NM014015003

The Karl Deutsch RMG-4015 Crack Depth Meter, also known as the RMG 4015, is a portable, handheld instrument designed for the non-destructive measurement of surface-breaking crack depths in electrically conductive materials. It utilizes the AC potential drop (ACPD) method.

Here's a breakdown of its key features and functionality:

• Measurement Principle: The RMG-4015 employs the AC potential drop (ACPD) method. A probe with four spring-loaded contact pins is placed across the crack. An alternating current is introduced into the material through two outer pins, and the voltage drop across the crack is measured by the two inner pins. The instrument then calculates the crack depth based on this voltage drop. The use of AC current and the skin effect ensures the current flows near the surface, closely following the crack's contours.

• Material Compatibility: The RMG-4015 is primarily used for ferrous materials (steel, iron, austenitic steels) but can also measure crack depths in non-ferrous metals like copper, brass, and aluminum, although the measuring range and resolution may be reduced.

• Measuring Range:

  • Ferrous materials: 0 mm to 99.9 mm (0 to 3.9 inches)

  • Aluminum, copper, brass: 0 mm to 12 mm (0 to 0.5 inches)

• User-Friendly Operation: The instrument features menu-guided operation and displays the crack depth in millimeters or inches. A microprocessor monitors the measurement process to help prevent incorrect readings.

• Portability: The RMG-4015 is lightweight (225 g / 8 oz) and battery-operated, making it ideal for field use.

• Data Storage: It can store approximately 3850 measurements in up to 300 batches, with statistical evaluations (min, max, average, standard deviation) available per batch.

• Interface: An RS232C serial interface allows connection to a Karl Deutsch printer or PC for data transfer and reporting. A USB adapter is also available.

• Probe Variety: Karl Deutsch offers a range of probes for different applications, including standard probes for normal cracks and specialized probes for inclined cracks, complex surfaces, and hard-to-reach areas. Some probes for ferromagnetic materials include an external magnet.

• Calibration: The instrument supports multi-point material correction using reference notches to optimize accuracy across the measurement range.

• Applications: The RMG-4015 is used to evaluate the depth of surface cracks detected by methods like Magnetic Particle Testing (MT) or Penetrant Testing (PT), assess crack severity, determine repair needs, and monitor crack growth.