Proline Promass 83E/F/O Modbus RS485 Operating Instructions

Technical dataProline Promass 83 Modbus RS485Flow values (example)Turn down Flow Maximum measured error[kg/h] [lb/min] [% o.r.]250 : 1 72 2.646 2.50100 : 1 180 6.615 1.0025 : 1 720 26.46 0.2510 : 1 1800 66.15 0.102 : 1 9000 330.75 0.10Design fundamentals ä 130RepeatabilityDesign fundamentals ä 130.• Mass flow and volume flow (liquids): ±0.05% o.r.• Mass flow (gases): ±0.25% o.r.• Density (liquids): ±0.00025 g/cm 3• Temperature: ±0.25 °C ± 0.0025 · T °C; ±0.5 °F ± 0.0015 · (T - 32) °FInfluence of medium temperatureWhen there is a difference between the temperature for zero point adjustment and the processtemperature, the typical measured error of the sensor is ±0.0002% of the full scale value / °C(±0.0001% of the full scale value/°F).Influence of medium pressureThe table below shows the effect on accuracy of mass flow due to a difference between calibrationpressure and process pressure.DN[mm] [inch] [% o.r./bar]8 3/8 –0.00215 ½ –0.00625 1 –0.00540 1½ –0.00550 2 –0.005Design fundamentalsDependent on the flow:•Flow Zero point stability ÷ (Base accuracy ÷ 100)– Max. measured error: ±Base accuracy in % o.r.– Repeatability: ± ½ · Base accuracy in % o.r.• Flow < Zero point stability ÷ (Base accuracy ÷ 100)– Max. measured error: ± (Zero point stability ÷ measured value) · 100% o.r.– Repeatability: ± ½ · (Zero point stability ÷ measured value) · 100% o.r.Base accuracy forMass flow liquids 0.10Volume flow liquids 0.10Mass flow gases 0.50Page 130 • MN0M030Issue/Rev. 0.2 (12/12)