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JJG 620-2008Verification Regulation of Critical Flow Venturi Nozzle (English PDF)

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine

Level / Type

National · Mandatory

Issue date

May 23, 2008

Implementation date

November 23, 2008

Scope

JJG 620-2008 (Verification Regulation of Critical Flow Venturi Nozzle) is available as an English-translated PDF.

JJG 620-2008 — Verification Regulation of Critical Flow Venturi Nozzle

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Document preview — JJG 620-2008

National Standard of the People's Republic of China

ICS: 17.120
Classification: A 53
Replacing: JJG 620-1994

Issued by: General Administration of Quality Supervision, Inspection and Quarantine

What this standard covers1
Document data2
Standards quoted by this document3

What this standard covers

This standard applies to standard vertex refractometer (including objective standards analog eye, subjective standards simulated eye, cylinder standard device, refractor IPD standard device) initial verification, follow-up tests and in-service inspection.

Document data

International classification (ICS): 17.120.

Chinese classification (CCS): A53.

Estimated length of the Chinese original: 39,380 words.

Adopted international standard: ISO 9300-2005, NEQ.

Supersedes the earlier edition JJG 620-1994.

Standards quoted by this document

JJF 1001-1998; JJF 1004-2004; JJF 1059-1999

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 26 pages — is available in the English PDF.

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