JJG 310-2002 English PDF

US$599.00 · In stock
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JJG 310-2002: Verification regulation of filled system thermometers
Status: Obsolete

JJG 310: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 310-2002	599	Add to Cart	3 days	Verification regulation of filled system thermometers	Obsolete
JJG 310-1983	279	Add to Cart	3 days	Verification Regulation of Pressure Thermometer	Obsolete

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Basic data

Standard ID: JJG 310-2002 (JJG310-2002)
Description (Translated English): Verification regulation of filled system thermometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A54
Word Count Estimation: 15,119
Date of Issue: 2002-11-04
Date of Implementation: 2003-05-04
Older Standard (superseded by this standard): JJG 310-1983
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the measurement range of the circular scale vapor pressure thermometer and measuring range -20 �� ~ +200 �� in a circular scale gas pressure thermometer -80 �� ~ +600 �� and fully compensated liquid pressure thermometer (hereinafter referred to as the thermometer), additional mechanical electric contact pressure thermometer (hereinafter referred to as electric contact thermometer) for initial verification, testing and use of subsequent testing.

JJG 310-2002: Verification regulation of filled system thermometers

---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.
Verification regulation of filled system thermometers National Metrology Verification Regulations of the People's Republic Pressure thermometer Released on November 11,.2002 Implementation of.2003-05-04 The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 310-1983 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on November 4,.2002, and It will take effect on May 4,.2003. Focal Point. National Temperature Measurement Technical Committee Main drafting unit. Tianjin Institute of Metrology and Technology This regulation entrusts the National Temperature Measurement Technical Committee to explain The main drafters of this procedure. Wang Lixin (Tianjin Institute of Metrology and Technology) Liu Jingli (Tianjin Institute of Metrology and Technology) Participate in the drafters. Shang Shisheng (Tianjin Institute of Metrology and Technology) Liu Chunwei (Tianjin Institute of Metrology and Technology) Li Ying (Tianjin Institute of Metrology and Technology)

table of Contents

1 Scope (1) 2 Overview (1) 3 Metrological performance requirements (1) 3.1 indication error (1) 3.2 Hysteresis (1) 3.3 Repeatability (1) 3.4 set point error (2) 3.5 Switching difference (2) 3.6 Alarm set point error (2) 4 General technical requirements (2) 4.1 Appearance (2) 4.2 Insulation resistance (2) 5 measuring instrument control (3) 5.1 Verification conditions (3) 5.2 Environmental conditions (3) 5.3 Verification project (3) 5.4 Verification method (4) 5.5 Verification result processing (5) 5.6 Verification cycle (5) Appendix A Pressure Thermometer Verification Record Format (6) Appendix B Example of Uncertainty in Measurement Results (7) Pressure thermometer verification procedure

1 Scope

This procedure is applicable to circular scale steam pressure thermometers and measuring ranges with measuring range from -20 °C to.200 °C. Circular scale gas pressure thermometer and fully compensated liquid pressure thermometer around -80 ° C ~ 600 ° C (hereinafter referred to as thermometer), the first inspection of the attached mechanical electric contact pressure thermometer (hereinafter referred to as electric contact thermometer) Determination, follow-up verification and in-use inspection.

2 Overview

The pressure thermometer works according to the principle that the volume or pressure of the working substance inside the closed system changes with temperature. As shown in Figure 1. The instrument closure system consists of a warm pack, a capillary tube and an elastic element, and the warm pack is filled with a working medium. When measuring the temperature, insert the temperature pack into the measured medium, affected by the temperature of the medium, the volume of the inner working medium of the warm pack or The pressure changes, the change is transmitted to the elastic element (such as the spring tube) via the capillary tube, and the elastic element is deformed and free. The displacement is generated at the end, and the pointer is driven to indicate the temperature value on the dial by means of the transmission mechanism. Figure 1 Typical structure of a pressure thermometer

3 Metrological performance requirements

3.1 indication error The relationship between the maximum allowable error of the thermometer indication and the accuracy level shall be in accordance with Table 1. 3.2 Hysteresis The hysteresis of the thermometer should not be greater than the absolute value of the maximum allowable error of the indication. 3.3 Repeatability The repeatability of the thermometer shall not be greater than 1/2 of the absolute value of the maximum allowable error of the indication. ......

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