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.
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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.
Still have questions about your setup? Talk to an engineer or call (210) 405-4248.