T/BEA 43003-2023 Active Group standards

T/BEA 43003-2023 The calibration specification for microcurrent meters with a flying-safety (fA) level of resistance

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 43003-2023

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 stipulates the metrological characteristics, calibration conditions, calibration items, calibration methods, and processing of calibration results for fA-class resistive microammeters. This specification applies to the calibration of resistive microammeters with a measurement range of 10 fA to 1 pA, a resolution of ≥1 fA, and employing the resistance-voltage method principle. Main technical content: 4. Overview 4.1 Purpose The fA-class resistive microammeters (hereinafter referred to as the calibrated instrument) are used to measure weak current signals from sensors such as radiation levels, 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 pre-signal conditioner, resistive microammeters can be divided into resistance sampling type and resistance feedback type. The principles are as follows: a) Resistance sampling type DC microammeters: As shown in Figure 1, it consists of a high-resistance sampling device, an electrostatic amplifier, and a DC voltage measurement device. b) Resistance feedback type DC microammeters: As shown in Figure 2, it consists of a high-resistance sampling device, an electrostatic amplifier, and a DC voltage measurement device. 5. Metrological characteristics 5.1 Appearance The fA-class resistive microammeters should have the following markings: instrument name, model, manufacturer's name and serial number, manufacturing date, etc. 5.2 Indication 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; Reliable grounding, no strong electromagnetic interference, and minimal electronic equipment and personnel in the laboratory. During calibration, personnel movements and activit