JJF 1257-2010 English PDF

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JJF 1257-2010: Calibration guideline of the temperature block calibrators
Status: Valid

JJF 1257: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1257-2010	369	Add to Cart	3 days	Calibration guideline of the temperature block calibrators	Valid
JJF 1257-1990	279	Add to Cart	3 days	(100 to 150 ml capacity reference operating technical specifications)	Obsolete

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Basic data

Standard ID: JJF 1257-2010 (JJF1257-2010)
Description (Translated English): Calibration guideline of the temperature block calibrators
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A54
Classification of International Standard: 17.200
Word Count Estimation: 16,149
Date of Issue: 2010-06-10
Date of Implementation: 2010-09-10
Quoted Standard: JJF 1071-2000; EURAMET/CG-13/V.01
Regulation (derived from): AQSIQ Announcement No. 59 of 2010
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the temperature range of -80��C ~ 1300��C temperature dry block calibrator (hereinafter referred to as dry body spoon bamboo calibration temperature should not exceed the dry body furnace manufacturers given temperature range.

JJF 1257-2010: Calibration guideline of the temperature block calibrators

---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.
Calibration guideline of the temperature block calibrators People's Republic of China National Metrology Technical Specifications Dry style Temperature calibration calibration method Issued on. 2010-06-10 2010-09-10 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Dry style Temperature calibration calibration method theTemp This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on June 10, 2010, and from From September 10, 2010 into effect. Focal point. the National Technical Committee of temperature measurement Responsible for drafting unit. China Institute of Metrology Participated in the drafting. US AMETEK, Inc. Beijing Representative Office Beijing Const Instrument Technology Co., Ltd. Shenzhen City Councilor Ikon Instrument Technology Co., Ltd. Fluke Companies This specification temperature measurement provisions of the National Technical Committee is responsible for interpretation The main drafters of this specification. Zheng Wei (China Institute of Metrology) Drafters participate. Wang Yulan (China Institute of Metrology) Next to the East (China Institute of Metrology) Large Swiss (United States AMETEK, Inc. Beijing Representative Office) He Xin (Beijing Const Instruments Technology Co., Ltd.) Lu Xiaoyun (Shenzhen Ai Ikon Instruments Co., Ltd.) Chen Yu (USA Fluke)

table of Contents

1 Scope (1) 2. Referenced Documents (1) 3 Terms and Definitions (1) 4 Overview (1) 5 Metrological characteristics (2) Temperature deviation 5.1 (2) 5.2 Other dry body furnace temperature characteristic (2) Calibration Condition 6 (2) Thermometer measuring 6.1 and ancillary equipment (2) 6.2 with the bush (2) Environmental conditions 6.3 (3) 7 calibration items and methods (3) 7.1 calibration items (3) 7.2 Calibration method (3) Expression 8 calibration results (5) 8.1 Calibration report information (5) 8.2 calibration and measurement uncertainty description (6) Appendix A dry body furnace temperature deviation uncertainty assessment (7) Appendix B axial temperature distribution factors affect the measurement method (10) C Dry Block Recommended use appendix (11) Dry style Temperature calibration calibration method

1 Scope

The calibration method this specification is applicable to a temperature range of -80 ℃ ~ 1300 ℃ temperature calibrator dry style (Hereinafter referred to as dry body furnace) calibration. Calibration temperature should not exceed the dry body furnace manufacturer given temperature range.

2 Citations

JJF 1071-2000 National Calibration Specifications writing rules EURAMET/cg-13/v.01 CalibrationofTemperatureBlockCalibrators (dry style warm Calibration Calibration) When using this specification it should be noted that using the currently valid version of the documents cited.

3 Terms and Definitions

3.1 Dry Block temperatureblockcalibrator Dry Block is to use the built-in equalizing block action to ensure uniform temperature equalizing block insert the thermometer is calibrated with the reference standard Consistent temperatures. 3.2 with bush adapterbushing Between the dry furnace body temperature thermometer hole and placed a metal liner, its purpose is to make the thermometer and the temperature between holes Good thermal conductivity. Metal bush dry body furnace manufacturer's recommended materials should be used. 3.3 measurement area measurementzone Dry Block Temperature bore area for calibrating thermometers. Its position is fixed, usually located in the bottom hole temperature unit. If the measurement area is in a different location should be clearly stated.

4 Overview

Dry body furnace is mainly used in thermometer calibration, which consists of at least the following sections. Solid equalizing block, all control Isothermal block temperature regulation means for measuring the temperature equalizing block sensor and temperature display (also by temperature control Table to display). These components may be a combination unit, or each member has a separate unit clear division of labor. Dry furnace body having a small size and easy to carry, fast heating and cooling characteristics, with a relatively stable temperature display Temperature source, to provide a reference for on-site temperature calibration. Dry Block provide a more stable, uniform temperature measurement area to be corrected thermometer, measuring area should have at least 40mm long uniform temperature zone. Current temperature values can be displayed in the temperature display. Dry Block temperature display Value is usually measured temperature value temperature sensor, temperature sensor accuracy of placement and location will affect the measurement area The accuracy of the temperature. Because the characteristics of the dry furnace body structure itself, the use of dry furnace body thermometer calibration, the calibration results are vulnerable to temperature calibration Movies meter number, shape, size, matching the hole temperature, dry environment and calibrate itself furnace body temperature characteristics and other factors ring. When using body dry oven thermometer calibration, use the calibration results to consider the impact of these factors. In order to reduce school ......

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