This regulation applies to initial verification, subsequent verification and in-use verification of laboratory-service and portable dissolved oxygen meters with covered-membrane-electrode (hereinafter referred to as the instrument) that have a measuring range of (0 ~ 20)mg/L.
Basic Data
Standard ID
JJG 291-2008 (JJG291-2008)
Description (Translated English)
Verification regulation of dissolved oxygen meter with covered-membrane-electrode
Sector / Industry
Metrology and Measurement Industry Standard
Classification of Chinese Standard
A61
Classification of International Standard
17.020
Word Count Estimation
16,125
Date of Issue
2008-12-23
Date of Implementation
2009-06-23
Older Standard (superseded by this standard)
JJG 291-1999
Regulation (derived from)
?AQSIQ Announcement 2008 No.143
Issuing agency(ies)
General Administration of Quality Supervision, Inspection and Quarantine
Summary
This standard applies to real-time measurement of body surface potential heart-analog single-channel, multi-channel ECG initial verification and subsequent verification, This procedure does not apply to digital ECG machine, vector ECG, ECG and other nonlinear systems and ECG information processing and measuring instruments for special purposes.
