GB/T 9249-2008Self-balance recorders and indicators for use in industrial-process measurement and conrol systems (English PDF)

Foreword

The revised standard and replaces GB/T 9249-1988 "industrial process measurement and control systems automatically balance recorders and indicators." This standard and GB/T 9249-1988 the main differences are as follows.

--- In accordance with the provisions of GB/T 1.1-2000 were editorial changes;

--- Update the normative references;

--- Table 1 Accuracy class increased by 0.2 of a file, 0.3 in brackets, indicating not recommended;

--- Increased supply voltage short interruptions, low supply voltage drop, electromagnetic radiation, electrostatic discharge immunity requirements;

, GB/T 18271.2-2000 and GB/T --- test methods according to the provisions of GB/T 3386.1-2007 18271.3-2000 of carried out;

Title --- Chapter 7 to "storage." The standard proposed by China Machinery Industry Federation.

The standard measurement and control of industrial processes by the National Standardization Technical Committee at its first Technical Committee (SAC/TC124/SC1) Centralized.

1 Scope

This standard specifies the industrial process measurement and control systems automatically balance recorders and indicators (hereinafter referred to as instrumentation) of the basic parameters Number of requirements, test methods and inspection rules.

This standard applies to industrial process measurement and control systems with electronic automatic potentiometer, balancing bridge electrical signal and analog recorder Indicator (hereinafter referred to as the potentiometer and bridge). Potentiometer input side of the outer resistance rating of not more than 10000ohm; transmission bridge Rated into the outer side of the resistance is not greater than 1500ohm.

This standard applies only under normal operating conditions additional technical requirements under the instrument instrument, special working conditions of use does not belong Scope of this standard. This standard includes additional requirements nor the instrument with an additional device.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 3386.1-2007 industrial process control systems with electric and pneumatic analogue chart recorders - Part 1: Performance Evaluation party Method (IEC 60873-1:2003, IDT)

Tests under reference conditions. GB/T 18271.2 process measurement and control devices - General methods and procedures for evaluating performance - Part 2 (GB/T 18271.2-2000, idt IEC 61298-2:1995)

GB/T 18271.3 process measurement and assessment methods and procedures - Part 3 common control device performance. effects of influence quantities test (GB/T 18271.3-2000, idt IEC 61298-3:1998)

GB/T 22112-2008 industrial automation, instrumentation and arrangement of terminals logo

GB/T 22162-2008 panel and rack - mounted industrial process measurement and control instrumentation disk and hole size (IEC 60668. 1980, IDT)

JB/T 9266-1999 indicator Temperature measurement range

JB/T 9329-1999 instrumentation transportation, transportation, storage and basic environmental conditions and test methods

3 Basic parameters