9-2 Issue 05, 01/01 Krautkramer DM4E / DM4 / DM4 DL
Principle of operation Ultrasonic pulse echo method with T/R probes
Gain Automatic or manual; HI, MED or LOW (adjustable)
Zero adjustment Automatic; manual with 2-point calibration
Calibration 1-point calibration with set sound velocity, 2-point calibration, manually using the
calibration block (with 2 thicknesses) from the same material and with the same
sound velocity as the material to be tested
V-path correction Automatic
Measurement range standard operation: 0.6 mm - 500 mm / 0.025 inch - 20.0 inch (in steel), depending
on the probe, material and surface
DUAL MULTI operation: 2 mm - 25 mm (in steel), depending on the probe, material
and surface
Display resolution selectable for thicknesses up to 99.99 mm (9.999 inch):
0.01 mm or 0.1 mm (0.001 inch or 0.01 inch)
> 100.0 mm (10 inch): 0.1 mm (0.01 inch)
Units of measure Selectable: mm or inch
Sound velocity range 1000 - 9999 m/s (resolution 1 m/sec) / 39,000 - 393,700 inch/sec
Display 4 digit LCD with switchable backlight; digit height: 12.7 mm / 5 inch
Display frequency > 4 Hz
Measurement frequency 25 Hz in the MIN mode; 4 Hz in the THK mode
Specifications
9-2 Issue 05, 01/01 Krautkramer DM4E / DM4 / DM4 DL
Principle of operation Ultrasonic pulse echo method with T/R probes
Gain Automatic or manual; HI, MED or LOW (adjustable)
Zero adjustment Automatic; manual with 2-point calibration
Calibration 1-point calibration with set sound velocity, 2-point calibration, manually using the
calibration block (with 2 thicknesses) from the same material and with the same
sound velocity as the material to be tested
V-path correction Automatic
Measurement range standard operation: 0.6 mm - 500 mm / 0.025 inch - 20.0 inch (in steel), depending
on the probe, material and surface
DUAL MULTI operation: 2 mm - 25 mm (in steel), depending on the probe, material
and surface
Display resolution selectable for thicknesses up to 99.99 mm (9.999 inch):
0.01 mm or 0.1 mm (0.001 inch or 0.01 inch)
> 100.0 mm (10 inch): 0.1 mm (0.01 inch)
Units of measure Selectable: mm or inch
Sound velocity range 1000 - 9999 m/s (resolution 1 m/sec) / 39,000 - 393,700 inch/sec
Display 4 digit LCD with switchable backlight; digit height: 12.7 mm / 5 inch
Display frequency > 4 Hz
Measurement frequency 25 Hz in the MIN mode; 4 Hz in the THK mode
Specifications
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