AGA-9 Ultrasonic Meter Configuration on ABB Totalflow
Key Takeaway
How to configure AGA-9 ultrasonic meter measurement on ABB Totalflow — Modbus integration with meter electronics, diagnostic data, and custody transfer compliance.
Quick Answer
AGA-9 ultrasonic meters communicate with Totalflow via Modbus RTU over RS-485. The ultrasonic meter electronics transmit velocity, flow rate, and diagnostic data to the Totalflow, which applies gas composition and base condition corrections to compute standard volume.
Integration
- Connect ultrasonic meter to Totalflow via RS-485
- Configure Modbus master on Totalflow to poll meter registers
- Map velocity, flow rate, speed of sound, and diagnostics
- Create AGA-9 application in PCCU32
- Configure pressure, temperature, and gas composition inputs
- Enable diagnostic alarming (SOS deviation, path performance, AGC)
Diagnostics
AGA-9 requires continuous monitoring of speed of sound consistency, path performance ratios, AGC levels, and signal quality. These detect meter degradation before it affects billing accuracy.
Frequently Asked Questions
Via Modbus RTU over RS-485. The meter electronics transmit velocities, flow rates, and diagnostics to the Totalflow for AGA-9 calculation.
Diagnostics detect meter degradation and measurement errors before they affect billing accuracy — critical for custody transfer.