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EHC-1300 System for Electro-Hydraulic Servo Pressure Testing Machine

EHC-1300 system pressure testing machine
The system is composed of the independently developed EHC-1300 servo measurement and control box, GS-82A digital servo valve group and SuperTest V7.2 testing and control software.

It is suitable for working together with the the electro-hydraulic pressure testing machines from testing machine manufacturers, to compose the electro-hydraulic servo pressure testing machines.

It is also suitable for the detection organizations to deal with the automatization upgrading and reconstruction of their old 300kN-3000kN pressure testing machines and upgrade them to electro-hydraulic servo pressure testing machines.
  • Our EHC-1300 system is able to implement constant speed loading, load maintenance, constant speed unloading control for the pressure testing machine. It has the features of high control precision, strong adaptability, long-term stability and so on.
  • The system can implement the whole control process from data acquisition, PID computing and Ethernet communication operation to the output control in a short period of time, thus achieve the accurate closed-loop control for the testing machine.
  • The input channel adopts the separate 24-bit A/D converter for high-precision data sampling. The effective internal code is up to ± 200,000.
  • Has up to 15 linear compensation and correction function and greatly improve measurement range and measurement accuracy of the sensor.
  • The measurement unit of the system adopts high precision load sensor.
  • The controller uses Cotex_M3 32-bit high-speed ARM chip as the master chip, has high computing speed and data processing capabilities.
  • Has one input channel for pressure sensor or load sensor.
  • Has 4 switch input interfaces: can be connected to 4 limit switches to input signal.
  • One digital servo valve interface: to connect GS-82 digital servo valve.
  • One electromagnetic reversing valve interface: to connect DC24V rapid return oil electromagnetic valve.
  • One overload protection interface (normally closed contact): connect to the oil pump control circuit. Automatically stop oil pump when testing machine is overloaded.
  • It uses the PID control strategy to achieve the load closed loop control , as well as achieving the functions of constant speed loading, load retention and constant speed offloading. Loading speed can be configured freely.
  • One 100MHz Ethernet communication interface, achieve high-speed data communication with PC. Has the function of real-time data acquisition upload and real-time delivery of control instructions, so as to achieve the purpose of controlling the testing machine by PC in real-time.
  • One RS232 microcomputer communication interface, can be connected with our EPC series touch-screen tablet computer, to achieve the purpose of controlling pressure testing machine through touch-type tablet computer.
Product NameSpecificationAmount
Electro-Hydraulic Servo Pressure Measure and Control BoxEHC-13001 pc
Pressure Sensor30MPa1 pc
Digital Servo ValveGS-82A1 pc
Reducing Valve
YG-1611 pc
Control Connecting CableEHC-13001 Set
Measure and Control SoftwareSuperTest V7.21 Set