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JJG 74-2005 English PDF

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JJG 74-2005: Verification Regulation of Recorders for Industrial. Process Measurement
Status: Valid

JJG 74: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 74-2005	English	729	Add to Cart	5 days [Need to translate]	Verification Regulation of Recorders for Industrial. Process Measurement	Valid	JJG 74-2005
JJG 74-1992	English	479	Add to Cart	4 days [Need to translate]	Verification Regulation of Selfbalance Display Instruments	Obsolete	JJG 74-1992
JJG 74-1983	English	RFQ	ASK	3 days [Need to translate]	(Chinese Industry Standard)	Obsolete	JJG 74-1983

PDF similar to JJG 74-2005

Standard similar to JJG 74-2005

JJG 229 JJF 1187 JJF 1107 JJG 75 JJG 111 JJF 074

Basic data

Standard ID	JJG 74-2005 (JJG74-2005)
Description (Translated English)	Verification Regulation of Recorders for Industrial. Process Measurement
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A54
Classification of International Standard	17.200
Word Count Estimation	28,263
Date of Issue	2005-12-20
Date of Implementation	2006-06-20
Older Standard (superseded by this standard)	JJG 74-1992; JJG 706-1990
Quoted Standard	JJG 617; JJG 951; GB/T 3386; GB/T 3386
Summary	This standard applies with thermocouple or RTD to measure temperature. As well as the DC voltage, current, and resistance as an analog signal input, reflecting other physical, chemical quantity of industrial process measurement logger initial verification, testing and use of follow-up inspection. Industrial Process Measurement recorder (hereinafter referred to as instrumentation) include automatic potentiometer, auto balancing bridge, recorder function and indicate a combination of digital and analog hybrid recorder, paperless recorder.

JJG 74-2005: Verification Regulation of Recorders for Industrial. Process Measurement

---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 Recorders for Industrial.Process Measurement National Metrology Verification Regulations of the People's Republic Industrial process measurement recorder Released on December 12,.2005 2006-06-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 74-1992 JJG 706-1990 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on December 20,.2005, and Implemented on June 20,.2006. Focal Point. National Temperature Measurement Technical Committee Drafting unit. Shanghai Institute of Metrology and Testing Technology This regulation entrusts the National Temperature Measurement Technical Committee to explain The main drafters of this procedure. Zhu Jialiang (Shanghai Institute of Metrology and Testing Technology) Participate in the drafters. Ling Yancui (Shanghai Institute of Metrology and Testing Technology) Wu Yuyuan (Shanghai Institute of Metrology and Testing Technology)

1 Scope (1) 2 Citations (1) 3 Overview (1) 3.1 Use (1) 3.2 Classification (1) 3.3 Principles (1) 4 Metrological performance requirements (2) 4.1 Indication of basic error (2) 4.2 Recording basic errors (2) 4.3 Hysteresis (2) 4.4 Repeatability (3) 4.5 Step response time (stroke time) (3) 4.6 Set Point Error (3) 4.7 Switching difference (3) 4.8 Stability (3) 5 General technical requirements (4) 5.1 Appearance (4) 5.2 Record Quality (4) 5.3 Insulation resistance (5) 5.4 Dielectric strength (5) 6 measuring instrument control (5) 6.1 Verification conditions (5) 6.2 Verification project (7) 6.3 Verification method (7) 6.4 Processing of verification results (13) 6.5 Verification period (13) Appendix A Verification of the temperature method using a thermocouple meter calibrator and measuring terminals (14) Appendix B Technical Requirements for Setpoint Error and Switching Difference of Automatic Balanced Recorder (15) Appendix C Verification Record Format (16) Appendix D Verification certificate, verification result notice (inside page) format (19) Appendix E Example of Uncertainty Analysis (20) Appendix F Representation of the accuracy level of the digital indicator (record) (23) Industrial process measurement recorder verification procedures

1 Scope

This procedure applies to the use of thermocouples or thermal resistors to measure temperature and to modulate DC voltage, current and resistance. Quasi-electrical signal input, reflecting the first verification, subsequent verification and other industrial and physical measurement recorders of other physical and chemical quantities In-use inspection. Industrial process measurement recorder (hereinafter referred to as instrument) includes automatic potentiometer, automatic balance bridge, function record Hybrid recorders and paperless recorders combined with recorders and digital analog indicators.

2 Citations

This procedure refers to the following documents. JJG 617-1996 "Digital Temperature Indicating Regulator Calibration Procedure" JJG 951-2000 "Verification of Calibration Instructions for Temperature Indicators" GB/T 3386-1988 "Electrical and pneumatic analog recorders and indicators for industrial process measurement and control systems Can evaluate method At the time of citation, attention should be paid to the use of the currently valid version of the above cited documents.

3 Overview

3.1 Use The meter is used to indicate and record (storage) temperature, pressure, vacuum, flow, level, oxygen, carbon A measure of the amount of industrial processes such as quantities. When the sensor or transmitter converts the above measured measurement into a charge that the meter can accept After the voltage (current, resistance, and resistance), the meter can indirectly react to other related quantities by measuring the amount of electricity. with In this way, the meter can also directly measure and record the values of resistance, DC current and voltage. 3.2 Classification a) According to the structural principle. can be divided into automatic balance (such as automatic potentiometer and automatic balance bridge) and direct drive Dynamic (such as linear scale recorders and paperless recorders). b) According to the display mode. it can be divided into analog and digital. Analog indications (including pointer indications and rods, beams) Indication), analog recording (including scribing and dot recording); digital indication, digital recording. a recorder can It is a mixture of two ways. c) According to the means of recording. it can be divided into paper and paperless. d) According to the recording channel. it can be divided into single channel (single pen) and multi channel (multiple pen, dot instrument). e) According to the attached functions. it can be divided into single display and position adjustment. 3.3 Principle 3.3.1 Automatic Balanced Recorder The block diagram of the working principle of the automatic balance recorder is shown in Figure 1. It is a measurement circuit, a zero-detection amplifier, and a servo. A closed-loop control system consisting of a motor, an indicator recording mechanism, and a scribing resistor. Recorder with position control

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