Early tribometer designs from Leonardo da Vinci
Modern industrial tribometers such as the CETR UMT-3 (shown) can perform practically all common tribological tests, with many different materials, and under a large variety of controlled environmental conditions and lubricants. This type of laboratory tribometer would not be ideal for everyday field testing.
Calculating the coefficient of friction, or COF is simply dividing the amount of force it takes to move an object (F) by the Normal force (N) which is basically the overall weight of an object. So if it requires one pound of force to push or pull a two pound object; you have a COF of 0.5
The BOT-3000E can perform both SCOF and DCOF test types, wet or dry; with a variety of sensor (test foot) materials.
Both SCOF and DCOF are valuable indicators of the available friction of a walkway surface. You need an adequate SCOF level to help “grab” the floor surface as you step, but a good DCOF level helps prevent a small slip event from becoming a more dangerous slide event, which can result in a fall. Unlike other devices, the BOT-3000E measures both SCOF and DCOF utilizing the same test platform. This is very useful in formulating accident prevention strategies for the risk or safety manager.
Varioustypes of precision measuring instruments and devices require annual(if not more frequent) calibration services to be performed. This isimportant simply because things change. Many factors can affect thedegree of change over time. Temperature variations, moisture, shock,vibration, mechanical stress (often by design), etc, play a role inthe output accuracy and longevity of a device. Anyone who plays apiano, violin, or other stringed musical instrument knows that it mayrequire periodic tuning even if it is rarely played. Some devicesactually fare better with use rather than neglect. This is becausesome components in a mechanical system are often under a degree ofpreload condition and are potentially subject to developing the“mechanical memory” effect. This occurs at a molecular level.Many precision measurement instruments are designed to overcome theeffects of change through periodic adjustments or calibrations. TheBOT-3000E alerts the user when it is time to return the unit to thefactory for the annual calibration and evaluation service. If theunit is not re-calibrated by the due date, a text will appear on eachtest result printout indicating an “out of calibration period”status.
DCOF results with Tek Stil high traction ESD vinyl flooring
DCOF results with common smooth ceramic tile
SCOF results with common smooth ceramic tile
SCOF results with Tek Stil high traction ESD vinyl flooring
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