Principle
The VARIDIM system includes : 1 wet air generator (with a compressed air
pre-treatment device and a control unit), 1 expansimeter, 1 PC that controls
the complete process with 2 application softwares.
The compressed air of the mill is treated (extraction of oil and moistures)
the generator, because of its distilled water tank, supplies 15 and 90%
RH humid air, with a flow amounting to at least 4 - 5m3/H, with a practically
zero inertia. This humid air is forwarded to the expansimeter.
The 10 paper samples are vertically fixed with magnetic clamps. Each position
sensor is attached to the paper with a specific magnetic clamp. The weight
applied to the paper can be selected manually (permanently) or automatically
(temporary, controlled by the PC). The original lenght of the samples is
very easily adjustable. Humidity and temperature are mesured in the expansimeter.
Due to its very easy to use program, the PC allows you to :
- Program the trial very easily : the number and the duration of set points,
the humidity for each set points, with the possibility to achieve a serie
of set points,
- achieve easily a complete range of results in the form of tables and curves,
- transfer these results to a worksheet.
Use
The VARIDIM system is extremely easy to use. It is only necessary to position
the paper samples : it is very easy (magnetic clamps), to check the distilled
water level (generator), to program the parameters of the trial, that
will then be achieved according to the program defined by the operator.
During the trial, the operator can check the correct running on the stretch
curves in a real time. At the end of the trial , complete results (curves,
tables) are available.
Results
After the trial, the program works out the following results :
- Tables
- lenght variation (%) / humidity
- specific elasticity / humidity, hysteresis
- YOUNG modulus / humidity
- Curves
- lenght variation / humidity
Flexibility
- At the software level : national language, flexibility, menu, access
to all useful parameters.
- At the level of the expansimeter : selection of the weights applied
to each paper sample, as per standard ISO 8226. Selection of the original
lenghts of paper.
Time saving - autonomy
Only a few minutes are required to prepare and select a new trial, which
will then run unattented for more than 15 hours.
Performances
- Accuracy : the selection of the materials, of the components, and the
quality of the results achieved, ensure a very high accuracy.
- Standardization : the possibility of controlling and standardizing the
lenght measurements is a guarantee of good results.
Technicals
caracteristics
Expansimeter
* Steady surrunding running temperature
* Samples
- Number
- Width
- Useful lenght
* Load
- Total weight of the lower clamps
- Selection of overweights or raccording to standard ISO 8226
* Temperature / humidity sensor
- humidity scale
- temperature scale
* Accuracy
- humidity
- temperature
-Lenght at 25°C
|
20
to 40°C
10
15mm
50, 100, 150, 180, 200mm
43g
+100, +200, +300
to 100% HR
0 to 100°C
+ or - 2% HR
+ or - 0,5°C
+ or - 3 micron
|
Air
generator
* Conditionned air
- RH minimum
- RH maximum
- Accuracy
- Inertia
- Standard flow
- Output pressure |
15%
90%
+ or - 2% HR
less than 10s
4 to 5 m3/H
0,1 to 0,2 bar |
PC
* Compatible
* Data logging
- Number of humidity set points
- Stabilization time for each set points
|
IBM
AT
24 maximum
5 hours maximum
|
|
