The new CAS touch! Charge Analyzing System combines proven methods of particle charge measurement with the known great simplicity of handling and functioning of the previous CAS versions, but enhanced with new features and an immense reduction in weight and size.

Basics:

Using standard techniques of titration, the CAS touch! determines cationic/anionic and acid/base demands of aqueous charge systems. Modern electronic components enable the high accuracy of measurement. Both, Streaming Potential (mV) and pH can be measured simultaneously, making it possible to easily determine isoelectric and flocculation points of a sample and examine the correlation between pH, titrant demand and streaming potential.

Customer’s choice:

The CAS touch! uses integrated high precision titrators, optionally with 1 or 2 titration systems (CAS-I touch!, CAS-II touch!), while also a version for use with external or hand titration is available to the customer (CAS-E touch!).

Measurement / Result evaluation:

The CAS touch! can be operated via Touch Screen, which displays the data including titration curves, optionally in combination with an external keyboard. Moreover, there is no need to adjust to a new software, as the device can also be used with the common easy-to-handle CAS PC software. The efficient testing procedures implemented in extremely user-friendly PC software make it very easy to handle. Different titration procedures are available: fixed increment titration, dynamic titration and back-titration are selectable from given procedures or are freely configurable. Default standard titration procedures and customer-specific processes can be stored in the CAS touch! via the PC software or Touch Screen. Data can be stored internally as well as externally on an USB flash drive, analyzed with PC software and exported to Excel (only two mouse clicks).

Transport / Assembly:

The low weight device can easily be transported in a carry-on size case, which is especially important for chemical suppliers for customer visits.
After unpacking the device and connecting it to the mains voltage, the CAS touch! is ready for starting the measurement! There is no complicated assembly and no tubes are needed.

Features:

The new FPA touch! Fiber Potential Analyzer.

Accurate and easy determination of the zeta potential of fiber suspensions

Advantages:

• Smaller and significantly lighter than comparable devices
  • Comfortable carriage in
  • transport case with carry-on luggage size or
  • one transport case combined with CAS touch! Charge Analyzing System
• Latest state-of-the-art capacitive Touch Screen with display of results and curves
• External keyboard connectable (USB or wireless)
• Internal memory for measurement data
• For titration of liquids, titrator can be connected.
• Ready to use without assembly of further components
• Easy handling, clear and simple-to-understand measuring procedures
• Compact and robust construction

Features:

The new FPA touch! Fiber Potential Analyzer combines proven methods of Zeta Potential measurement with the known great simplicity of handling and functioning of the previous FPA versions, but enhanced with new features and an immense reduction in weight and size.

Surface charges of fibers, fillers, particles or colloidally dissolved substances in stock suspension are defined by the Zeta Potential on their surfaces. The charge of the stock suspension can be split into the colloidal and particle charge, measured with the CAS touch! Charge Analyzing System, while the fiber and filler charge is measured with the FPA touch! Fiber Potential Analyzer. All both charge levels together define the overall Zeta Potential of fiber suspensions.

The knowledge of the fiber charges in the pulp is the key for optimized dosage of chemical aids, which should be adsorbed onto the surface of the fiber. The mostly negatively (anionic) charged fiber is adsorbing the positive (cationic) charged additives in the papermaking process. The optimized dosage of such aids always depends on the Zeta Potential within the pulp.

The FPA touch! is designed to determine the Zeta Potential of fibers according to the Helmholtz-Smoluchowski equation by simultaneously measuring conductivity, pressure and the streaming current potential. The measuring principle is based on the streaming current potential measuring method in a fiber plug. That fiber plug is automatically building up on a screen electrode in the measuring cell of the FPA by a vacuum. By periodically changing the vacuum during the measurement the charge clouds absorbed on the fibers are moving with the liquid stream and generating the streaming current potential measured by the screen and ring electrode.

The knowledge of the fiber charge enables a correct and effective dosage of the charged chemical additives. The fiber adsorption of cationic starch, wet strength resin, and many other chemical aids can be easily measured with original samples on-site to optimize the dosage of chemicals in the wet end of the paper manufacturing process.

NEW:

• Lighter, Smaller: Carry-on luggage size
• 5“ Touch Screen Display for data display
• External keyboard and USB flash drive can be connected
• For titration of liquids, titrator can be connected.
• No external hoses or tubes

Main features:

• Filtrate removal for CAS touch! measurements
• Simple handling, robust design, high accuracy and reproducibility
• Fully automatic measuring and cleaning procedure (menu-controlled), automatic pressure control and removal of the fiber plug after the measurement
• pH measurement optional
• Integrated vacuum pump is water protected: pump cannot be destroyed by filtrate overflow (No big and noisy external vacuum pump)
• No external connection cable for electrodes - thereby prevention of handling errors
• Display of measuring results on touch screen or via high-performance PC Software with display of trends
• Storage of data on internal data memory of the device, USB flash drive or on the PC when connecting PC software
• All components at latest technological standard

DFA Dynamic Filtration Analyzer determines quickly and accurately the influence of chemicals on the filtration characteristics of fiber suspensions by an automatic analysis of drainage and retention.

The DFA is operated by a PC. The user-friendly software controls the measurement and allows a sophisticated analysis and reporting of all results. In order to simulate different process conditions, all relevant data to configure a mixing profile is stored and used for automatic measurements.

The user selects a mixing profile or sets all relevant mixing parameters before starting the measurement. After that the DFA stirring chamber fills with the fiber suspension. The selected set mixing profile starts to stir the suspension as per set parameters. A dosage of chemical additives during the stirring process is possible to influence the drainage and retention process. Thru the use of audible prompts the user is notified when to introduce any chemicals. A valve opens automatically when the mixing process is finished. Filtration through selected screen starts immediately.

Filtrate is continuously measured with approximately 5 sample points per second. The quantity of filtrate is shown on a graph as a function of time. The computer software allows displaying different graphs, comparing results, adding all kinds of parameters to graphs or creating comparable graphs. E.g. the quantity of dosed chemicals can be compared to the dehydration velocity. The export of all measurement data into an EXCEL-spread sheet for further analysis and data storage is possible. The instrument also has an integrated pH-measurement.

DFA Handling Video

retention measurement:

The DFA system is equipped with the possibility to calculate Total Retention and Filler Retention. A filtrate is produced by the DFA system for determining the retention. Different practical filtration conditions can be simulated with a magnetic valve under the filter and different mixing gears. The filter remains clean by the mixing gear. The user has to enter the filler content or the overall solid content of the filtrate and the sample in the PC and get the total or filler retention by the DFA software.