T/BEA 43005-2023 Active Group standards

T/BEA 43005-2023 Fluency (fA) Level Resistive Micro-Current Source Calibration Specification

Publish Date: 2023-05-08 Implement Date: 2023-06-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/BEA 43005-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: The measurement of electrical and magnetic quantities

Publish Date: 2023-05-08

Implement Date: 2023-06-01

Scope

Scope: This specification prescribes the metrological characteristics, calibration conditions, calibration items, calibration methods, and processing of calibration results for fA-grade resistive microcurrent sources. This specification applies to the calibration of DC microcurrent sources with a range of ±(10-12A to 10-14A) and a maximum allowable error of ±(0.01% to 2%), including constant-voltage resistive and constant-current resistive types. Main technical content: 3.1 Definition of terms 3.2 Maximum compliance voltage: The maximum output voltage range of the calibrated source that meets the corresponding technical requirements. The unit is volt (V). 4.1 Purpose The fA-grade resistive microcurrent source (hereinafter referred to as the calibrated source) is used for calibrating various DC low-current meters, electrostatic meters, etc. 4.2 Principle and structure DC microcurrent sources are divided into constant-voltage resistive and constant-current resistive types according to their working principles. The principle is as follows: a) Constant-voltage resistive DC microcurrent sources, also known as V/R sources. As shown in Figure 1, the constant-voltage resistive DC microcurrent source consists of a programmable voltage source Un and a high-value resistor Rs connected in series. By changing the standard high-value resistor Rs to adjust the measurement range and adjusting the output voltage Un of the programmable voltage source to regulate the output current value In. b) Constant-current resistive DC microcurrent sources: As shown in Figure 3, they consist of an adjustable standard voltage source Un and a standard high-value resistor Rs connected in series to form a DC microcurrent output circuit. Through feedback loops and differential amplification, the voltage drop of the output current on the load is equal to the output voltage of the programmable voltage source, achieving constant-current output and eliminating the influence of the output load (resista