Sl. Time for Actual Differential head Differential Theoretical Coefficient No 10cm in cm. of head in cm. discharge of mercury of water Qth, cm3/s discharge rise of Cd water level (s ) t h1 h h1-h2 =hHg Calibration Table Sl. Actual No HHg in Hw in Qa in Log HHg in Log Qa discharge cm cm cm3/s HHg cm Qa =KHHgn Calculation:- Calculate actual discharge through flow meter Where a Area of measuring tank in cm2 – Height differences in piezo meter in cm – Time to collect water for a height difference of h cm, measured in – seconds And Now calculate coefficient of discharge for each run Calculations for Calibration curve The equation Qa = Cd x Qth can be written as
Sl. No Time for 10cm rise of water level (s ) Actual Differential head in cm. of mercury Differential head in cm. of water Theoretical discharge Qth, cm3/s Coefficient of discharge Cd h1 h1-h2 =hHg Calibration Table Sl. No HHg in cm Hw in cm Qa in cm3/s Log Qa Log HHg Actual discharge Qa =KHHgn HHg in cm Calculation:- Calculate actual discharge through flow meter Where a – Area of measuring tank in cm2 h – Height differences in piezo meter in cm t – Time to collect water for a height difference of h cm, measured in seconds And Now calculate coefficient of discharge for each run Calculations for Calibration curve The equation Qa = Cd x Qth can be written as