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DynaPOCKET

DynaPOCKET Hardness Testing

The DynaPOCKET is a small, integrated digital hardness tester which operates according to the dynamic rebound method (standardized according to ASTM A956 and DIN 50156). The compact design allows easy on-site hardness testing on solid, non-transportable components and even on positions difficult to access by other hardness testers. Quick and reproducible measurements can be made independent of impact direction due to a patented signal processing.

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Features

Compact Setup

The DynaPOCKET integrates the impact device and display or evaluation unit into one instrument. This means: small dimensions, low weight, no cables. As a result, you’ll have an extremely compact hardness tester at your disposal which really fits into any pocket, and goes with you everywhere without any problem.

No matter which test location, which test position, and which test direction you wish to work in, the DynaPOCKET is the right instrument.

Easy Operation

Needless to say, we have ensured easy and straightforward operation: All functions can be activated in the DynaPOCKET with just two keys.

The DynaPOCKET makes hardness testing fast and easy as never before: switching on, measuring, and reading - in a matter of seconds! The hardness value is immediately digitally displayed on the large and easy-to-read LCD display.

Rebound Method

The DynaPOCKET operates according to the rebound method in which an impact body is impelled against the test surface by spring force. Impact and rebound velocities are each measured in non-contact mode; the hardness value is calculated on the basis of these two readings. The harder the material, the higher the rebound velocity and the displayed hardness value. The rebound method offers measurement with high precision and reproducibility, and consequently an especially high test reliability.

Patent Technology

Now, that’s what we call easy testing: when using the DynaPOCKET, you’ll measure immediately, everywhere, in any direction – and all this with constant accuracy. This is ensured by our patented signal processing which spares you the trouble of having to input additional correction factors for the impact direction, no matter if you’remeasuring in horizontal or overhead positions.

Ease of Use

We even make the calibration of the DynaPOCKET easy for you: Standard conversion tables for nine material groups are stored in the instrument from which you can choose the one that suits your application. You’ll easily recognize the material groups by the alphanumerical abbreviations displayed by the instrument (e.g. St for low-alloy/unalloyed steel and cast steel, GCI for gray cast iron, Cu for wrought copper alloys, etc.).

The measurement itself is child’s play, and the measured hardness value is directly displayed. Of course you can decide for yourself whether you wish to see the single reading or the arithmetical mean or average value of a complete measurement set.

It goes without saying that the DynaPOCKET makes various hardness scales available for you to choose from. A conversion is possible to the following scales:

  • HL Leeb
  • HS Shore
  • HB Brinell
  • HRB Rockwell B
  • HRC Rockwell C
  • HV Vickers
  • N/mm² Tensile strength

The DynaPOCKET is also able to make conversions according to the standard specifications DIN 50150 and ASTM E 140, provided the material group in question is lowalloy/ unalloyed steel and cast steel. The instrument-specific conversion tables apply to the other materials.

Key Featurees & Benefits

  • Easy on-site hardness testing on solid, non-transportable components and even on positions difficult to access
  • Operation based on the Rebound (Leeb) Principle with special signal processing technique. The instrument senses the test direction and automatically compensates for gravitational effects.
  • Easily and clearly arranged operation via two keys
  • Hardness measurement independent of impact direction
  • Display of the single or average value
  • Standard conversion tables stored for nine material groups
  • Conversion of the hardness value for hardness scales HL, HV, HB, HS HRB, HRC and N/mm2
  • Measurement ranges (material dependent) 150 to 1000 HL, 75 to 1000 HV, 75 to 700 HB, 30 to 100 HS, 35 to 100 HRB, 20 to 70 HRC, 250 to 2200 N/mm2
  • Measurement accuracy (standard deviation) ± 4 HL or 0,5 % at 800 HL (average value of 5 measurements related to the average value of the hardness reference block)
  • Operates on s tandard batteries (2 x AAA)

Digitally displayed hardness value

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You can directly read the measured hardness value on the large LCD display. At the same time, the selected hardness scale (in this case HL) and the option Average x is displayed. The battery icon informs you about the current battery charge condition.

In the setup or configuration mode, you can select different settings, in this case e.g. the required hardness scale (SCAL), or a material group (MAt).Other setting options: Single/Average, conversion according to DIN 50150, ASTM E 140, or instrument-specific conversion.

Applications

The DynaPOCKET is suitable for solid workpieces made of steel or cast materials. The following are typical applications:

  • Large coarse-grain components with surfaces as rolled
  • Forgings with inhomogeneous surface structures
  • Workpieces made of cast materials of all types
  • hardness testing of large series products during the production.

Specifications

Test method Rebound hardness testing according to ASTM standard specification A 956; dynamic measuring method; ratio of rebound (Rp) and impact (Ip) velocities with output of hardness in Leeb’s hardness value HL = 1000 Rp/Ip
Setup Miniaturized processor-controlled rebound hardness tester; impact device and integrated electronics
Integrated Impact Device Dyna D (tungsten carbide spherical test tip); impact energy approx. 12 N/mm², diameter of spherical test tip 3 mm / 0.1“
Materials Tested Forged, rolled and cast materials
Stored Material Groups Low-alloy/unalloyed steel and cast steel; tool steel; corrosion-resistant steel; gray cast iron; nodular graphite iron; aluminum cast alloys; brass; bronze; wrought copper alloys
Measuring Range Depending on the material group, e.g for low-alloy steel: 150-1000 HL; 75-1000 HV; 75-700 HB; 35-100 HRB; 20-70 HRC; 30-100 HS; 250-2200 N/ mm²; 9 fixed material groups stored in the instrument
Display LCD, 4-digit display of the hardness value and status symbols
Conversion Scales and Resolution HL (1.0); HV (1.0); HB (1.0); HS (0.1);
HRC (0.1); HRB (0.1); N/mm² (5.0)
Conversion According to DIN 50150, ASTM E 140, instrument-specific conversion (Dyna)
Statistics Display of average value
Automatic Instrument Switchoff After 3 min. of non-use in the average mode
Keypad Membrane keypad with 2 keys
Power Supply Battery operation (2 x AAA cells, NiCd, NiMH or AlMn)
Operating Time >4000 measurements depending on battery type
Battery Charge Indication LowBatt indicator, instrument switchoff with low voltage
Operating Environment Operation: -10°C to +50°C (14°F to 122°F)
Storage: -20°C to +70°C (-4°F to +158°F)
Lower temperatures according to individual tests
Weight ~200 g (0.4 lb)
Dimensions 38 D x 170 L mm (1.5" D x 6.7" L)
Test Attachments For better positioning with curved surfaces; for spherical, hollow spherical, cylindrical and hollow cylindrical surfaces (Dyna 41 and Dyna 42)
Other accessories Transport case, cleaning brush, hardness reference block MIC D62, hardness reference block MPAcertified, grinding set for surface treatment, exchange impact bodies.

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