27
fig. 3.6.2
Guide roller
Guide roller
Measuring
Roller
Material to
be measured
Weight
3.6.2 Verifying the calibration
When verifying the calibration, make sure to select the same material, calibration
position and calibration points as used for creating the associated material characteristic.
Otherwise, the precision of the measurements will not be sufficient.
The tension meter has been calibrated on material 1 and material 2 according our
SCHMIDT procedure for a vertical material path and cannot be deleted or overwritten.
The diameters and materials are given in chapter 2. Calibrations of the tension meter are
performed according to the SCHMIDT factory procedure using weights that correspond
to 10 %, 50 % and 90 % of the measuring range.
Do not let the thumbpiece snap back as this could affect the calibration and
damage the instrument.
- Before verifying the calibration, move the instrument slowly up and down to compen-
sate for any mechanical friction losses and thus ensure repeatability of the measure-
ments.
- The tension value shown on the display should be equal to the mass of the suspended
weight.
If the verification of the calibration shows a deviation beyond the allowable tolerance
so that reliable operation is no longer possible, the instrument needs to be re-calibrated
or returned to the factory for repair.
- Attach a weight vertically to the material to be measured that corresponds to the
tension to be measured (make sure to select the correct unit). The weight must
hang freely. (Always use a fresh portion of the material to be measured.)
- Insert the material as described in chapter 3.5.3.
