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JJG 1141-2017 English PDF

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JJG 1141-2017: Applanation Tonometers
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
JJG 1141-2017329 Add to Cart 3 days Applanation Tonometers Valid

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Basic data

Standard ID: JJG 1141-2017 (JJG1141-2017)
Description (Translated English): Applanation Tonometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Word Count Estimation: 14,198
Date of Issue: 2017-09-26
Date of Implementation: 2017-12-26
Regulation (derived from): General Administration of State Quality Inspection Announcement 2017 No. 78
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine

JJG 1141-2017: Applanation Tonometers

---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.
(Test procedure for contact - type flattening tonometer) People's Republic of China National Metrological Verification Procedures Contact pressure tonometer 2017-09-26 Posted 2017-12-26 Implementation General Administration of Quality Supervision, Inspection and Quarantine released Contact pressure tonometer test procedures The focal point. National pressure measurement technical committee Drafting unit. China Institute of Metrology Shanghai Institute of Measurement and Testing Technology This procedure entrusts the National Pressure Metering Technology Committee to explain The main drafters of this procedure. Zhu Jianping (China Institute of Metrology) Li Fei (China Institute of Metrology) Juan (Shanghai Institute of Measurement and Testing Technology) Participate in the drafters. Yang Lei (China Institute of Metrology) Zhang Zhongli (Shanghai Institute of Measurement and Testing Technology)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Terms and measurement units (1) 3.1 Intraocular pressure (1) 3.2 unit of measure (1) 4 Overview (1) 5 measurement performance requirements (2) 5.1 The maximum allowable error of force (2) 5.2 flattening circle diameter (2) 5.3 Measuring head surface flatness (2) 6 General technical requirements (3) 6.1 appearance requirements (3) 6.2 Measuring head (3) 7 measuring instruments control (3) 7.1 test conditions (3) 7.2 test items (4) 7.3 test method (4) 7.4 test results of the treatment (5) 7.5 test cycle (5) Appendix A Tonometer test original record format (6) Appendix B pressure tonometer test certificate/test results notice page format (7)

Introduction

This procedure mainly refers to the international standard ISO 8612-2009 "Ophthalmic instrument - tonometer" (Ophthalmicin- struments-Tonometers) content, and according to JJF1002-2010 "national metrological verification rules writing regulations Then, "JJF1001-2011" common measurement terms and definitions "and JJF1059.1-2012" Measurement Uncertainty Evaluation Set and said "and other technical specifications. This is the first release of this procedure. Contact pressure tonometer test procedures

1 Scope

This procedure applies to the optical - mechanical structure, measuring head force (hereinafter referred to as the force) range includes at least (0 ~ 49) mN contact pressure tonometer (hereinafter referred to as pressure tonometer) the first test, the follow-up test and make Used to check.

2 reference documents

The procedures cited in the following documents. Flatness error detection ISO 8612-2009 ophthalmic instruments - tonometer (Ophthalmicinstruments-Tonometers) For dated references, only the dated version applies to this specification. All references to the date without reference The latest version (including all amendments) applies to this procedure.

3 Terms and measurement units

The following terms and definitions apply to this procedure. 3.1 Intraocular pressure intraocular pressure (IOP) [ISO 8612-2009] Refers to the pressure within the eyeball, referred to as intraocular pressure, in units of kPa (kPa). Unit of measurement 3.2 unitofmeasurement The units of measurement used in this regulation are milli-cow (mN) and millimeter (mm).

4 Overview

Tonometer is a special instrument for measuring intraocular pressure in ophthalmology. The working principle of the tonometer is based on the Imbert-Fick principle, treating the eyeball as an ideal surface dry Of the elastic thin-walled sphere, then the internal pressure P, force F and corneal flatten area A has the following relationship. P = F/A (1) Measurement is usually used in conjunction with the slit lamp, with a flattened tonometer measuring head flattened a certain area of the cornea, according to the The required force to determine intraocular pressure (see Figure 1). Figure 1 flattening tonometer measurement diagram
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