Bohlin software - Malvern.de

Key features of the Bohlin Windows system include:

High speed data link quickly presents information and raw data on the screen in real time during complex measurement protocols.

Extensive on-line help system with 'textbook' allows users to access help on all aspects of instrument usage, hardware selection and rheology theory.

Multi lingual option for configuration of the software into local language variants.

Multiple user configurations enables the software to be individually configured for different users. Access can be controlled using a user password option.

Unlimited length note editor for recording extensive sample and experimental details.

Curve comparison function for retrieval and simultaneous presentation of an unlimited number of experiments.

Fully flexible legend key for distinguishing variables or samples by defined color and symbol.

Full gap control allows the rheometer gap to be zeroed from the PC as well as programmed for closure, normal force control or thermal gap adjustment. **

Profile mode for temperature, shear stress or shear rate to simulate processes.

Multiple sampling regions in creep and relaxation testing give complete flexibility between linear and logarithmic modes for accurate zero shear viscosity determination. *

User defined tests can be programmed for easy retrieval and re use for convenient repetitive testing.

Model Fitting includes all commonly used linear and non linear fits for rapid and easy correlation of experimental data to theoretical or empirical models.

A Scripting System provides a powerful tool for writing methods.
User defined variables enable a separate numerical field to be defined (e.g. pH) alongside the rheological data file.

Integrated data processing allows rapid data analysis and numerical operations within the measuring program.

Graphics 'zoom' for easy and convenient magnification of key data.

Superpave test mode (bituminous samples only) for simple comparison of test samples against the Superpave pass/fail criterion. A grade determination test is also available.

Automatic print/plot facility.

Thixotropic loop and area analysis.

Data file time stamp.

Pass/fail criteria on model fit results for QC/QA

'Autosave', of data at specified time intervals.

** Not applicable to Visco 88.

Overview of Operation Modes

Viscometry Mode measures viscosity as a function shear stress or shear rate. Shear rate sweep, shear stress sweep, time sweep (isothermal) and temperature sweep (gradient or step change) modes can all be programmed. A continuous ramp (yield stress) experiment is also available.

Visco 88 Viscometry Mode: Viscosity as a function of time, temperature or shear rate. Programmable integration and delay times. Shear rate selectable from user defined table generated from over 250 discrete shear rates.

Oscillation Mode measures the dynamic viscoelastic properties as a function of frequency. Frequency sweep, stress sweep, time sweep and temperature sweep (gradient or step change) modes can all be programmed. Frequency, time and temperature sweeps can be programmed at constant stress or constant strain amplitude (autostress).

On digital rheometers, 'direct' strain controlled oscillation tests are also available

Creep Mode measures the creep compliance and recoverable compliance as a function of time to determine the elastic compliance as well as the zero shear viscosity. Flexible zoned sampling is user defined. Ninomiya extrapolation is available as well as MWD correlation to the zero shear viscosity.

*Relaxation Mode measures the relaxation modulus as a function of time following a step change in strain to compute the relaxation spectrum. Flexible zoned sampling is user defined. The zero shear viscosity can also be computed from the relaxation test data.

* Test available on digital (DSP based) systems only