Flow · Measurement
Flow Computer
An electronic unit at the meter that reads differential pressure, static pressure and temperature, or meter pulses, and calculates corrected volumes.
What it does
Applies the measurement standard and gas compressibility to give volumes at base conditions, keeps hourly and daily records with an audit trail, and passes them to SCADA.
Basics
| Inputs | DP, pressure, temperature or pulses |
| Calculates | Corrected volume and energy |
| Compressibility | AGA Report No. 8 methods |
| Records | Hourly and daily logs, alarms, audit trail |
Common failures
- Wrong plate size or gas analysis entered, every volume is off
- Clock or battery failure that leaves gaps in the records
Troubleshooting
- Symptom
- Volumes jump after a plate change
- Likely cause
- Plate size not updated in the configuration
- What to check
- Match the configuration to the installed plate and document the change