Take measurements and perform calculations of product in jetty operations

Business Sectors (Suites): Jetty Operations
Developed by: Cogent
Approved on: 30 Mar 2020


This standard covers the competences you need to take measurements and perform calculations in jetty operations in accordance with approved procedures and practices.

You will be required to demonstrate that you can:
1 Take measurements and perform calculations of product

During this work you must take account of the relevant operational requirements and safe working practices AS THEY APPLY TO YOU.

The activity is likely to be undertaken by someone in petro-chemical work setting, including individuals working in refineries, chemical plants and tank storage.

Performance criteria

You must be able to:

P1 ensure that the measurement equipment is fit for purpose before and after use
P2 obtain and use the correct PPE
P3 maintain the integrity of the product and environmental conditions throughout
P4 take and record measurements
P5 reinstate source conditions
P6 perform all calculations and investigate any unexpected results
P7 complete all relevant documentation
P8 deal promptly and effectively with problems that are your responsibility, and report those that you cannot solve and or are not your responsibility to the relevant person
P9 work safely in accordance with operational and environmental requirements

Knowledge and Understanding

You need to know and understand:

​K1 how to ensure that the measurement equipment is fit for purpose both before and after measurement
K2 how to perform the relevant calculations
K3 how to recognise and deal with unexpected results


​1 Take measurements and perform calculations using direct and meter measurement. Physical quantities may include:
1.1 product quantities
1.2 pressure
1.3 ullage
1.4 product density
1.5 product temperature
1.6 vapour space content

2 Context of measurements may include:
2.1 between transfers
2.2 during transfers (receipt of product at tank)
2.3 for stock records
2.4 for client or other agency (for HMC&E records)

Scope Performance

Scope Knowledge





Links To Other NOS

External Links

Version Number


Indicative Review Date

30 Mar 2026





Originating Organisation


Original URN


Relevant Occupations

Engineering, Engineering and Manufacturing Technologies, Engineering Professionals, Professional Occupations

SOC Code



take measurements, perform, calculations, product, jetty, operations