Hydraulic Power Pack
Automatic Hydraulic Power Pack, dual stage, controlled by digital readout unit is designed to supply the required oil to the load frames for loading.
Controller unit has a simple and compact conﬁguration. The Hydraulic Power Pack, Control and Read out Units are positioned on the right hand side of the load frame for easier accessibility, increased productivity and for safer operations.
Very silent power pack can load the specimen between 1 kN/sec. to 20 kN/sec, with an accuracy of ±5%. A Rapid approach pump is supplied as standard. Safety valve (maximum pressure valve) is used to avoid machine overloading.
Maximum working pressure of the system is 400 bar.
Dual Stage Pump
The dual stage pump is formed by two groups;
1. Low pressure gear pump
2. High pressure radial piston pump
On the dual stage pump, a high delivery, low pressure gear pump is used for rapid approach, while a low delivery, high pressure radial piston pump is used for test execution. The rapid approach facility shortens the time interval from piston start until the upper platen touches to the specimen. This excellent feature helps to save a lot of time when a large number of specimens are going to be tested.
The motor which drives the dual pumps in an AC motor and it is controlled by motor inverter. The variation in the oil ﬂow is executed with the variation of the rotation speed of the motor.
A distribution block is used to control the oil ﬂow direction supplied by the dual stage pump, the following parts are ﬁtted to the distribution block; Solenoid valve, Safety valve (max. pressure valve), Transducer, Low pressure gear pump and High pressure radial piston pump.
High Precision Pressure Transducer
The Natek range of Automatic Machines can be upgraded with option High Precision
Pressure Transducer special calibration Class 1 starting from 1% of the full range.
This unique performance enables the machines to be used for a considerable number of applications including:
• Early age (2 or 3 days) compression strength tests
• Flexural and splitting tests by using proper accessories
• Mortar (Cement) compression tests by using proper accessories
• Core Testing
The tank includes enough oil to ﬁll the mechanism which pushes the ram during the test. The level and oil temperature can be seen on the indicator ﬁtted to the tank. It has 25 L capacity. Hydraulic motor oil, number 46, must be used.
Digital Data Acquisition & Control System
The unit is designed to control the machine and processing of data from load-cells and pressure transducers which are ﬁtted to the machine.
All the operations of the unit are controlled from the front panel consisting of a LCD display and function keys.
The unit has easy to use menu options.
Digital graphic display unit loading rate of the time of Testing and load values can be monitored.
Digital graphic display is able to draw real-time “Load vs. Time”.
Sample, company, laboratory and test values can be entered in the programme.
Load-time graphic, test reports and sample reports can be taken.
Software provides test data, results, and the load-time graphs can be seen at LCD screen.
The Automatic Compression Machine can be controlled (Start, Stop commands) by a computer with the software 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 data base 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.