HYDRAULIC UNIVERSAL TESTING MACHINE

EKE 3000: Automatic 500 kN Tension and 1000 kN Compression Testing Machine

Ref. Standard: BS 1610, ASTM C-39, E4 AASHTO T22, NF P18- 411, DIN 51220

GENERAL PROPERTIES:

EKE 3000 automatic 500 kN tension and 1000 kN compression testing machine has been designed to meet the need for reliable and consistent tensile testing of steel rebars up to 22 mm diameter and compression testing of concrete cube samples up to 150 mm and cylinders up to 160x320 mm.

This lightweight low cost and high accurate machine is suitable for use both in the site testing and educational purposes. EKE 3000 feature the complete automatic test cycle with a closed loop digital readout. Once the specimen parameters have been introduced, it is sufficient to press the START button to complete the test.

EKE 3000 tension/compression test machines consist of three main parts: Frame, power pack and data acquisition & control system. On the measuring system pressure transducer is used for load measurements and Linear Potentiometric Displacement Transducers is used for strain measurements. Each part has been designed to manufacture machines with a high degree of mechanical stability and complies to BS 1610, ASTM C-39, E4 AASHTO T-22, NF P18-411, DIN 51220 (with suitable platen set) standards.

FRAME:

The load frame is a welded steel fabrication carrying the ball-seated upper platen or the universal grip assembly. Positively located on the loading ram which is protected from debris by a cover, the lower platen is marked for the centering of cube and cylinder specimens. The dimensions of the frame allow the tension tests on steel rebar up to 22 mm dia., and flat specimens up to 15mm thick and 50mm wide, compression tests on concrete cylinders up to 320 mm long x 160 mm diameter and cubes up to 150 mm. The machine is supplied complete with 5 pcs. 90 mm x Ø165, 2 pcs. 50 mm x Ø165 and 2 pcs. 30 mm x Ø165 distance pieces. To test samples shorter than 150 mm extra distance pieces should be ordered. The frame have a double acting piston with over travel protection to stop the motor when the maximum platen or grip travel be reached.

• The main characteristics are:
• High stability welded assembly
• 500 kN tensile and 1000 kN compression capacity
• 100 mm piston stroke with safety limit switch
• Upper compression platen with ball seating assembly and lower platen included
• Set of two tensile grips and jaw faces included
• Platen hardness of min 55 HRC
• Distance pieces included

EKE 4830:

The EKE 4830 Automatic Hydraulic Power Pack, dual stage, controlled by EK.EC 100 is designed to supply the required oil to the load frames for loading. The power pack is very silent, even at full load and 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. A safety valve (maximum pressure valve) is used to avoid machine overloading.

The main characteristics are:

• Low pressure gear pump
• High pressure radial piston pump.

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 alot of time when a large number of specimens are going to be tested.

The motor which drives the dual pump is a 0.75 kW AC motor which is controlled by an Omron J7 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 (maximum pressure valve)
• Transducer
• Low pressure gear pump
• High pressure radial piston pump

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 20 L capacity. Hydraulic motor oil, number 46, must be used.

• Can make test with displacement or load control.
• Real time display of test graph.
• CPU card with 32-bit ARM RISC architecture
• Permanent storage capacity up to 10000 test results
• 4 analog channels (one for load cell, one for displacement transducer, one for extensometer and one is free for extra compression frame
• Programmable digital gain adjustment for load-cell, pressure transducers, strain-gauge based sensors, potentiometric sensors, voltage and current transmitters
• 1/256000 points resolution per channel
• 1000 data per second sample rate for each channel
• Ethernet connecting for computer interface
• 800x480 resolution 65535 color TFT-LCD industrial touchscreen
• 4 main function keys
• Multi-language support
• 3 different unit system selection; kN, Ton and Lb
• Real-time clock and date
• Test result visualization and memory management interface
• Remote connection through ethernet.
• USB flash disc for importing test results and for firmware
• USB printer support for inkjet and laser printers (ask for compatible models)
• Camera support for real-time video recording during test (ask for compatible models)
• Free of charge PC software for the test control and advanced report generation

• Max pressure valve to avoid machine overloading
• Ram travel switch to prevent excessive piston travel