JJG 488-2018
Instantaneous Daily Clock Time Difference Testers (English Version)

Standard No.

JJG 488-2018

Language

Chinese, Available in English version

Release Date

2018

Published By

National Metrological Verification Regulations of the People's Republic of China

Latest

JJG 488-2018

Replace

JJG 488-2008

Scope

This procedure is applicable to the initial calibration, subsequent calibration and in-use inspection of various types of instantaneous daily difference measuring instruments.

JJG 488-2018 Referenced Document

• JJG 180 Verification Regulation of Crystal Oscillators inside the Electrical Measuring Instruments*， 2024-04-20 Update

JJG 488-2018 history

• 2018 JJG 488-2018 Instantaneous Daily Clock Time Difference Testers
• 2008 JJG 488-2008 Verification Regulation of Watch Tester
• 1998 JJG 488-1998 Verification Regulation of Watch Tester