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GB/T 25917.2-2019 English PDF

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US$184.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 25917.2-2019: Uniaxial fatigue testing systems -- Part 2: Dynamic calibration device (DCD) instrumentation
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25917.2-2019	184	Add to Cart	3 days	Uniaxial fatigue testing systems -- Part 2: Dynamic calibration device (DCD) instrumentation	Valid

Similar standards

GB/T 17394.2 GB/T 16825.1 GB/T 17394.3 GB/T 43432.2 GB/T 16826 GB/T 25917.1

Basic data

Standard ID: GB/T 25917.2-2019 (GB/T25917.2-2019)
Description (Translated English): Uniaxial fatigue testing systems -- Part 2: Dynamic calibration device (DCD) instrumentation
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N71
Classification of International Standard: 19.060; 77.040.10
Word Count Estimation: 10,185
Date of Issue: 2019-10-18
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 25917.2-2019: Uniaxial fatigue testing systems -- Part 2: Dynamic calibration device (DCD) instrumentation

---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.
Uniaxial fatigue testing systems--Part 2. Dynamic calibration device (DCD) instrumentation ICS 19.060; 77.040.10 N71 National Standards of People's Republic of China Uniaxial fatigue test system Part 2. Instruments for dynamic calibration devices Part 2. Dynamiccalibrationdevice (DCD) instrumentation [ISO 4965-2..2012, Metalicmaterials-Dynamicforcecalibrationforuniaxial fatiguetesting-Part 2. Dynamiccalibrationdevice (DCD) instrumentation, IDT) Published on October 18,.2019 2020-05-01 implementation State Administration of Market Supervision Published by China National Standardization Administration

Foreword

GB/T 25917 `` Uniaxial Fatigue Test System '' is divided into the following two parts. --- Part 1. Dynamic force calibration; --- Part 2. Instruments for dynamic calibration devices. This part is the second part of GB/T 25917. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to ISO 4965-2..2012 "Dynamic Force Calibration of Uniaxial Fatigue Tests on Metal Materials. Points. Instruments for dynamic calibration devices. The following editorial changes have been made in this section. --- In keeping with the existing standard series, the standard name was changed to `` Uniaxial Fatigue Test System Part 2. For Dynamic Calibration Devices instrument". This section is proposed by China Machinery Industry Federation. This section is under the jurisdiction of the National Testing Machine Standardization Technical Committee (SAC/TC122). Drafting organizations of this section. Kunshan Innovation Technology Testing Instrument Co., Ltd., Shenzhen Huaxue Testing Co., Ltd., Wuxi Metrology Testing Institute, Shenzhen Wantest Test Equipment Co., Ltd., China Machine Test Equipment Co., Ltd., Suzhou Dongling Vibration Test Instrument Co., Ltd. The main drafters of this section. Tao Zecheng, Liu Panchao, Zhang Shenghai, An Jianping, Yang Zhengwang, Tong Ningke, and Lu Jiachen.

Introduction

In dynamic tests, the force on the specimen may differ significantly from the expected force indicated by the test system. Act on the force sensor The inertial force and the dynamic errors of various electronic devices in the force indicating device will cause errors in the dynamic force. Inertia force equals the mass of the fixture (Between the force sensor and the specimen) multiplied by the local gravitational acceleration, and therefore also depends on. a) motion amplitude; b) exercise frequency; c) Fixture quality. The amplitude of motion is in turn determined by the applied force and the mechanical structure of the test system, including the compliance of the load chain, the specimen, the load frame and the installation basis. For sine waves, the peak and valley voltage values displayed by the dynamic calibration device are compared with the voltage values generated by the dynamic voltage reference standard. To simulate laboratory conditions, the sine wave is repeatedly calibrated with a known amount of harmonic distortion to ensure that the instrument used for the dynamic calibration device can accurately measure The same voltage peak and valley.

4 Basic requirements

4.1 Temperature The instrument for dynamic calibration should be calibrated in the temperature range of 18 ℃ ~ 28 ℃, and the actual temperature should be recorded. 4.2 Instrument for dynamic calibration device The dynamic calibration device displays and reads out the output of the dynamic calibration device. When the DC supply voltage of the dynamic calibration device (VE) is also provided by the instrument for the dynamic calibration device, and the output is mV/V at this time; when the dynamic calibration device is powered by an external power supply, The output is a simple mV value (the mV value can be converted to a mV/V value by dividing by the external supply voltage). When the dynamic calibration device loses When a sine variable is displayed (due to the dynamic force applied to the dynamic calibration device), the instrument for the dynamic calibration device will display the peak value of the output And trough. The resolution of the instrument used in the dynamic calibration device should not be greater than 0.0001mV/V (equivalent to 0.0001VEmV). 4.3 Dynamic Voltage Reference Standard A variety of DC voltage and sine voltage waveforms (specified by amplitude, frequency, and DC offset) generated by the dynamic voltage reference standard. Traceability to a voltage standard within a given uncertainty. In addition, in order to allow the performance of the instrument for dynamic calibration Enough to measure, it can make a specified amount of harmonic distortion superimposed on a sine wave. The extended uncertainty of the peak and valley voltages generated by the dynamic voltage reference standard (the confidence probability is about 95%) should not be greater than the voltage range Range (ie, peak voltage minus valley voltage). In the case of DC, the expanded uncertainty of its voltage generation (confidence probability is about 95%) should not be greater than 2VEμV (for example, for an excitation voltage of 10V, the reference standard produces a direct voltage in the range of -20mV ~ 20mV The deviation of the current voltage is 20μV. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 25917.2-2019_English be delivered?

Answer: Upon your order, we will start to translate GB/T 25917.2-2019_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 GB/T 25917.2-2019_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 25917.2-2019_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.