The modern electronics allow the user to choose
between two different measuring principles namely "Constant Speed"
and "Constant Force" with one and the same unit by selecting the required
method in the integrated programme menu using the numeric keypad.
THT1 measures hardness only (3-500 Newton, also
displayable in Kilopound or Strong Cobb) while THT2 also determines the diameter/length
of the sample (0.10 - 28mm), also displayable in inches) to document the aligment
of the sample for testing hardness. Additionnaly, the THT3 is equipped with
a manual electronic thickness measuring device, fixed and connected to the unit.
Before testing hardness and diameter/length, the sample is placed under the
thickness measuring tool and the thickness is measured (0.10 - 12.00 mm). With
the THT4, an external analytical balance (Mettler or Sartorious) is connected
to the unit. Before testing the other parameters, the sample is placed on the
blance. When the weight is stable the result is transferred to the electronic
of the THT4. The accuracy of all units is ± 1N, ±0.05mm and ±0.1mg.
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