WDW Series Computer Control Type Electronic Universal Testing Machine

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 WDW series are suitable for tensile, compression, bending ,cutting, shearing and tearing test of rubber, plastic, electrical wire and cable, composite, plastic profiled bar, waterproof roll, etc. They may add test methods or rules according to customers’requirement .They are essential testing instrument for quality testing section, university and college, research institution and industrial and mining enterprise.


Product features:


1,This machine equips alternating servo motor for driving crosshead and imported photoelectric encoder for displacement measure.

2,This machine is accompany with the digital multi-channel closed loop control system which applicates the latest monitoring and control systems with lots of advanced professional and technical development. ,

3,Control software can automatically finger out routine data, such as tensile  modulus of elasticity, extend rate after rupture, non-proportional extend strength RP0.2, etc.

4,It can realize three closed loops control and real time display many testing curves of force-displacement, force-time, and stress-strain. These curves automatically switch. Testing process control and data processing conform to the requirements of GB.  

5,This machine has the following performances: Auto zero, auto gear shifting or no subsection, auto indication, auto save, unicontrol or multistep programmed control, auto stop, auto analysis or assistant manual analysis, batch test, testing result statistic, curve select and over load protection. And the machine is beautiful, multifunctional, and operates easily and reliably.

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Q:Pressure gauge model Y100-1.6KPa
Contradiction between model and rangeModel is the ordinary pressure gauge (range 0~0.1~100MPa)The measuring range is the diaphragm pressure gauge (model YE-100, range 0~1~60kPa)There are two possibilities: 1, the ordinary pressure gauge Y-100, 0-1.6MPa; 2, membrane pressure gauge YE-100 0-1.6kPa.
Q:Function of electric contact pressure gauge
The upper and lower pressure can be set, the upper limit is reached, the power failure is stopped, the lower limit is lowered, the self starting voltage is raised, and the inner pressure is kept automatically in this range.
Q:What's the difference between a sanitary pressure gauge and a diaphragm pressure gauge?
Diaphragm pressure gauge is suitable for measuring strong corrosion, high temperature, high viscosity, easily crystallized, and medium pressure solid suspensions and must avoid measuring medium directly into the universal pressure gauge and prevent sediment accumulation and easy cleaning.Sanitary pressure gauge is also a diaphragm, is a common pressure gauge and diaphragm separator composed of a system of diaphragm pressure gauge. The utility model has the advantages of quick and convenient assembly and disassembly, easy pollution, easy cleaning, safe and reliable safety, etc.. It can meet the requirement of pharmaceutical production quality standard (GMP). In the pharmaceutical, food, drinking water, water treatment and other industries, the instrument has a hygienic requirements of the process has been widely used.
Q:What does the pressure gauge accuracy class "grade a" mean?
Accuracy class:Under normal use conditions, the degree of accuracy of measurement results of the instrument called instrument accuracy. The reference error is smaller, the instrument accuracy is high, and the reference range of error and instrument, so the use of the same accuracy of the instrument, often take the compression range range, so as to reduce the measurement error. In industrial measurement, in order to facilitate the representation of instrument quality, usually with the degree of accuracy to represent the accuracy of instrument. The degree of accuracy is maximum error of the reference is removed, and a percent sign. The degree of accuracy is an important indicator of the quality of the instrument. The instrument rating industry in China is divided into seven grades 0.1,0.2,0.5,1.0,1.5,2.5,5.0, and sign in meter scale or on the nameplate. The instrument used is called precision accuracy.Pressure meter accuracy level: 0.1, 0.16, 0.25, 0.4, 1, 1.5, 1.6, 2.5, 4, precision digital pressure gauge, and 0.05.By the way, "grade a" refers to the quality grade of this pressure gauge (Grade A or class a) and does not refer to the accuracy grade.
Q:What kind of oil is it in the oil filled pressure gauge?
Pressure meter which is filled with glycerin or silicone oil, and other can not, the general manufacturers are full of glycerol, because glycerol is cheaper, but the temperature of glycerol is relatively large, good point is filled with silicone oil.
Q:What's the quota for the electric contact pressure meter?
National unified installation budget quota - tenth volumes (automatic control device and instrument installation engineering) - Chapter I process inspection instrument - two, pressure instrument, ---10-31 electric contact pressure gauge. It includes installation, wiring and debugging.This is a basic project, you can also add a cable head production, if there are instrument protection tube, explosion-proof flexible pipe, explosion-proof sealing joint, do not forget to apply other quotas.
Q:The difference and relation between the electric contact pressure gauge and the remote pressure gauge
The use of the two is different. One is used to control the other, and the other is to send the signal to the farther end of the monitor.The electric contact pressure gauge consists of measuring system, indicating system, magnetic auxiliary contact device, shell, adjusting device and junction box (plug seat), etc.. The working principle of electric contact pressure gauge is spring pipe in the measuring system under the action of the pressure of the measured medium based on the force generated by the end of spring pipe corresponding elastic deformation displacement transmission rod through a gear transmission mechanism with the help and amplification by the fixed gear instructions (along with contact) by the measured value indicated in the table. At the same time, when the contact and set on the pointer (upper or lower) contact (break or close) instantaneous, resulting in the circuit control system can be switched on or off in order to achieve the purpose of automatic control and alarm.The remote pressure gauge is suitable for measuring the pressure of liquid, steam and gas which can not corrode the steel and copper alloy. Because the resistance transmission pressure gauge is arranged inside the sliding line resistance transmitter, so the measured values of two meters on electricity to far away from the measurement, in order to realize centralized monitoring and remote control. In addition, the pressure gauge is capable of indicating pressure in place so as to facilitate on-site inspection.
Q:Detailed explanation of working principle of Bourdon tube pressure gauge
The working principle of the spring tube type pressure gauge is spring tube; under the action of pressure, the free end displacement, the displacement of the rod drives the transmission amplification mechanism, the pointer deflection, and indicate the pressure value on the scale.Bourdon tube pressure gauge is mainly composed of a threaded joint holder, spring tube, rod, screw, gear sector, small gear, hairspring, pointer, upper and lower clamping plate, dial, case, shell etc..The function of each component in the drive amplifier mechanism:(L) pull rod - transfer the displacement of the free end of the spring tube to the sector gear;(2) the sector gear converts the line displacement to angular displacement and then passes it to the pinion and has an amplification effect;(3) the pinion drives the coaxial pointer to rotate, indicating the measured pressure on the dial;(4) - the gossamer fan gear and small gear tooth profile keep one-way contact clearance contact two gear, in order to reduce the return difference;(5) adjusting the screw - changing the position of the adjusting screw can change the length of the short arm of the sector gear, so as to change the drive ratio;(6) the upper and lower clamping plates fix the components together to form a set of transmission mechanisms.The drive mechanism, also known as the movement, is the heart of the pressure gauge. Its function is to enlarge the displacement of the free end of the spring tube so as to achieve the purpose of easy reading.
Q:Why should the pressure gauge be checked regularly?
Mainly to prevent all kinds of reasons caused by the pressure gauge is not allowed or damaged and dangerous accidents
Q:What kind of valve does the pressure gauge valve belong to?
Usually cut-off valve, ball valve, needle valve.The valve also called the valve valve is forced closed valve, so the valve is closed, the valve must exert pressure to force the sealing surface does not leak. When the medium into the valve from the bottom of the valve, the operating force required to overcome the resistance, is the stem and the packing friction and pressure generated by the media thrust force than the valve off the valve opening force, so the diameter of the valve stem, otherwise it will bend the stem top of the fault.Ball valve is the opening and closing parts (sphere) driven by the stem, and around the axis of the ball valve for rotation of the valve. Can also be used to regulate and control fluid, strong shear force between the metal seat seal V type ball valve V type ball core and welding hard alloy, especially suitable for containing fibers, small solid particles and other media.The instrument needle valve is an important part of instrument measuring pipeline system. It mainly consists of globe valve and ball valve. Its function is to open or cut off the passage of pipeline. The spool of the needle valve is a very sharp cone, which is inserted into the valve seat as if it were a needle.

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