Bel-2000 Gen II

Bel-2000 Gen II

The Bel-2000 is the only electronic hardness tester available on the market. It is the Industry's standard in hardness testing on wound rolls.

All Bel-2000 Units come with everything pictured, including a heavy duty flight case for storage and transport, and the Bel-2000 software that works on any Windows based operating system

The Bel-2000 is strongly recommended for hard paper rolls only, but some customers have been successful with using it on some thicker films and thicker plastics.


Bel-2000 Gen II-Theory

The Bel-2000 analyzes the digital wave-shape generated by the impulse hammer when it is tapped against a roll of wound material. The force of the impact is captured by a transducer in the Bel-2000 hammer. The force and the duration of the impact varies with the hardness of the material. When a roll of material tapped, the force signal from the hammer rises from zero to a maximum peak value and then returns to zero. The shape of that wave is used to calculate the hardness value, called RHO.

genii-theoryThe Graph shows examples of 2 different wave shapes and the hardness they indicate.

The Bel-2000 hammer produces an analog signal that is digitized by the system microprocessor using an analog-to-digital converter (ADC), The digitized wave shape is analyzed by the system to calculate a RHO value.

Special note: Users of both the Mill Assist Bel-2000 and it's predecessor, the Mill Assist RHO-METER, may see small differences in the RHO values produced by these 2 units, when measuring the same material. To avoid confusion, users should note the type of instrument when recording RHO values.

Roll Profiles

  • By measuring RHO at many places across the face of a wound roll, a PROFILE of the roll hardness can be obtained. The Profile shows the uniformity of roll hardness across the width of the roll. Ideally, a roll should show the same RHO value across it's entire width.
  • As data is collected by the Bel-2000, It shows a graph of the roll profile. The graph makes it easy to see if the profile is uniform. When the graph is flat, the profile is uniform. Profiles that are not uniform (flat) can lead to many later problems with the roll - wrinkles, stretching, or breakage. Some examples of these problems are shown in the following figures.

Technical Help

Welcome to the Tech support Page for the Bel-2000 and Rhometer.
Check out our FAQ page for questions about our units.

You may also email our BEL-2000 Department with questions not found on our FAQ page.
If you are looking for accessories, you'll find them HERE.