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1 Scope: This type evaluation outline is applicable to the type evaluation of sulfur dioxide gas detectors (including sulfur dioxide gas detection alarms and sulfur dioxide gas analyzers) (hereinafter referred to as instruments). 2. Reference JJG 551-2003 Sulfur dioxide gas detector GB/T 11606-2007 Analytical instruments Environmental testing methods GB12358-2006 General technical requirements for workplace environmental gas detection and alarm devices GB/T 17626.2-2006 Electromagnetic compatibility testing and measurement techniques Electrostatic discharge immunity test GB/T 17626.3-2006 Electromagnetic compatibility testing and measurement techniques Radio frequency electromagnetic field radiation immunity test GB/T 17626.4-2008 Electromagnetic compatibility, testing and measurement The clauses in the aforementioned documents on measurement technology and electrical fast transient pulse group immunity test become the clauses of this outline through the reference surface of this outline. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this outline. Therefore, all parties who have reached agreements based on this outline are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version (including all amendments) applies to this outline. The detection principles of the instrument mainly include electrochemical, thermal conductivity, optical, etc. The instrument mainly consists of sensors, amplification circuits, and displays. According to the working status, it can be divided into non continuous measuring instruments and continuous measuring instruments. According to the sampling method, it can be divided into diffusion type and suction type. It can be divided into portable and fixed types according to its usage Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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