T/SJZJLXH 0009-2020 The calibration specifications for on-site flow measurement systems
T/SJZJLXH 0009-2020 The calibration specifications for on-site flow measurement systems
Basic Information
Scope
Main technical contents: 1. Power failure protection: In the on-site flow measurement system, the flow meters, differential pressure transmitters, pressure transmitters, and temperature transmitters can reliably preserve data such as internal parameters and accumulated flow (initial value) during power outages. 2. Sampling period: The time interval between two consecutive samples, unit: s. 3. Small signal elimination: A function set in flow meters and differential pressure transmitters in the on-site flow measurement system to overcome interference and zero drift or to ensure the normal operation of the flow system. When the signal is below a certain value, the meter processes it as zero; when it exceeds this value, the meter operates normally. 4. The on-site flow measurement system calculates the flow (energy) using mathematical models by collecting signals from flow-related sensors. The system consists of various online (or offline) flow meters (including PLCs, DCSs, flow meters, and various flow sensors and transmitters), pressure transmitters, and temperature transmitters, etc.