Most deformation units use a single chip 24-bit ultra-low noise analog-to-digital converter. This chip combines signal amplification and A / D conversion. Because this set of deformation unit has the characteristics of "single chip as the core and few peripheral circuits", this system has the characteristics of high accuracy, good stability, small linear error and strong anti-interference ability. Reasonable design and good process layout make the amplifier extremely stable. It is a single-chip computer unit connected to the amplifier. As the heart of the host, it is responsible for the amplifier range conversion, data acquisition, data transmission, test mode selection and liquid crystal display of the whole machine. Port output, you can also accept commands from other devices through the RS232 port. Due to the single-chip computer control, this unit has the function of automatic zero adjustment. During zero adjustment, the electronic universal testing machine only needs to press the clear key on the main interface to automatically clear the whole process, and the clear time is extremely short.
Strain-type extensometer is composed of elastic elements and strain gauges attached to it. When the arm of the extensometer is stressed, the elastic body is deformed and the resistance value of the strain gauge attached to it changes. The original balanced electric The bridge loses its balance and outputs a voltage signal output proportional to the deformation. Because the electrical signal output by the extensometer is extremely weak, it must be amplified by the electronic universal testing machine to reach the required value. This work is completely amplified and converted by the A / D converter. , And then sent to a single-chip computer for processing, display in a direct-reading manner, while transmitting to the computer via RS232 for data processing。

As a user, you should also understand some emergency treatment methods for emergency situations in the use of electronic universal tension machines. The more common ones include:1. When the electronic universal tensile testing machine is loaded, the pointer trembles or stops when running: 1) The clutch gear is worn: need to be repaired or replaced;
2) The leather washer or spring of the friction disk is worn: the leather washer or spring needs to be replaced; 3) The shift of the joystick: adjust the joystick to make it fit well with the tooth socket.
2. The pendulum return of the electronic universal tensile testing machine is too fast or too slow: 1) Improper placement of the buffer valve position: adjust the buffer valve to the appropriate position
2) The viscosity of the hydraulic oil is too low or too high: when the viscosity of the hydraulic oil is too low, the pendulum falls back quickly, and when the viscosity is high, it falls back slowly. The hydraulic oil of appropriate viscosity should be replaced.
3) The buffer valve, oil pipe or hydraulic oil is dirty: clean the buffer valve and oil pipe. Replace hydraulic oil.