electrolytic Hygrometers National Metrology Verification Regulations of the People's Republic Electrolytic humidity meter Released on.2005-09-05 2006-03-05 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 500-1987 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 5,.2005, and It will take effect on March 5,.2006. Focal Point. National Physical and Chemical Metrology Technical Committee Main drafting unit. National Standards Research Center Participated in the drafting unit. Chengdu Instrument Factory This procedure entrusts the National Physical and Chemical Metrology Technical Committee to explain The main drafters of this procedure. Li Zhanyuan (National Center for Standard Materials Research) Participate in the drafters. Lin Weiguo (Chengdu Instrument Factory) Yi Hong (National Standards Research Center) Ren Changqing (National Reference Materials Research Center)

1 Scope (1) 2 Overview (1) 3 Metrological performance requirements (2) 4 General technical requirements (2) 4.1 Appearance of the instrument (2) 4.2 Instrument Circuit System (2) 4.3 pneumatic system (2) 4.4 Instrument background value (2) 4.5 Measurement range (2) 5 measuring instrument control (2) 5.1 Verification conditions (2) 5.2 Verification items and verification methods (3) 5.3 Processing of verification results (4) 5.4 Verification cycle (4) Appendix A Electrolytic Hygrometer Calibration Record Format (5) Appendix B Format of Electrolytic Hygrometer Calibration Certificate and Verification Result Notice (6) Electrolytic humidity meter verification procedure

1 Scope

This procedure is applicable to the first verification, subsequent verification and in-use inspection of the electrolysis hygrometer. Electrolytic humidity meter For the measurement performance test in type identification or prototype test, refer to this procedure.

2 Overview

Electrolytic humidity meter is widely used in petrochemical, electronic, electric power, metallurgical and other industrial sectors for gas humidity detection. Includes intermittent measurements and online measurements. The instrument uses an electrolytic method to measure the humidity in a gas, and the range generally refers to less than 1000 μL/L. The working principle is. The gas to be measured flows through a special structure of the electrolytic cell, and the water vapor is absorbed by the P2O5 film on the surface of the electrode and is electrolyzed. For hydrogen and oxygen, P2O5 is regenerated at the end of the reaction. The reaction process can be expressed as. P2O5 H2O=2HPO3 (1) 2HPO3=H2↑ 2O2↑ P2O5 (2) Merger (1), (2) H2O=H2↑ 2O2↑ (3) In the above reaction, the amount of water to be electrolyzed is proportional to the amount of electricity passing through the electrolytic cell. The measured gas continuously passes through the electrolysis The pool in which the water vapor is completely absorbed by the P2O5 film on the surface of the electrode is electrolyzed. When the absorption and electrolysis process is reached At equilibrium, the electrolysis current is proportional to the humidity of the gas. This is the quantitative basis for the instrument. If the ambient temperature, pressure and measured gas flow rate are known, according to Faraday's law of electrolysis and gas state equations The relationship between the derived electrolysis current and the moisture content of the gas to be measured is. I= QpT0FVr10-4 3p0TV0 (μA) (4) It can also be simplified as. I=1.4358×10-1VrQ pT0 p0TV0 (μA) (5) In the formula. I --- electrolysis current of water, μA; Vr --- the water vapor content of the gas to be tested, μL/L; Q --- measured gas flow, mL/min; p --- atmospheric pressure, Pa; P0 --- standard atmospheric pressure, 101325Pa; T --- ambient temperature, K; T0 --- critical absolute temperature, 273.15, K; F --- Faraday constant, 96484.56C/mol;

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 500-2005_English be delivered?

Answer: Upon your order, we will start to translate JJG 500-2005_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 500-2005_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 500-2005_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 [email protected]. 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 JJG 500-2005?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 500-2005 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.