NM01CBMABR

This is a compact and portable calibration block, often referred to as a "Rompas" block or Miniature Angle Beam (MAB) block, manufactured by Curtis Industries. It is constructed from Carbon Steel 1018, a common material used for calibration standards due to its well-defined acoustic properties. The block is specifically designed for calibrating angle beam transducers used in shear wave ultrasonic testing. It is supplied with a protective case for storage and transport.

Key Features:

• Miniature Angle Beam (MAB) / Rompas Design: This design serves as a substitute for the DSC (Distance Sensitivity Calibration) block and is widely used for several calibration functions.

• Material: Manufactured from Carbon Steel 1018, ensuring consistent acoustic properties relevant to testing on similar steel materials.

• Calibration Purposes: Primarily used for:

  • Shear Wave Distance Calibration: Establishing the time base or distance settings on the ultrasonic instrument for shear wave inspections.

  • Beam Index Verification: Confirming the actual exit point (beam index) of the sound beam from the angle beam transducer.

  • Refracted Angle Verification: Checking the actual refracted angle of the sound beam within the test material.

  • Sensitivity Calibration: Setting or verifying the sensitivity levels of the ultrasonic testing system for angle beam inspections.

• Specific Geometries: The block typically incorporates specific radii and a flat-bottom hole (FBH) at a defined metal travel distance to achieve these calibration points. Common features include a 1.0" radius opposite a 2.0" radius and a 5/64" diameter FBH at a specific depth (often 0.750" deep for a 1.000" thick block). Note: Dimensions can vary slightly depending on the exact Curtis model.

• Portable Size: The "miniature" designation indicates a compact size, making it convenient for field use. A common thickness is 1.000" (also available in 0.500").

• Protective Case: Supplied with a case, typically made of wood or a durable plastic, to protect the calibration block from damage during storage and transportation, maintaining its accuracy and integrity.

• Curtis Manufacturing: Manufactured by Curtis Industries, a reputable supplier of NDT calibration standards, ensuring quality and adherence to relevant specifications (often referencing ASTM E164 and U.S. Bureau of Public Roads Type B specifications).

Applications:

• Calibration of angle beam transducers for shear wave inspection in various industries.

• Field calibration and verification of ultrasonic testing equipment.

• Used in conjunction with procedures and standards that require angle beam calibration using a miniature angle beam or Rompas-type block.

Importance:

• Ensures accurate and reliable results during angle beam ultrasonic testing.

• Allows for proper setup and verification of the ultrasonic equipment's distance, angle, and sensitivity settings.

• Facilitates compliance with industry standards and inspection procedures.