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SLOPE INDICATOR <br />VW Piezometer Calibration Certificate <br />Serial #: 99525 V W P - D <br />Range : 50 psi <br />Cable Length: 400 ft <br />Date of Calibration: 5/11/2009 <br />ABC Calibration Factors <br />Part #: 52611020 <br />Cable Part # : 50613524 <br />Calibrated by: KB <br />Note: <br />A B C <br />kPa -1.043270E-4 -3.286020E-2 9.803634E+2 <br />psi -1.513135E-5 -4.765969E-3 1.421897E+2 <br />Pressure in kPa/psi = (A x Hz2) + (B x Hz) + C, where Hz is frequency in Hertz. <br />TI Calibration Factors <br />CO C1 C2 C3 C4 C5 <br />kPa 9.800381 E+2 -3.327325E-2 3.215582E-2 -1.043378E-4 3.436402E-5 -1.240651 E-3 <br />psi 1.421375E+2 -4.825707E-3 4.663643E-3 -1.513239E-5 4.983905E-6 -1.799349E-4 <br />Pressure in kPa/psi = CO + (Cl x Hz) + (C2 x T) + (C3 x Hz2) + (C4 x Hz x T) + (C5 x T2) <br />Where Hz is the frequency reading in Hertz and T is the Thermistor reading in degrees C. <br />TI factors are calculated from temperatures at 5.0, 15.0 and 25.0 degrees C. <br />Applied pressure and temperature are NIST traceable. <br />Summary of Test Results at 15°C <br />Thermistor reading is 14.2 °C. <br />Applied Pressure is referenced to 1 atm. Calculated Pressure uses ABC Calibration factors. <br />Applied Equivalent Frequency Calculated Error <br />(psi) (kPa) (Hz) (psi) (kPa) (%FS) <br />0.00 0.0 2911.9 0.01 0.1 -0.02 <br />5.00 34.5 2857.7 5.00 34.5 0.00 <br />10.00 68.9 2802.5 9.99 68.9 0.02 <br />15.00 103.4 2746.3 14.98 103.3 0.04 <br />20.00 137.9 2688.7 19.99 137.8 0.02 <br />25.00 172.4 2629.8 25.01 172.4 -0.02 <br />30.00 206.8 2569.8 30.02 207.0 -0.03 <br />35.00 241.3 2508.6 35.01 241.4 -0.02 <br />40.00 275.8 2446.0 40.00 275.8 -0.01 <br />45.00 310.3 2381.8 45.00 310.3 0.00 <br />50.00 344.7 2315.9 50.00 344.7 0.01