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Petroleum Flow Computer
The 515-FP02 petroleum flow computer measures the flow and consumption of petroleum fluid. The two-channel analog flow input enables the instrument to calculate the “delta” net volume that is used by a consuming device.
Each channel has an analog temperature input that allows for volume correction to reference conditions. It is expected that the feed flow will be greater than the return flow. An exception will be raised if negative flow is detected.
The instrument can be used to measure a range of crude and refined petroleum fluids included gasoline, jet fuels, heating oils, diesels, lube oils and LPGs.
Calculations
To derive the flowrate, the analog input is normalised to a value (A) between 0 and 1:
• volume flow = (Vfmax – Vfmin) A+Vfmin
• volume = (volume flow. Δt)
The volume correction calculations are based on the ASTM D1250-04 and API Table 54 standard for the following products:
• Crude Oils
• Lube Oils
• Refined Products
• Light Hydrocarbon Liquids (LPG)
Volume correction for other fluids can be calculated by the following means:
• General Coefficient of Expansion
• Reprogrammed User Table
Features
Volume correction according to ASTM D1250-04 and ASTM-IP-API Table 54
Caters for a wide range of petroleum products including crude, lube, refined and LPG
Allows for volume correction of General and User Fluids
Allows for non-linear correction
Selection of second language and user tags
RTC logging with over 1000 entries
Infra-red communications port on front panel
Pulse width and scaling of pulse output
4-20mA retransmission
Selectable protocols on serial ports including Modbus RTU and Printer output
Front panel adjustment of 8-24V DC output voltage
Backlit Display
LCD Backup Typical plant diagram
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