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Calibration Report <br /> Device under test <br /> Thickness Gauge 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 certified steel step block): 0.2 5 in/pas <br /> Calibration Data <br /> Test Nominal Step Block Measured Measurement <br /> Number Thickness Tolerance Thickness Error <br /> (inches) (inches) (inches) (inches) <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 0.500 0.000 <br /> Calibration Results <br /> The above data certifies that the Ultasound test gauge passed the <br /> manufacture's specifications for accuracy (+/- 0.004") under the specified <br /> conditions. <br /> Tested and Certified by: Gary Reeves <br /> Certified Steel Tank Institute Level 11 Sp001 #11111 <br /> Certified Ultrasound Thickness Tester Level III NDT-UT #001 <br /> ASNT-TC-1A ASNT #073128 <br /> Signature: ks Date:December 7, 2018 <br />