WDS Series Digital Display Type Electronic Universal Testing Machine

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Product Description:

、Main functions
  WDS series are suitable for tensile, compression, bending,cutting shearing and tearing test of rubber peeling and tearing plastic, electrical wire and cable, composite, profiled bar, waterproof roll, etc. They are essential testing instruments for quality testing section, university and college, research institution and industrial and mining enterprise.
、Product features  
 This machine equips alternating servo motor for driving crossbeam and imported photoelectric encoder for displacement measure. The controller adopts flush type monolithic computer structure and is equipped multitask operating system and built-in powerful test control software, which includes the test system with measuring, controlling, calculating and saving functions.  This machine has the following performances: Automatically calculating stress, elongation rate, tensile strength and modulus of elasticity
;automatically preserving all of 16 groups testing data;automatically recording the value of extremal vertex, breakpoint, appointed value of force and elongation;testing result can be scanned by pages and printed;the third class purview management;real-time electronic clock, and automatically recording the testing date and time.
、Technical Specification:




Measuring range of force (kn)


Accuracy of testing force

±1% of indicated value

Resolution of crosshead displacement Measurement

0.01 mm

Speed range of crossbeam

0.1 mm/min~500 mm/min,step less speed regulation and arbitrary setting

Effective testing space (mm)


Power supply


Working environment


Main configuration

Imported servo motor and speed adjustment system, precision photoelectric encoder.

Overall dimension of host machine (mm)


Weight (kg)


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Q:Working principle of electric contact pressure gauge
I took it apart. It was a curved, hollow, flat copper tube with a toothed ring and a gear mechanism. When the pressure in the pressure vessel, the bending of the flat copper pipe inside there is pressure, with the increase of pressure, the deformation of flat copper pipe (actually get straight, don't think HA), so as to drive the gear to rotate, the rotating gear is very small, with a pointer walk. The dashboard electrical mechanism, two static stylus (point), a stylus (point), a lead, and terminal blocks, two static contacts, a high point, the other is a low point, and the movable contact is contact with the pressure gauge pointer when walking, low pressure and low pressure set value, the movable contact and the static contact pressure, the motor starts to work, the pressure increases, the movable contacts left low voltage static contacts began to rise, when the pressure reaches the set pressure increasing static contact, disconnect the motor stop pressure. With the use of the user or something else, the pressure gradually falls, and then another new cycle begins. I can't get the electrical control diagram on, will I? I don't know what you do. We use a pressure tank here
Q:How do you test the pressure gauge for the pressure vessel?
Each unit has the relevant provisions of the inspection of measuring instruments. The pressure gauge is a strong inspection instrument, which must be inspected once a year (possibly half a year). To the qualified inspection unit to test, is the firm certificate. Note the work smoothly.
Q:The role of the pressure gauge on the train
There are two pressure gauges on the train locomotive, called "balanced air cylinder, double needle pressure gauge", for monitoring the pressure of the equalizing cylinderThe emergency brake beside the carriage also has a pressure gauge in the car. Mainly to look at the pressure of the car air cylinder, referred to as wind pressure.Additional knowledge: how to use the emergency brake valve?When using the emergency brake valve of the vehicle, it is not necessary to break the seal first, and immediately pull the valve handle to the fully open position until it is fully opened so as not to stop or close. In case of a spring handle, you must not let go before the train stops completely. In the long slope, we must look at the pressure gauge, such as gauge is determined by pressure drop 100Kpa, shall not use the emergency brake valve (except when the angle cock is closed).
Q:What are the common measuring ranges of pressure gauges?
0.25mp, 0.6mp, 1.0mp, 1.6mp, 2.0MP, 2.5MP and so on. In order to ensure that the elastic element can work reliably in the safety range of the elastic deformation, the pressure gauge range is selected not only according to the measured pressure, but also should consider the measured pressure change rate, the range need to leave enough room for. When measuring the steady pressure, the maximum working pressure shall not exceed 2/3 of the measuring range; the pulsating pressure shall be measured; the maximum working pressure shall not exceed 1/2 of the measuring range; when measuring the high pressure, the maximum working pressure shall not exceed the 3/5 of the measuring range. In order to ensure the accuracy of measurement, the minimum operating pressure should not be less than 1/3 of the measuring range. According to this principle, according to the measured maximum pressure to calculate a value, from the pressure gauge product catalog select a little larger than the measurement range.The pressure gauge is divided into vacuum meter, pressure vacuum meter, micro pressure meter, low pressure meter, middle pressure meter and high voltage meter according to its measuring range. Used to measure the atmospheric pressure is less than the pressure value of the vacuum gauge; pressure vacuum gauge used to measure the atmospheric pressure is larger than the pressure value; micro pressure gauge for measuring the pressure value is less than 60000 Pa; low voltage meter for measuring 0~6MPa value of pressure; pressure meter for measuring 10~60MPa value of pressure; pressure gauge for measuring the pressure value of more than 100MPa.
Q:What does the condensing pressure gauge in the refrigeration system measure?
Condensate pressure gauge condensing pressure measured by the condenser, the condensation pressure can check the condensate saturation temperature, condensation temperature - saturation temperature before throttling (cloth line system temperature) = supercooling degree, calculate the degree of supercooling is appropriate.At the same time, through the condensation temperature, the pressure is normal, taking into account the different temperature, the pressure should be also different, the condensation pressure is too high, can be said to be too much or not enough refrigerant condenser (considering the design), or a condenser outside of the room is dirty, the motor speed is low (considering maintenance), the condensing pressure is mainly to see whether the pressure is too low, you can calculate the degree of supercooling, there is no reasonable use of condenser;
Q:How can the frequency converter and the electric contact pressure meter be connected?
Backward, change the remote pressure gauge, do PID control, set the sleep parameters
Q:Do electric contact gauges come with 24V contact with gold?
I don't think it's necessary to use gold for contacts.1. The action of a contact on a pressure meter is equivalent to a switch used to conduct or disconnect the circuit. It does not require a power supply. The maximum operating voltage is 380V, and it can also be used for 220V or 24V (including AC and DC).2. Electric contact pressure gauge in the work process, will not contact in contact contact, due to voltage, spark will contact between the spark can burn contacts, lead oxide, so the electric contact pressure gauge work after a period of time will produce the phenomenon of bad contact, and can work normally after cleaning contact.3. In order to make the electrical contact work long time, it is important to note that the work power of the coil of the small relay in the back shall be controlled below 30W, otherwise it will burn up easily (contact power rating 30W).4. What material to choose contact is to consider comprehensively, choose pure gold or pure silver, only contact resistance is small, other aspects will not do.Our company produces a variety of electric contact pressure meter, suitable for a variety of industrial and mining use, interested can go up to see.
Q:Why can't ordinary pressure gauge be resistant to high temperature?
The definition of high temperature is uncertain. You can look at the parameters of the pressure gauge
Q:What does the red line on the dial of the pressure gauge stand for? Is the design pressure or the maximum pressure?
Extreme pressure means that this red mark cannot be reached
Q:The injection molding machine doesn't have pressure, what's wrong with it and the pressure gauge doesn't reflect it?
Power supply, motor starting and turning to the right, well connected with the oil pump motor, pump in turn, hydraulic oil, proportional valve plug loose, electric proportional valve, proportional valve card is not card, proportional valve and oil outlet plug without blocking, so a sequence

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