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JJF 1757-2019 English PDF

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US$459.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1757-2019: Calibration Specification for Power Meters
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1757-2019	459	Add to Cart	4 days	Calibration Specification for Power Meters	Valid

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Basic data

Standard ID: JJF 1757-2019 (JJF1757-2019)
Description (Translated English): Calibration Specification for Power Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A56
Word Count Estimation: 22,239
Date of Issue: 2019-09-27
Date of Implementation: 2020-03-27
Issuing agency(ies): State Administration for Market Regulation

JJF 1757-2019: Calibration Specification for Power Meters

---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.
National Metrology Technical Specifications of the People's Republic of China Power Indicator Calibration Specifications Published on.2019-09-27 2020-03-27 Implementation The State Administration for Market Regulation issued Power Indicator Calibration Specifications PowerMeters Replace JJG280-1981 Responsible unit. National Radio Metrology Technical Committee Main drafting unit. China Aerospace Science and Industry Corporation Second Academy 203 Institute Participating in the drafting. China Institute of Metrology This specification is entrusted to the National Radio Metrology Technical Committee for interpretation The main drafters of this specification are. Yang Xujun (Institute 203, Second Academy, China Aerospace Science and Industry Corporation) Chen Yunmei (Institute 203, Second Academy, China Aerospace Science and Industry Corporation) Participating drafters. Liu Xinmeng (China National Institute of Metrology) Yang Lin (Institute 203, Second Academy, China Aerospace Science and Industry Corporation)

Introduction (II) 1 Scope(1) 2 Overview(1) 3 Metering characteristics (1) 3.1 Amplified power indicator metrological characteristics (1) 3.2 Bridge power indicator measurement characteristics (1) 4 Calibration conditions(2) 4.1 Environmental conditions(2) 4.2 Calibration equipment (2) 5 Calibration items and calibration methods (3) 5.1 Calibration items (3) 5.2 Appearance and working order inspection (3) 5.3 Zero Point (3) 5.4 Zero drift (3) 5.5 Power range (4) 5.6 Calibration factor (5) 5.7 Scale Linearity (6) 5.8 Calibration source output power (6) 6 Expression of calibration results (6) 7 Recalibration interval (7) Appendix A Original Record Format (8) Appendix B Calibration Certificate Inner Page Format (10) Appendix C Examples of uncertainty assessment for calibration results of major items (12)

Introduction

This specification is based on JJF 1071-2010 "Rules for Writing National Metrology and Calibration Specifications" and JJF 1059.1-2012 Compiled "Evaluation and Expression of Measurement Uncertainty". This specification replaces JJG280-1981 "M4-1 Standard Thermistor Bridge Verification Procedure" and is consistent with JJG280- The main changes compared to 1981 are as follows. --- The original name of the regulation was "M4-1 Standard Thermistor Bridge", which is now revised to "Power Indicator Calibration Regulation" Fan"; --- Added zero point, zero drift, calibration coefficient and linear calibration items, and deleted the working resistance calibration item; --- Added calibration method for amplifier power indicator, including calibration source 1mW output power, etc.; ---The power range is extended from 15μW~5mW to 3μW~100mW. Previous versions of this specification are. ---JJG280-1981 "M4-1 Standard Thermistor Bridge". Power Indicator Calibration Specifications

1 Scope

This specification applies to the calibration of 3μW~100mW (-25dBm~ 20dBm) power indicators.

2 Overview

Power indicators can be divided into two types according to their working principle. amplified type and bridge type. The power sensor (thermocouple/diode) converts the RF and microwave signals into DC or low-frequency signals. The power measurement is completed by amplification, processing and conversion. The bridge power indicator adopts the principle of Wheatstone bridge, and replaces the DC Power completes power measurement. The display modes of bridge power indicator are divided into pointer type and digital type. 3.Metering characteristics 3.1 Amplified Power Indicator Metering Characteristics a) Zero point Maximum allowable error. ±75nW. Note. The power indicator reading is after the initial zero adjustment. b) Zero drift Maximum allowable error. ±0.2%FS. Note. After the power indicator is initially zeroed and calibrated, the power indicator range remains unchanged and the indicator reading changes. c) Power range Range. 3μW~100mW (-25dBm~ 20dBm); Maximum allowable error. ±0.5% (±0.02dB). d) Calibration factor Range. 100%~85% (1.000mW~1.176mW); Maximum allowable error. ±(0.002~0.006)mW. e) Calibration source output power Power.1mW (50MHz); Maximum allowable error. ±0.75%. 3.2 Bridge power indicator measurement characteristics 3.2.1 Pointer bridge power indicator a) Power range Range. 10μW~10mW; Maximum allowable error. ±1%FS. b) Calibration coefficient Range. 88%~100% (1000mV~880mV); Maximum allowable error. ±(2~10)mV. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1757-2019_English be delivered?

Answer: Upon your order, we will start to translate JJF 1757-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1757-2019_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1757-2019_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.