Servo Hydraulic Universal Testing Machine, Servo Valve 

UTEST series Servo Controlled Hydraulic Universal Testing Machines are suitable to test various metallic and non-metallic materials and can carry out tension, compression,  flexural and bending tests. There are three models namely, the UTM-6060.SVD2 (600kN), UTM-6100.SVD2 (1000 kN) and UTM-6200.SVD2 (2000 kN). The load cell is used for load measurement to achieve the best load accuracy in all models. The load accuracy of the systems is ±1% down to 2% of the full capacity.  Strain measurements are conducted by the electronic displacement transducers built in the machine. Displacement or strain measurement can be also conducted by an external extensometer fitted to the specimen. The accuracy of the strain measurement on frame is 12.5 microns.

The machine can carry out tension test, compression test, bend test and flexure test by two pace rate type including load control and displacement control. Those two control parameters can be switched during the test. According to the preset condition, the systems can realize constant-rate loading, loading according to preset curve, testing with constant-rate displacement.

With a powerful testing software, all three models can acquire, dispose automatically testing data, display real-timely stress-strain curve, load-deformation curve, load-time curve and other related curves, at the same time, can save, output, print test report and data with customized format. This machine can be widely used in R&D, Universities, Quality control and Inspection Companies and calibration centres/laboratories.

The unit consists of a frame and a power pack with servo valve and advanced motion control unit. (See below)

Load Frame

Load frames used on Hydraulic Universal Testing Machines have a motor driving system to set distance between grips for test set up has a rugged six column construction for exceptional load frame rigidity. All models feature two test spaces for tension test and compression/flexure and bending test. Users can quickly change between tension and compression/flexure and bending testing without having to remove heavy fixtures. This flexible design also helps to ensure safety, reduces operator effort and improves productivity. The distance between the grips can be set by the motor driven hand set system for different specimens. With an open front hydraulic wedge grip, the user can change jaw faces and load specimen easily.

All frames are supplied complete with a set of tensile grip, the UTM-4018 hydraulic power pack for tensile testing grips, jaw faces for round and flat samples and a set of compression platen.

Power Pack

Servo controlled hydraulic power packs with servo valve and advanced power packs are used on all models to perform tests under load and displacement controls. Power packs are designed to supply the required oil to the load frames for loading, unloading or low cycle dynamic testing and also hydraulic grips.

The main characteristics are:

• Frequency of the P.I.D controller and data acquisition :1000 Hz.
• Touch Screen LCD display of 240x320.
• Two Extra Analogue channels for sensors (e.g. Load Cells, Pressure Transducers, LVDT's, strain gauges, extensometers)
• One TTL displacement transducer input for frame displacement measurement.
• Can be connected to the computer through the Ethernet port for advanced test cycles, data acquisition and reporting.

The modulus of elasticity, Poisson's Ratio and compressibility parameters is easily and properly evaluated by attaching extensometers or LVDTs on to the sample. All the calibration values of the transducers and also all the test parameters for the last test is automatically stored on the control unit. Power pack incorporates a pressure safety valve for each frame separately with a cooling unit.

Firmware

• Two extra analogue channels
• Instrumentation amplifiers for sensor excitation and amplification
• 000 resolution and 1.000 Hz control for each channel
• Ethernet port
• 240x320 pixel LCD display
• Touchscreen operator panel
• Can execute load or displacement controlled tests
• Free of charge PC software for test control and advanced report printout
• Factory install English and Turkish languages
• Lbf, kN, kgf

Extensometer

The Extensometer can directly measure deformation of specimens. It either measures separately thermal expansion strain of specimens or eliminate thermal expansion to avoid effecting deformation of specimen.

Data Acquisition & PC Software (USOFT-6060.SVD2)

The Universal Testing machine can be controlled (Start, Stop commands) by a computer with the software (given free of charge). This software provides data acquisition and management for compression, tensile and splitting tensile test throughout the test execution. The advanced functions for database management provide an easy navigation of all saved data. The test results certificate includes all descriptive information. Therefore, test parameters can be set and details about the test carried out such as client details, test type, specimen type, user info and other information required can be entered and printed out as well as test report and graph.

Universal Test Software is developed for testing tensile strength of Reinforcing Rubbed Steel Bars and Welded fabric for the Reinforcement and Prestressing of Concrete. The software includes control of machine, data acquisition, saving them and preparing reports. The user can prepare their own report and can export results to Microsoft Excel. The software accepts sample's weight, length, diameter and gauge length as input, and then the user can start the test. The samples calculated diameter gives user a perspective about the density of rebar prior to the test. The software continuously updates load,stress and elongation percentage till the break point. When the test is completed, the yield point is calculated and indicated on the graph. Each report is a group of 42 samples where 14 different diameters had been entered. The software is prepared by making at least 3 samples for each diameter. This gives user a total report of the entire batch. The report includes all standard limits and one can easily check whether the sample can be acceptable. These limits are minimum yield, minimum tensile, minimum break elongation value, Tensile per yield ratio etc. The user can zoom on the graph for a further inspection. The Break elongation value can be synchronized with the manual measurement after the test has been completed for the users that do not use extensometer.

• Foreign Language Support and Customizable User Interface

All contents of experimental data and additional information can be organized by the user.

• Capability to Save 24 test results of different specimens in one test folder

Test results, graphics, and properties of 24 different specimens can be saved in one folder. Old test folders can be reviewed and be edited easily. Advanced Graphic User Interface Software.

• Graphical data on the screen is refreshed simultaneously during test procedure

Load values can be monitored in high resolution graphics at every 100 milliseconds. Users can highlight all 24 different specimen curves or preferred ones in different colours on the graphics. Zooming in–out and dragging can be done easily by mouse. Peak values of curves can be marked on the graphics and users can get load value of any point on the graph via high resolution.

• Able to save frequently used texts in memory and recall them when necessary.

Frequently used information like name and location of the laboratory, type and dimensions of mostly used specimens are held in memory and can be written automatically by right clicking on information boxes and selecting frequently used text in menu.

• Capable to Access and use previously done test data

User can access any data of previously completed tests and use in his/ her new report since most of the tests have same structure and properties.

• Able to edit test parameters of the testing equipment through Software

All test parameters supported by testing equipment can be changed remotely via software. All test parameters specified by user are downloaded to the device before initialling the test procedure. By this way predefined device parameters will not cause errors in test results.

• Graphical outputs and reports can be saved as a MS Excel worksheet

Test result parameters and graphics can be exported into MS Excel worksheet properly to users to edit data and graphs..

• Maximum Flexibility to edit report and graph templates.