All ERWEKA Tablet Hardness Testers are easy to adjust by a two-point adjustment routine. Unlike some other brands of Tablet-Hardness-Testers, ERWEKA allows to select the second point of adjustment free of choice.

In addition all ERWEKA hardness testers support a linearity check (calibration) of up to 3 points within the complete measurement range.

Calibration is password protected (except TBH 125) to assure that only authorised staff adjusts the equipment.

A calibration protocol can be hard-copied (USB printer interface) when a suitable printer is connected to the units parallel printer port.



›› Static Calibration

As standard all ERWEKA Hardness Testers can be calibrated with the use of weights.

After the two-point adjustment (second value can be chosen), the linearity of the measuring range can be documented by the standard linearity check (up to 3 points, free of choice).

This means that three different weights can be placed to the calibration platform, actual and nominal results of the linearity check will be displayed and hard-copied together with the calibration protocol.



›› Dynamic Calibration

After AutoCal 2.0 is connected to the ERWEKA Tablet-Hardness-Tester the calibration routine of the unit is started and the certified load-cell is inserted into the hardness test station.

Now, automatically, the unit will adjust the internal load-cell against the certified load-cell on two values, typically 0N and approx. 300N.

When the adjustment is completed the internal load-cell will calibrate against the certified load-cell on 3 values, typically 300N, 200N and 100N. Based on this results the unit will adjust in a way that the actual/nominal deviation is minimal throughout the complete measurement range.

Via a connected printer results of calibration (actual/nominal) will be hard-copied.

The complete adjustment- and calibration routine, in combination with AutoCal 2.0, takes approx. 2 minutes and doesn't require any tools or mechanical works. You may see the complete procedure at.