Germany WILLE This fully automatic electromechanical apparatus is designed to perform Constant Rate of Strain With Controlled Back Pressure which Pneumatic systems are not able to do it in addition to other consolidation tests.It includes of a loading frame (table top or bench top),CRS consolidation cell ,submersible load cell, external displacement transducer , automatic back pressure controller(pressure system) ,Pore water pressure transducer and dedicated software which runs automatically all types of required tests which are pre-programmed in software.
A direct operation and calibration of the device is possible by control unit with keypad and LC-display. The control element made by Siemens Company is an advanced controller which allows the user to enter the numerical values and control the system by other function keys easily.
The CRS cell like the other consolidation cells confines the specimen in a stiff stainless-steel ring and prevent any lateral displacement and two stainless steel porous disc sit on top and bottom of the sample and allow drainage of sample to take place during the test for pore water measurement. During the test back pressure applies on sample automatically by using one of our models of Volume Pressure controllers (VPC).
The Load frame enables the operator to apply different mode of loadings on the specimen therefor the load frame would be a universal load frame for many consolidations or either Triaxial tests (if the large model is selected).The loading frame accept different types of consolidation cells therefor many tests could be performed per as different international standards e.g fixed and floating cells, K0 cell, swelling pressure cell and etc. GEOsys software in combination with this unit performs all your tests automatically and without operator assistance during the test period.
Different Models At A Glance
CRS Consolidation Cell
Advanced CRS-Consolidation Cell made by Wille Geotechnik® is a one dimensional consolidation cell designed to perform back pressure and measuring pore pressures and also perform stress and strain controlled oedometer tests (e.g. CRS, CL, IL or swelling pressure test).It has an internal Load cell located top of the specimen to measure more accurate the axial force on sample. The cell is load frame type and works with variety range of our load frames.
The unique feature of our CRS cell is that this cell is somehow designed to be used also as a Rowe-Barden cell using water pressure or air pressure for axial stresses control.
The cell is equipped with needle valves, stainless steel sample ring and stainless-steel porous discs and there are 2 inlet and outlet connections in lower part of cell and upper part has pressure and deairing connection and needle valves, Teflon guided, low friction stainless steel load piston. The required time to do a compete consolidation test in this method is significantly shorter than normal methods and this is one of the main advantages of this method.
Single Type Volume/Pressure Controller
The device consists of a solid pressure cylinder with integrated spindle drive which pressurizes directly water or fluid for the generation of pressures up to 33MPa. An electronic pressure measuring facility is integrated and need for the operation. Optionally an external pressure measuring facility can be connected (optional item) to pump to make a direct feedback response used in control process, there is an ability to connect an external pressure sensor by a simple plug in. This sensor will be detected automatically after switching-on, by the means of a plug control and the measured value is processed correctly inside the device.
The pressure is regulated under closed-loop control. The pressure will be electronically monitored, when the pressure measuring unit is connected, and will shut down the drive at accident.
Pore-Water Pressure Sensor
Calibrated Pore Water pressure sensor with integrated Amplifier and flushing part to avoid air inclusions or bubbles in pressure lines or transducer membranes up to 2 Mpa.
SIEMENS Industrial Controller
The operation of the device requires the direct input of numerical values besides the use of the function keys. The control element made by Siemens Company is an advanced control panel which allows the user to enter the numerical values and control the system by other function keys easily. You need just to enter the values and press the run Key to start the operation.
The operator panel gives the user access to all functions in the operation and service menu. This enables the user to start and run the pump as well as conduct calibration if needed. These controls are instinctive and simple to use. All functions, such as actual status, flow rate and information on the pressure pumping ramp can be seen on the LCD display on the front of the device.
Main Features
• Graphic display including 10 input membrane keys
• Setting force or position manually
• CE mark
• Ethernet interface
• 22 available different languages
• Multi language menu navigation
• Calibration function
• 4 free analogue Ports with A/D converter (interface+ /- 10 VDC)