Operational records → Compositions holds laboratory samples in mol% per asset and label. A sample applies from its Valid from date until the next sample with the same label. Combustion, flaring and venting calculations use these compositions.
Add a sample
- Click New composition.
- Enter the Label (for example FUEL_GAS or FLARE_GAS), the Sample date, Valid from (blank means the sample date) and optionally Valid to.
- Enter the Components (mol%) and the Lab reference.
- Enter LHV (MJ/Sm³) and HHV (MJ/Sm³) when the laboratory report gives them. Emission factors published on a gross calorific value basis need the HHV. See Emission factors.
- Save, then attach the laboratory certificate with Evidence → Upload file.
Checks
- A sum close to 100 mol% (within the tolerance shown on the form) is normalised to 100, with warning W021.
- Outside that tolerance the sample is refused (E020).
- Unknown components or negative values are refused (E021).
Sources pick the composition by their Composition label in the source register; an event can name another label.