CALTEST Calibration- and Analysis System
Calibration System for FUJIFILM Prescale
FUJIFILM’s pressure sensitive Prescale film is an important tool for the determination of contact pressure. It is ideal for fast qualitative evaluations, as for quantitative measurement, control experiments should to be done prior to the measurement, which are then transferred to calibration curves.
Tiedemann has developed a calibration system, which includes all necessary tools:
- Calibration Plunger KV with two cylindrical, plain-polished plungers with well know front areas to press the material sample and the film
- Compression Device BELV, individually equipped with a Tiedemann ring dynamometer
- Hand Cutting tool SV to cut the Prescale film in the diameter of the Calibration Plunger KV
- Punching toll PV to cut thicker structural material in the diameter if the Calibration Plunger
Calibrations with Different Press Materials
The Tiedemann calibration system is made for smooth surface pressures as well as structured surrounding materials like grids or carpets. In such a case, the structure is visible on the films as well. The impression is difficult to evaluate, therefore it is recommended to place the film between these structured materials during calibration to generate an individual calibration curve for this material.
Execution of the Calibration System
Find the Right Combination of Tools
A basic configuration for surface compressions up to 50 MPa is the Compression Device BELV. Further, you choose the right Tiedemann dynamometer, the KV Calibration Plunger device plus optional the SV Hand Cutter tool. Whether a PV Punching Tool is recommended depends on the ambient structural materials. At surface pressures above 50 MPa, we must refer to your own press.
Calibration Plunger Device KV
Together with the right choice for dynamometer many pressure ranges can be reached. For higher accuracy, the bigger plunger should be used. Because the maximum load of the compression device is limited to 10 kN, you may use the calibration plunger in your own press as well.
Characteristics of KV | KV0.5 | KV1 | KV2 | KV5 |
Plunger diameter (mm) Plunger area (mm²) | 50.46 | 2000 | 35.68 1000 | 25.23 500 |
1 kN load: surface pressure (MPa) | 0.5 | 1 | 2 | 5 |
Compression Device BELV
The KV Calibration Plunger is the main device of the whole calibration system. The four different plungers have four defined circular areas from 200 to 2000 mm².
Cutting and Punching Tools
The optional tools for hand cutting SV are helpful to cut circular areas out of the pressure sensitive film or other thin materials. These circular areas fit exactly to the size of the plunger.
PV Punching Tools are also available to cut thicker materials for the right diameters. For punching the Compression Device BELV may be used as well as your own presses.
Find the Right Combination of Tools
A basic configuration for surface compressions up to 50 MPa is the Compression Device BELV. Further, you choose the right Tiedemann dynamometer, the KV Calibration Plunger device plus optional the SV Hand Cutter tool. Whether a PV Punching Tool is recommended depends on the ambient structural materials. At surface pressures above 50 MPa, we must refer to your own press.
Table Film Types
Film Type | Name | Pressure Range | Compression Device | Tiedemann Dynamometer | Calibration Plunger | Cutting Device | Punching Device |
5LW | Ultra Extreme Low | 0,006 - 0,05 MPa | BELV | 10kN-dig | KV0.5 | SV0.5 | PV0.5 |
4LW | Extreme Low | 0,05-0,2 MPa | BELV | 10kN-dig | KV0.5 | SV0.5 | PV0.5 |
LLLW | Ultra Super Low | 0,2-0,6 MPa | BELV | 10kN-dig | KV0.5 | SV0.5 | PV0.5 |
LLW | Super Low | 0,5-2,5 MPa | BELV | 10kN-dig | KV1 | SV1 | PV1 |
LW | Low | 2,5-10 MPa | BELV | 10kN-dig | KV2 (KV1) | SV2 (SV1) | PV2 (PV1) |
MW | Medium | 10-50 MPa | BELV | 10kN-dig | KV5 | SV5 | PV5 |
HS | High | 50-130 MPa | own press | own press | KV5 | SV5 | PV5 |
HHS | Super High | 130-300 MPa | own press | own press | KV5 | SV5 | PV5 |
The Tiedemann Calibration and Measurement Program CALTEST is an intuitive Windows compatible program that generates calibration curves from the results of the calibration device and offers analysis using these curves.
In addition, the program already includes calibration curves for smooth surfaces at room temperature and various humidity levels for a special DIN A3 scanner defined by us. The calibration curves are valid for 1 min press duration.
Individual calibration curves for quantitative measurements at longer or shorter press durations, higher temperatures or on structured surfaces such as cardboard, lattice surfaces, nub structure or fabric structures differ significantly from those of smooth surfaces and must be created by the user.
![[Translate to Englisch:] Verfärbungsmuster für die übereinander gelegten Folientypen](/fileadmin/_processed_/1/7/csm_caltest-software02_e7734ec4e1.jpg)
Extension of the measuring range
If the expected pressure distribution cannot be covered by the measuring range of a film, several types of film can be superimposed in order to increase the measuring range. The following evaluation shows a simultaneous pressing of several pressure measuring foils for different measuring ranges, which were superimposed.
![[Translate to Englisch:] Detailansicht einer Zylinderkopfdichtung](/fileadmin/_processed_/b/2/csm_caltest-software04_85f6dbf3a3.jpg)
![[Translate to Englisch:] Punktgenaue Bestimmung der Drücke](/fileadmin/_processed_/f/1/csm_caltest-software05_01d28c8021.jpg)
Precise determination of pressures
A further analysis option is sectional views of the printed image. CALTEST offers numerous variants for this purpose. In addition to the simple intersection line in all directions, there is the option for filtering the noise by a chain or rectangular line.
![[Translate to Englisch:] Schnittbild mit Kettenlinie](/fileadmin/_processed_/a/2/csm_caltest-software06_3a5826d8c5.jpg)
Precise determination of pressures
A further analysis option is sectional views of the printed image. CALTEST offers numerous variants for this purpose. In addition to the simple intersection line in all directions, there is the option for filtering the noise by a chain or rectangular line.
![[Translate to Englisch:] Schnittbild mit gerader Schnittlinie](/fileadmin/_processed_/7/0/csm_caltest-software07_a8e270554a.jpg)
![[Translate to Englisch:] Auswertung entlang einer Kreislinie mit Kettenlinie](/fileadmin/_processed_/7/4/csm_caltest-software08_6dc623a2d0.jpg)
The straight line as cut is possible in any direction and results in an exact cut with the respective information about the respective peak pressures and lowest areas.
For O-rings, flanges, etc., the CALTEST offers the possibility of evaluating the pressure curve along a circle line. To do this, define the starting point at any point, which is marked with a circle and no. 1. From there, the pressure curve is displayed clockwise. In addition to the quantitative representation of the pressure curve, the pressures can be precisely quantified at any 12 points.
In addition to many other applications, one should finally be mentioned, the freehand line. It is possible to cut out any areas of the impression, either to delete them or to evaluate only this area.
![[Translate to Englisch:] Darstellung von Drücken in Rot im Intervall 11-13,1 MPa](/fileadmin/Bilder/2017/caltest-software09.jpg)
Operating systems: | Windows XP, 7, 8, 10 |
Stored calibration curves: | For all pressure measurement foils: - Smooth surfaces - Ambient temperature - 40% and 60% humidity - Contact time 60 s |
Application: | Pressure measuring Fujifilm Prescale |
Scanner: | All scanners; Stored calibration curves are only valid for Tiedemann scanner |
Updates: | Included in the license agreement |
Scope of delivery: | Program CD, A3 scanner, 2 licences, manual |
Instruction: | Strongly recommended |
Download
Brochure Tiedemann CALTEST System [PDF, 1.916 KB]
Calibration Sequence picture series [PDF, 1.545 KB]