Relaxation testing machine

Microcomputer controlled steel strand relaxation testing machine: It is mainly used to test the relaxation characteristics of steel strands and other prestressed metal materials. It can also conduct conventional static tensile tests on ordinary steel samples.Loading is carried out mechanically, and the entire test process is completed under computer control.The PC collects, displays and automatically processes data in real time, automatically draws the relaxation force test curve and monitors the test in a timely manner.The SL series microcomputer-controlled steel strand relaxation testing machine is suitable for testing samples with a lower limit length specified in national standards. The SL-W series microcomputer-controlled steel strand relaxation testing machine is suitable for testing relatively long (>2m) samples.The product is designed and manufactured in accordance with GB/T16491-2008 "Electronic Universal Testing Machine"; GB/T2611 "General Technical Requirements for Testing Machines"; GB/T6825.1-2002 "Inspection of Static Uniaxial Testing Machines Part 1: Inspection and Calibration of the Force Measuring System of Tensile and/or Pressure Testing Machines". The complete machine is composed of a host computer, a computer-controlled measurement system and other parts.

■ Meets the requirements of "Stress Relaxation Performance Test" in (GB/T5224-2014) "Steel Strand for Prestressed Concrete" and meets the requirements of (GB/T10120-2013) "Metal Stress Relaxation Test Method".

■It has two control channels of test force and displacement and corresponding control modes such as test force, stress, displacement, etc. The control modes can be switched randomly/arbitrarily; PID control parameters can be adjusted online.

■Can automatically and accurately apply all initial test forces evenly at a given rate.Other constant-rate test force, constant-rate stress, constant-rate displacement tests and constant test force, constant stress, and constant displacement tests can also be carried out. The loading rate is infinitely variable.

■Automatically collect, process, and display test data, and automatically measure various characteristic points of the tested material.

■Automatically draw relaxation force-time curves and automatically adjust coordinates, always displaying instant or complete curves.It can also automatically draw other force-displacement, force-time, displacement-time and other test curves, automatically edit test reports and print them out in a timely manner.

■Automatically measure temperature and draw temperature-time curve.

■Constant displacement control can still be carried out during the relaxation force test to keep the initial total strain or gauge length constant, making it fully in compliance with national standards.

■The test time can reach more than 1000 hours, and the test data can be extrapolated. The stress relaxation performance of 1000 hours can be extrapolated from 100 hours.The use of spoke-type (reinforced elastomer) load sensors is more suitable for long-term detection requirements.

■Has functions such as automatic zero adjustment and automatic calibration.It has original test parameter input function.Test results are automatically stored and can be viewed at any time.

■It has a powerful database and a variety of interface formats for users to choose from to help users achieve local area network communication.

■It has various protection measures such as overload, overcurrent, and limit.

■In addition to testing the relaxation characteristics of steel strands, it can also test the relaxation characteristics of steel bars.In addition, conventional static tensile tests can be performed on ordinary steel samples.

■A reaction frame can be configured according to user requirements so that a pressure sensor can be used to detect the machine.Emergency power supply can be configured according to user requirements to prevent data loss due to unexpected power outages.

Microcomputer controlled steel strand relaxation testing machine technical parameters: