T/BEA 43004-2023 Active Group standards

T/BEA 43004-2023 FAA (Flight Safety) Level Capacitive Micro-Current Meter 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 43004-2023

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 defines the metrological characteristics, calibration conditions, calibration items, calibration methods, and processing of calibration results for fA-class capacitive microammeters. This specification applies to the calibration of capacitive microammeters with a measurement range of 10 fA to 1 pA, a resolution of ≥1 fA, and a capacitance-voltage measurement principle. Main technical content: 4. Overview 4.1 Purpose The fA-class capacitive microammeters (hereinafter referred to as the calibrated instrument) are instruments used to measure weak current signals output by sensors such as radiation meters, high-resistance sensors, and vacuum gauges, with a current measurement resolution reaching the fA level. 4.2 Principle and structure According to the different working principles of the front-end signal conditioners, capacitive microammeters can be divided into capacitive sampling type and capacitive feedback type. The principle is as follows: - Capacitive sampling DC microammeters: As shown in Figure 1, they consist of a low-value capacitor sampling, an electrostatic amplifier, and a DC voltage slope measurement module. - Capacitive feedback DC microammeters: As shown in Figure 2, they consist of a low-value resistor sampling, an electrostatic amplifier, and a voltage slope measurement module. 5. Metrological characteristics 5.1 Appearance The fA-class capacitive microammeters should have the following markings: instrument name, model, manufacturer's name and factory number, manufacturing date, etc. 5.2 Indicator error 5.3 Maximum allowable error 6. Calibration conditions 6.1 Environmental conditions Environmental temperature: (20±2)°C; Relative humidity: (50±10)%; Power supply: (220±22)V, (50±1)Hz; The laboratory should have electromagnetic shielding and anti-static measures; There should be reliable grounding, no strong electromagnetic interference, and as few electronic devices and personnel as possible in the laboratory. During cal