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6.2 Calibration procedure
Calibrations of the tension meter are performed according to the factory procedure
using weights that correspond to 10%, 50%, and 90% of the measuring range. In 95%
of all industrial applications, the factory calibration has been proven to provide the
best results. In particular, it is suitable for comparative purposes. If the material to be
measured differs significantly from the factory calibration material in material type,
diameter, rigidity, shape, etc., we recommend to perform a calibration using customer-
supplied material. In addition to the factory-preset material, you can save up to 3
additional materials.
Calibration Units and Calibration Points
The device can be calibrated in centinewton (cN) or gram (g). Although the unit of the
calibration weights has to correspond with the unit choosen in the menu calibration.
For the calibration of the tension meter, three calibration weights are used. For example,
if you select 10%, 40%, 70% for the weights for the static calibration must correspond
to 10%, 40% and 70%, for the dynamic calibration 20%, 80% und 140% of the
measuring range.
In this example, you need the following weights for the ETX-100:
Static calibration in Newton: 10 cN, 40 cN, and 70 cN
Static calibration in Gram: 10 g, 40 g, and 70 g
Dynamic calibration in Newton: 20 cN, 80 cN, and 140 cN
Dynamic calibration in Gram: 20 g, 80 g, and 140 g
NOTE:
The measured values are displayed in the unit set in the Settings menu,
independent from the unit that was used to calibrate the material characteristic. So that
they are available when you verify the calibration later or repeat the calibration after a
factory reset. For example
To perform the calibration procedure
1. Select a new material or edit an existing one (by re-entering the values) from the
material menu.
2. Enter a designation (you can use the software supplied with the tension
meter alternatively).
NOTE:
While performing the calibration, the tension meter must be fixed in such a
way that the material to be measured runs smoothly between the guide rollers and the
measuring roller.
The display gives detailed information on the calibration.
Material to be Measured Unit Calibration points
Yarn cN 5%, 50%, 90%