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JJG 2075-2024 English PDF

US$259.00 · In stock
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JJG 2075-2024: Measuring Instruments for Capacitance
Status: Valid

JJG 2075: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 2075-2024	English	259	Add to Cart	3 days [Need to translate]	Measuring Instruments for Capacitance	Valid	JJG 2075-2024
JJG 2075-1990	English	199	Add to Cart	2 days [Need to translate]	Verification Scheme of Capacitance Measuring Instruments	Obsolete	JJG 2075-1990

Basic data

Standard ID	JJG 2075-2024 (JJG2075-2024)
Description (Translated English)	Measuring Instruments for Capacitance
Sector / Industry	Metrology & Measurement Industry Standard
Word Count Estimation	12,123
Date of Issue	2024-02-07
Date of Implementation	2024-08-07
Issuing agency(ies)	State Administration for Market Regulation

JJG 2075-2024: Measuring Instruments for Capacitance

---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.
Table of National Metrology Verification System of the People's Republic of China Capacitance measuring instruments Released on 2024-02-07 2024-08-07 Implementation The State Administration for Market Regulation issued Capacitance measuring instrument verification system table Replace JJG 2075-1990 Responsible unit. National Electromagnetic Metrology Technical Committee Drafting unit. China Institute of Metrology This verification system table is entrusted to the National Electromagnetic Metrology Technical Committee for interpretation. Drafted by. Huang Lu (China Institute of Metrology) Yang Yan (China Institute of Metrology) Dai Dongxue (China National Institute of Metrology)

Introduction (II) 1 Scope(1) 2 Measurement standards (1) 2.1 Overview(1) 2.2 Composition of measurement standards (1) 2.3 Parameters of the metrology benchmark (1) 2.4 Delivery method (1) 3 Measurement standards (1) 3.1 Overview(1) 3.2 Capacitor operating standards (1) 3.3 Standard capacitors (2) 3.4 Standard capacitance bridge (3) 4 Working measuring instruments (4) 4.1 Capacitors and capacitor boxes (4) 4.2 Capacitor bridge (5) 5 Block diagram of capacitance measuring instrument calibration system (5)

Introduction

This verification system table is compiled in accordance with JJF1104-2003 "Rules for Compilation of National Metrology Verification System Tables". This verification system table replaces JJG 2075-1990 "Capacitance Measuring Instruments", and the main technical changes are as follows. ---The capacitance standard is updated from a horizontal static type calculation capacitance device to a vertical movable shield type calculation capacitance device, The relative expanded uncertainty range of the capacitance unit Farad is (2.0×10-8~4.0×10-8) (k= 2) The value of the reappearing capacitor increased by 0.4pF and 100pF; --- The capacitance sub-standard is cancelled and a transition standard capacitor (group) is added to the capacitance standard; ---The capacitor working standards are increased by 100fF, 10nF, 100nF and 1F; --- Extend the frequency range of capacitance measurement standards and working measuring instruments to 10MHz; --- The capacitance measurement standard has reclassified the accuracy level; --- The value of the coverage factor k of the uncertainty statement is uniformly changed to 2. The previous versions of this verification system table are as follows. ---JJG 2075-1990. Capacitance measuring instrument verification system table

1 Scope

This calibration system is suitable for capacitance measurement with capacitance range of 0.1fF~1F and frequency range of 20Hz~10MHz Transfer of value of instruments. This calibration system table specifies the basic metrological parameters of the capacitance reference and the conversion of the capacitance value from the capacitance reference to the meter. The transfer relationship from measurement standards to working measuring instruments, the method of value transfer and the measurement capability during value transfer.

2 Measurement basis

2.1 Overview The capacitance benchmark is used to reproduce the capacitance unit value in my country. The unit of capacitance is Farad (F). 2.2 Composition of measurement benchmarks The capacitance standard consists of a vertical movable shield type calculation capacitor, a laser interferometer length measurement system, and a transition standard capacitor (group) And standard capacitance bridge. 2.3 Parameters of the metrology benchmark The capacitance benchmark reproduces the capacitance values of 0.4pF, 1pF, 10pF and 100pF, and the frequency is 1kHz, 1.592kHz, relative expanded uncertainty range is (2.0×10-8~4.0×10-8)(k=2). Transition standard voltage The annual stability index of the container (group) is ±2×10-7. 2.4 Delivery Method The capacitance standard is based on the principle of calculated capacitance and uses laser interferometry to measure the length of the length unit traceable to the International System of Units. The meter uses a transition standard capacitor (group) and a standard capacitance bridge, and uses the capacitance comparison method to compare the lower level measurement standard. Value transfer.

3 Measurement standards

3.1 Overview Capacitance measurement standards are divided into capacitance working standards, standard capacitors and standard capacitance bridges (including LCR meters Standard capacitors and standard capacitance bridges are classified into grades or classes to determine their accuracy. 3.2 Capacitor working standard 3.2.1 The capacitance working standard consists of a standard capacitor and a standard capacitance bridge. The nominal value of the standard capacitor is 100fF, 1pF, 10pF, 100pF, 1nF, 10nF, 100nF, and 1μF. 3.2.2 Annual stability range of standard capacitors with nominal values of 1pF, 10pF and 100pF at 1kHz It is ±(2×10-7~3×10-7), and the relative expanded uncertainty range is (2×10-7~7×10-7) (k=2). 3.2.3 Standards with Nominal Values of 100fF, 1pF, 10pF, 100pF, 1nF, 10nF, 100nF, and 1μF The frequency characteristics of capacitors can be measured by network analysis or resonance method at frequencies of 20Hz~10MHz. The capacitance value is obtained by frequency correction based on the actual capacitance value at 1kHz. Its annual stability range is ±(2×10-6~ 3×10-3), the relative expanded uncertainty range is (1×10-6~3×10-3)(k=2).

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Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 2075-2024 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.