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JJF 1911-2021 English PDF

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US$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1911-2021: (Calibration specification for weighing device of large-scale bulk material silo)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1911-2021	299	Add to Cart	3 days	(Calibration specification for weighing device of large-scale bulk material silo)	Valid

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Basic data

Standard ID: JJF 1911-2021 (JJF1911-2021)
Description (Translated English): (Calibration specification for weighing device of large-scale bulk material silo)
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Word Count Estimation: 15,170
Issuing agency(ies): State Administration for Market Regulation

JJF 1911-2021: (Calibration specification for weighing device of large-scale bulk material silo)

---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 specification for weighing device of large-scale bulk material silo) National Metrology Technical Specification of the People's Republic of China Specification for calibration of weighing devices for large-capacity bulk silos Published on 2021-07-28 2022-01-28 Implementation Released by the State Administration for Market Regulation Large range bulk material silo weighing device Calibration specification Focal Point. National Weighing Apparatus Metrology Technical Committee Main drafting unit. Zhejiang Institute of Metrology Participating in the drafting unit. Zhejiang Zheneng Yueqing Power Generation Co., Ltd. Shanghai Blue Arrow Weighing Technology Co., Ltd. Wuxi Metrology and Testing Institute This specification entrusts the National Weighing Apparatus Metrology Technical Committee to be responsible for the interpretation The main drafters of this specification. Yu Songqing (Zhejiang Institute of Metrology) Shang Xianping (Zhejiang Institute of Metrology) Mao Xiaohui (Zhejiang Institute of Metrology) Participating drafters. Ruan Guang (Zhejiang Zheneng Yueqing Power Generation Co., Ltd.) Xu Lei (Shanghai Blue Arrow Weighing Technology Co., Ltd.) Yang Dong (Wuxi Metrology and Testing Institute)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms and units of measurement(1) 3.1 Terminology (1) 3.2 Units of measurement (1) 4 Overview(1) 5 Metrology Characteristics(2) 6 Calibration Conditions(2) 6.1 Environmental conditions (2) 6.2 Standard device for calibration (2) 6.3 Installation requirements for hydraulic cylinders and force-bearing frames (2) 7 Calibration items and calibration methods (2) 7.1 Pre-calibration check(2) 7.2 Calibration items and calibration methods(3) 8 Expression of calibration results (3) 9 Recalibration interval(4) Appendix A Calibration Record Format(5) Appendix B Indication Error Measurement Result Uncertainty Evaluation Example(6) Appendix C Structure of a Typical Large-Scale Bulk Material Silo Weighing Device(10)

Introduction

JJF 1071 "Rules for the Compilation of National Metrology Calibration Specifications", JJF 1001 "General Metrology Terms and Definitions" and JJF 1059.1 "Assessment and Representation of Measurement Uncertainty" together constitute the basic series supporting the formulation of this specification specification. In the formulation process of this specification, it is considered that the weighing range of the calibrated weighing device is large, and it is difficult to use standard weights to carry out Therefore, the load cell is used as the load conversion measurement unit, and the standard load measurement device is used to measure the large range of bulk materials. The weighing characteristics of the bin weighing device are calibrated. This specification is published for the first time. Specification for calibration of weighing devices for large-capacity bulk silos

1 Scope

This specification applies to the use of standard load measuring devices for groups consisting of large silos, load cells, weighing indicators, etc. The calibration of the finished bulk weighing device (hereinafter referred to as the weighing device).

2 Reference documents

This specification references the following documents. JJG539 Digital Indicating Scale JJG669 Load Cell JJF 1059.1 Evaluation and representation of measurement uncertainty JJF 1181 Weighing Instrument Measurement Terms and Definitions For dated references, only the dated version applies to this specification; for undated references The latest version (including all amendments) applies to this specification.

3 Terminology and units of measurement

3.1 Terminology The terms and definitions defined in JJF 1181 and the following apply to this specification. A device for determining the mass value of bulk materials, usually having a carrier which is carried by a It is composed of silos exceeding 100t (including 100t). A device that applies a standard load to a carrier with the force generated by a hydraulic cylinder. 3.2 Units of measurement The measurement unit used by the weighing device shall adopt the legal measurement unit, including. kilogram (kg) and ton (t).

4 Overview

Large-scale bulk material silo weighing device is a special type of fixed non-automatic scale, and its maximum weighing capacity is usually greater than 100t (including 100t). Uses. Mainly used in the weighing and measurement of bulk materials, is the weighing and measurement of bulk materials in thermal power plants, ports, etc. one of the main equipment. Principle. The bulk material is placed in the carrier (hopper), and the electrical signal generated by the load cell is processed through data The device converts and calculates, and the weighing result is displayed by the indicating device. Structure. The structure of the weighing device is mainly composed of a carrier (hopper), a load cell, and a weighing indicator. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1911-2021_English be delivered?

Answer: Upon your order, we will start to translate JJF 1911-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1911-2021_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1911-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.