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LEOMI-586-Primary-Signal-Calculation-Theory-merged

**The calibration table is normalized to 0u00b0C for the compensation of the thermal<br>conductivity and normalized to 0u00b0C and 1.01325bar for the mass flow calculation

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LEOMI-586-Primary-Signal-Calculation-Theory-merged

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  1. PRIMARY SIGNAL CALCULATION THEORY LEOMI-586 Principle of signal flow and calculation inside the LEOMI-586 Heat er Reference U Power PH= U × I RH = H Resistor Resistor RR H H I H Linearization Pt100 = TR Linearization Pt100 = TH Calibration curve** Output in Nm/s Error Tdiff T≠ T− T Comparison T = T−T R H + R H H + H Conductivity Compensation Pipe Volume flow Calculated in Nm³/h Dimension Density for air at norm conditions 0°C und 1.01325bar = 1.293kg/m³ Mass flow Calculated in kg/h = Volume x Density **The calibration table is normalized to 0°C for the compensation of the thermal conductivity and normalized to 0°C and 1.01325bar for the mass flow calculation.

  2. Conductivity correction 2,5 correction multiply 2,0 1,5 1,0 0,5 0,0 -200 -100 0 temperature (°C) 100 200 300 400 500 Tcon= f (t) Polynomial function T Normalization of conductivity to 0°C v =v × con tk n 0.0241 while calibration. =v×0.0241 Compensation of conductivity over the temperature inside LEOMI-586 _______ v n m T con Temperature Compensation - t - (oC) -150 -100 -50 0 20 40 60 80 100 120 140 160 180 200 250 300 350 400 in LEOMI-586 0.0241/Tcon 2.107 1.519 1.200 1.000 0.939 0.886 0.840 0.798 0.762 0.729 0.699 0.672 0.648 0.626 0.577 0.537 0.503 0.475

  3. PRIMARY SIGNAL CALCULATION THEORY LEOMI-587 Principle of signal flow and calculation inside the LEOMI-587 Heat er Reference U Power PH= U × I RH = H Resistor Resistor RR H H I H Linearization Pt100 = TR Linearization Pt100 = TH Calibration curve** Output in Nm/s Error Tdiff T≠ T− T Comparison T = T−T R H + R H H + H Conductivity Compensation Pipe Volume flow Calculated in Nm³/h Dimension Actual air Density Actual Op. Pressure (barg) Actual Op. Temp. (°C)Ex: 2 barg and 20°C = 1.298kg/m³ Actual Mass flow Calculated in kg/h = Volume x Density **The calibration table is normalized to 0°C for the compensation of the thermal conductivity and normalized to 0°C and 1.01325bar for the mass flow calculation.

  4. Conductivity correction 2,5 correction multiply 2,0 1,5 1,0 0,5 0,0 -200 -100 0 temperature (°C) 100 200 300 400 500 Tcon= f (t) Polynomial function T Normalization of conductivity to 0°C v =v × con tk n 0.0241 while calibration. =v×0.0241 Compensation of conductivity over the temperature inside LEOMI-587 _______ v n m T con Temperature Compensation - t - (oC) -150 -100 -50 0 20 40 60 80 100 120 140 160 180 200 250 300 350 400 in LEOMI-587 0.0241/Tcon 2.107 1.519 1.200 1.000 0.939 0.886 0.840 0.798 0.762 0.729 0.699 0.672 0.648 0.626 0.577 0.537 0.503 0.475

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