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Device under test: Calibration Report <br /> Thickness Gage Model: EHC-09DL-CW S/N: 05053577 <br /> Software Version: V3.5 <br /> Items used for calibration <br /> Transducer Model: DKS-537 <br /> Transducer S/N: 88854 <br /> Step Block Model/Description: 0.100" to 0.500" Steel Block <br /> Velocity (through step block): 0.2359in/us <br /> Calibration Data <br /> Test Nominal Step block Measured Measurement <br /> No. Thickness Tolerance Thickness Error <br /> (Inches) (in) (in) (in) <br /> 1 0.100 ±0.001 0.100 0.000 <br /> 2 0.200 ±0.001 0.200 0.000 <br /> 3 0.300 ±0.001 0.300 0.000 <br /> 4 0.400 ±0.001 0.400 0.000 <br /> 5 0.500 ±0.001 I 0.501 0.001 <br /> Calibration Results <br /> The above data certifies that the gauge passed the manufacturer's specification for <br /> accuracy (+/- 0.004") under the specified conditions. <br /> Tested and Certified by: Gary Reeves <br /> Certified Steel Tank institute Level II Sp001 # 11111 <br /> Certified Ultrasonic Thickness Tester Level II (UTT) SNT-TC-1 A # 0001 <br /> Signature: Date: October 10, 2012 <br />