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4 <br />Calibrationf <br />Resort <br />Device under test: <br />Thickness Gage Model: EHC-09DL-CW S/N: 05053577 <br />Software Version: V3.5 <br />Items used for calibration <br />Transducer Model: DK -537 EE <br />Transducer S/N: 66723 <br />Certified Step Block Model/Description: 0.100" to 0.500" Steel Block <br />Serial Number: A27830 <br />Velocity (through step block): 0.2359in/us <br />Calibration Data <br />Test <br />No. <br />Nominal <br />Thickness <br />(Inches) <br />Step block <br />Tolerance <br />in <br />Measured <br />Thickness <br />(in) <br />Measurement <br />Error <br />(in) <br />1 <br />0.100 <br />±0.001 <br />0.100 <br />0.000 <br />2 <br />0.200 <br />±0.001 <br />0.200 <br />0.000 <br />3 <br />0.300 <br />±0.001 <br />0.300 <br />0.000 <br />4 <br />0.400 <br />±0.001 <br />0.400 <br />0.000 <br />5 <br />0.500 <br />±0.001 <br />0.500 <br />0.000 <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 III (UTT) NDT-UT # 0001 <br />Signature: - eS Date: May 5, 2015 <br />