EQUIPMENT CALIBRATION METHODS | PROCESS & CONTROL SYSTEMS
Scope
This Guideline identifies the allowable methods of calibration for
meters and meter accessories.
Frequency
As listed
Procedure
| Measurement Equipment |
Primary Method | Secondary Method |
| Meters – Loading and Unloading racks |
Small volume prover (SVP) |
Pipe prover or tank prover may be used if SVP is not available |
| Meters – dispensers and refulelers |
Small volume prover | Master meter |
| Meters – pipelines | Pipe prover | |
| Meters – marine | Pipe prover | |
| Pressure transmitter/ indicator |
Dead weight tester | Hand held calibrator and precision pressure calibrator |
| Temperature transmitter |
Thermal calibrator for RTD (decade box) |
|
| Temperature Indicator |
Comparison against ASTM thermometer |
|
| Glass thermometer | ASTM certified thermometer |
|
| Hydrometer | ASTM certified thermometer |
OPERATION RECORDS AND DOCUMENT RETENTION
Scope
This Guideline specifies the required record retention period for calibration and
verification of measurement equipment that shall be used.
Frequency As listed
Procedure
| Measurement Equipment |
Minimum Record Retention Period |
Notes |
| Temperature and pressure transmitters, readouts |
2 years | Includes PET and glass thermometers |
| Densitometers and hydrometers |
2 years | |
| Provers (calibration) | All records | Meter provers include pipe prover, small volume prover, tank provers and master meter. |
| Standard calibrations | 2 years | Include all Instrument equipment certificates |
| Meter calibration curves |
All records | Plant should have current certificate as a hard copy on-site and previous certificates as an e-copy |
| Meter proving records |
2 years | Through e-copy |
| Transfer records documentation |
2 years | |
| Valve integrity checks |
2 years | |
| Sampling and sampler certification records |
All records | Water Injection test must be available on-site as a hardcopy and previous certificates as an e-copy. |
EQUIPMENT CALIBRATION FREQUENCY
Scope
This Guideline identifies the frequency of calibrations and inspections
of measurement equipment that will be considered acceptable
performance. Measurement equipment or systems shall be certified
as to accuracy at time of purchase and calibrated anytime accuracy is
in doubt.
Frequency As listed
Procedure
| Category | Measurement Equipment |
Minimum Frequency |
| Calibration Equipment |
All | 1 year
Note: All calibration equipment |
| Laboratory Equipment |
All | Annually |
| Instrument Loops |
Temperature Loops Pressure Loops Quarterly |
Quarterly |
| Flow Computers
|
Configuration parameter
Printers |
Quarterly
Note: Verify meter curves, base Quarterly Maintenance |
| Pressure and Differential Pressure
|
Strainer D.P. Switch
Fast Loop |
Yearly Calibration
Yearly Calibration |
| Thermometer and Pressure Gauges
|
Pressure Gauges
Reference Thermometers Certified Thermometers Thermometers (Electronic) |
Quarterly
Yearly Monthly Note: Temperature Devices used |
| Sampling Systems
|
Sample probe
Water Injection Testing. Sampler weigh scale |
Performance
Note: Inspection as needed or Commissioning and Performance. Note: Water injection test must be Quarterly |
| Meters
|
Maintenance
Proving |
Turbine Meters Note: According to Performance PD Meters Note: According to Performance Master Meter: Yearly Batch Marine or Marine Cargo: Batch Single Hydrocarbon Pipeline : Monthly Marine Vessel Fueling :Yearly Truck Loading/ Unloading : Every 4 months Aircraft refueling, defueling and dispensing : Every 4 months |
| Provers
|
Pipe Prover (Water Draw)
Pipe Prover (Master Meter) Pipe Prover Switches Pipe Prover Spheres Pipe Prover Cleaning Small Volume Prover (Water Draw) Tank Prover (Water Draw) Master Meter |
Every 5 years
Every 3 years Note: According to Performance. Every 3 years. Every 3 years Yearly |