14
3.6.1 Static Calibration of the ZE
(Cont.)
1st calibration point
:
- Hang a WEIGHT which corresponds to 10% of the tension range from the PROCESS
MATERIAL, vertically, as shown in fig. 3.6a. The WEIGHT must not swing!
- Push the THUMBPIECE as far as it will go in the direction of the arrow.
- Thread the PROCESS MATERIAL between the GUIDE ROLLERS and MEASURING
ROLLER as shown in fig. 3.6a.
- Slowly release pressure on the THUMBPIECE until the GUIDE ROLLERS return to
their original positions.
It is essential that the THUMBPIECE return slowly to its initial position.
Any uncontrolled snap-back may affect calibration and may also damage the
instrument.
Press the DAMP key.
As long as the DAMP key is depressed, the DISPLAY shows a decimal value higher
than the first decimal value (zero point calibration), e.g.
1000
cN
.
This decimal value may vary from instrument to instrument.
- Release the DAMP key when the value shown on the DISPLAY is stable (the
reading may fluctuate slightly).
The display 7 shows
E - 50
cN
.
2nd calibration point
:
- Hang a WEIGHT which corresponds to 50% of the tension range from the PROCESS
MATERIAL, vertically, as shown in fig. 3.6a.
- Push the THUMBPIECE as far as it will go in the direction of the arrow.
- Thread the PROCESS MATERIAL between the GUIDE ROLLERS and MEASURING
ROLLER as shown in fig. 3.6a.
- Slowly release pressure on the THUMBPIECE until the GUIDE ROLLERS return to
their original positions.
It is essential that the THUMBPIECE return slowly to its initial position.
Any uncontrolled snap-back may affect calibration and may also damage the
instrument.
Press the DAMP key.
As long as the DAMP key is depressed, the DISPLAY shows a decimal value which is
higher than the second decimal value, e.g.
1800
cN
.
This decimal value may vary from instrument to instrument.
- Release the DAMP key when the value shown on the DISPLAY is stable (the
reading may fluctuate slightly).
The DISPLAY 7 shows
E - 90
cN
.
