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-3000 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-3000 measures both SCOF and DCOF utilizing the same test platform. This is very useful in formulating accident prevention strategies for more knowledgeable risk or safety managers.
Click on image links below to view DCOF or SCOF report samples.The images show test reports using the optional
PC interface. The BOT-3000 will provide identical test result data from
the internal printer as well.
types of precision measuring instruments and devices require annual
(if not more frequent) calibration services to be performed. This is
important simply because things change. Many factors can affect the
degree of change over time. Temperature variations, moisture, shock,
vibration, mechanical stress (often by design), etc, play a role in
the output accuracy and longevity of a device. Anyone who plays a
piano, violin, or other stringed musical instrument knows that it may
require periodic tuning even if it is rarely played. Some devices
actually fare better with use rather than neglect. This is because
some components in a mechanical system are often under a degree of
preload 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 the
effects of change through periodic adjustments or calibrations. The
BOT-3000 alerts the user when it is time to return the unit to the
factory for the annual calibration and evaluation service. If the
unit is not re-calibrated by the due date, a text will appear on each
test result printout indicating an “out of calibration period”
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
Click to view summary