Terminal · Marine
Custody Transfer Metering
The meter skid at the terminal where the oil changes owner. Its reading is the number the buyer pays for, so it is built and checked to a much tighter standard than process meters.
What it does
Meters the volume loaded, with a meter paced automatic sampler for quality and water content and an air eliminator ahead of the meter. A prover checks each meter at intervals set by contract or company policy.
Basics
| Meters | Coriolis or turbine |
| Checked by | Meter prover |
| Also includes | Automatic sampler, air eliminator, temperature and pressure compensation |
Common failures
- Meter factor drifting between provings, so delivered volumes are off
Troubleshooting
- Symptom
- Meter factor changes between provings
- Likely cause
- Wear, installation effects or changed fluid properties
- What to check
- Prove the meters again and check the sampler