22
3.6 Error Messages
EEE
- The DISPLAY shows EEE. The upper limit of the tension range was exceeded
by more than 10%. Reduce the line tension.
OR
AUTO ZERO is no longer possible. The instrument must be Recalibrate.
- The DISPLAY shows -E.E. The lower limit of the tension range was fallen below
by more than 10%. Properly insert the process material.
OR
AUTO ZERO is no longer possible. The instrument must be Recalibrate.
3.7 Static Verification of Measuring Accuracy
All tension meters model KXE are calibrated with V-inweaved fabric tape (0.22 mm thick).
The diameters are given in Chapter 2. Any difference in process material size and rigidity
from the standard material may cause a deviation of the accuracy.
In 95% of all industrial applications, the SCHMIDT calibration has been proven to provide
the best results and is used for comparative purposes.
Requirements
:
- The ETX is factory calibrated for a horicontal material path (fig. 3.7).
- Tension meter switched on as described in Chapter 3.3.2.
- The required reference weight must be provided.
Verification procedure
:
- Interlace the ends of the tape
- Hang a weight which corresponds to the tension to be measured above a DEFLEXION
ROLLER from the measured material, vertically, as shown in fig. 3.7a.
- Thread the process material as described in Chapter 3.4. One part of the tape must run
on the left and one on the right side of the measuring roller.
- The tension value shown on the DISPLAY should be equal to the value of the suspended
weight (pay attention to the measuring units).
If this procedure shows a deviation, the instrument must be recalibrated by the
manufacturer. Therefor the instrument can be calibrated using customer supplied
samples.
MEASURING
ROLLER
PROCESS MATERIAL
WEIGHT
fig. 3.7a
side view
fig. 3.7b
rear side
DEFLEXION ROLLER
