Steam fiscal measurement using an ISO 5167 or V-Cone differential pressure element needs mass flow and energy worked out correctly across water, saturated steam, and superheated steam. The Contrec 515 SC04 Steam Flow Computer is built for this, with built-in profiles for 9 ISO 5167 primary element types (orifice plates, nozzles, venturi tubes) plus 2 V-Cone categories.
Stacked DP inputs extend the operating range without losing precision at low flow, and mass flow and energy are calculated per the IAPWS-IF97 Industrial Formulation, with dedicated logic for water, saturated steam, and superheated steam. This suits complex thermal utility loops where the fiscal numbers need to be defensible.
In actual application, this unit usually sits out on process plant rather than in a control room, so it comes in a weatherproof IP65 housing built for steam utility environments.
Before we quote this, we would normally check your DP element type and calibration standard, your steam pressure and temperature, and whether you are measuring saturated or superheated steam.
Hope this helps.
