|
|
|
The continuous development of the reliable Physica MCR technology enables you to achieve even more from the attainable frequency ranges.
|
| |
Excellent high-frequency behavior
|
|
The measurements shown in the graph were carried out with a standard stainless steel cone with 50 mm diameter and various silicone oil standards.
|
| |
High frequencies
|
|
Measurements at high frequencies require extremely good control of the measuring drive. Constant further development of the control electronics and core technologies, i.e. the rapid and synchronous (simultaneous movement and control of the rotor and stator magnetic field) EC powerdrive motor 1) enable a previously unattainable performance. The EC powerdrive is not to be confused with the asynchronous function of a drag cup motor.
|
| |
Low frequencies
|
|
In the lower frequency range the frequency limit of 10-4 Hz has been removed. This allows measurements in previously unattainable frequency ranges 2).
Measurement of the G’ and G’’ moduli at low frequencies gives insight into the long-term behavior of materials. However, a single period of oscillation at a frequency of 10-5 Hz requires 28 hours. That means you see the first measuring point more than one day after the start.
Nevertheless, we don't want to keep these new possibilities from you. You can shorten the measuring times by analyzing only one oscillation (it is also possible to record partial oscillations, although this results in a corresponding loss of quality). The Multiwave test is also an interesting alternative for experienced users.
|
| |
Outstanding in all frequency ranges
|
|
Tests on the practical frequency range limits of the new Physica MCR series reveal that:
- The new Physica MCR rheometers have excellent frequency control, both in the lower and upper frequency range.
- Even when measuring low viscous oils 3) it is possible to apply the whole specified high-frequency measuring range.
1) Developed and produced by Anton Paar GmbH
2) In combination with the newly developed firmware V2.71 and RheoPlus V2.65 or higher
3) At viscosities of h>1000 mPas up to 100 Hz or 628 s-1
|
| |
)
