Load frame is steel welded fabricated. It is designed to withstand a few million times of full cycles of loading without any sign of distortion or fatigue. These frames are light in weight. The base carries a fine finished hydraulic ram and the lower platen. The top plate has the spherical seating to take care of any irregularity of the specimen surface or slight misplacement of the specimen from the central position.
Pumping unit is attached on the right hand side of the loading unit. It is a multi plunger pump submersed in the tank and is powered by 1.5 kW electric motor. Power pack gives non-pulsating flow to the hydraulic ram. This ensures smooth loading of the specimen which can be seen by the movement of the load gauge/digital display. The flow of the oil can be precisely controlled by the strain control knob located at a convenient height. With the proper check on the oil, the life of the pumping unit and the hydraulic ram is almost as long as, life of machine.
Pace rate is achieved manually by controlling the flow control knob and the system is released manually after the peak load is achieved.
Indication of load is on digital display system, which is directly indicated in respective engineering unit. The electronic display unit is totally microprocessor based with a built in USB/ Ethernet. It has indication for load, peak load, pacing rate and pace rate indicator. Load is indicated in terms of kN. System has facility to store results of more than 5000 tests in the memory, which can be off loaded on a Computer.
Pace rate is achieved manually by controlling the flow control knob and the adjustment can be made by observing the error on the display and the system is released manually after the peak load is achieved.
Salient Features of System
Optional at extra cost – Displacement Transducer (0-20mm x 0.01mm)
HEICO Automatic Compression Testing Machine is capable of conducting compression tests on concrete specimens and allied products. It is a state of the art machine in which loading is controlled automatically through a combination of advance electronic and hydraulic system. The complete system consists of Load frame, Hydraulic pumping unit & Microprocessor based digital Indicator.
This Model is similar to Model- HLM592 except that it has Microprocessor based digital display system with storage facility of test results automatic controlling of programmed pace rate up to failure in place of simple display unit.
Other essential parts like Hydraulic Pumping system and loading unit remains the same as described earlier in Model-HLM592.
The pace rate is programmable and controlled automatically.
The equipment has an arrangement for automatic pacing system, which is achieved by the combination of advance hydraulic and electronic system.Control signal from the electronic system is passed on to the drive of the motor through the P.I.D. Controller which in turns control the flow to the hydraulic ram thereby keeping the pace rate within +/- 2% of the pre programmed value. After failure load, the machine has to be released through operation of ball valve. All controlling is through the membrane key board.
Microprocessor Based Touch Panel Display & Control System
Control system provides the digital servo control, Ramp generation for the machine, data acquisition, etc. for the continuous operation of the system.
Salient Features of System
Optional at extra cost – Displacement Transducer (0-20mm x 0.01mm)
LOAD FRAME
Load frame is steel welded fabricaed. It is designed to withstand a few million times of full cycles of loading without any sign of distortion or fatigue. These frames are light in weight. The base carries a fine finished hydraulic ram and the lower platen.The top plate has the spherical seating to take care of any irregularity of the specimen surface or slight misplacement of the specimen from the central position. Front cover is provided, made of acrylic sheet, as a protection to the operator while at the same time giving an unobstructive view of the specimen under test.
Pumping Unit
Pumping Unit is kept on the left hand side of the loading unit. It is a multi plunger pump submersed in the tank and is powered by suitable capcity electric motor. Operating on 440 Volts, 50 Hz A.C. supply. (Other voltages optional).
It has an arrangement for automatic pacing system which is achieved by the combination of advance hydraulic and electronic system. Control signal from the electronic system is passed on to the high speed proportional valve, (closed loop system) as shown in the figure which in turn controls the flow of oil into the the pacing rate constant irrespective of any change that occurs in the specimen during the process of testing. Pacing rate is set on strain or stress basis. All the set parametres are entered through computer. The machine is very simple to operate. Load is automatically released after the peak value is achieved.
Salient Features of Software-
Analysis Software
Plotting of following graphs
a) Load v/s Time
b) Displacement v/s Time
c) Load v/s Displacement
d) Stress v/s Strain
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