WDW Series Computer Control Type Electronic Universal Testing Machine(Single Arm Type)

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Product Description:

、Main functions
 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 metheds 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  
This machine equips alternating servo motor for driving crosshead and imported photoelectric encoder for displacement measure. This machine is accompany with the digital multi-channel closed loop control system which applicates the latest moitoring and control systems with lots of advanced profassional and technical development. 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. It can realize three close 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.  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 oprates easily and reliably.
、Technical Specification:









Measuring range of force (kN)







Accuracy of testing force


Resolusion of testing force

1/20000 of maximum testing force

Relative error of displacement


Resolusion of crosshead displacement measurement

0.01 mm

Speed range of crossbeam

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

Valid testing space (mm)


Power supply



Working environment

10~30℃, relative humidity≦80%

Main configuration

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

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

Overall dimension of host machine (mm)




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Q:What is the calibration cycle for the pressure gauge / thermometer / flowmeter? Is there a standard to check?
Provisions concerning the period of verification:1 national inspection category (a total of 4 categories: trade settlement related instruments, security related instruments, medical, health related, environmental related) measuring instruments in accordance with national regulations, and strictly enforced. For 1 years, but also for half a year.2 non - strong measuring instruments, the use of units generally can determine its own calibration cycle. Can also be regularly checked, or one-time verification. Generally ranging from 1 to 3 years. Just do it yourself. If it is enterprise, it is better to use document to stipulate.
Q:What's the difference between the pressure gauge and the bellows pressure gauge?
The difference between the pressure gauge and the membrane pressure gauge is as follows:A pressure gauge is a general term for all tables, including membrane pressure gauges;The bellows pressure gauge can only be used to measure gas or micro pressure, while the pressure gauge can measure a lot of media or high pressure;The accuracy level of a pressure gauge is divided into 1.6 grades and the 2.5 grades are most common.The diaphragm pressure gauge has only 2.5 accuracy.The pressure gauge pressure units can be MPa, kPa, bar, mbar, PA, kg/cm - etc..The diaphragm pressure gauge is only kPa to show.Pressure gauges are usually spring tube as the inner core, the work is relatively rough.Membrane pressure gauges are usually made of diaphragm material to make the inner core, and the workmanship is more accurate.Old Han Tel: 15610939997, do not understand questions, if solved, hope to adopt.For pressure gauges and membrane pressure gauges, they have a delicate relationship. Pressure gauges are a big kind. Bellows pressure gauges are one of them.
Q:What is the maximum working pressure 6Mpa? How much do you want to fit the pressure gauge?
Select 0-10MP.The pressure gauge is usually 1/3-1/2 larger than the maximum working pressure. When the pressure fluctuates greatly, 2-3 times of the rated working pressure should be chosen.The reason for this selection is that:1 keep the measurement indication clear;2. Head work in non limit state, reduce head mechanical fatigue, extend service life;3. Prevent peak work pressure damage meter.
Q:I want to use a frequency converter and a remote pressure gauge to control a submersible pump, using the on-off control, constant pressure water supply, how to connect and set up
It is not suitable to control the frequency converter directly with the contacts of the remote pressure gauge. First of all, the contact jitter, will damage the inverter, and secondly, the number of contacts is not enough.The remote contact signal shall be first entered into the PLC. After finishing, the starting signal of the frequency converter shall be uniformly sent to the PLC. PLC can judge or delay method to control the frequency converter start and stop pump action, to achieve not only switch control water pump, but also soft soft stop pump effect. As for the wiring, relatively simple, PLC contact is connected to the frequency converter to start, stop contact. Of course, the water pump protection circuit is completed. Logical control is done by PLC.
Q:What's the effect of the rubber plug at the top of the shock gauge? What's the effect of not cutting off?
The role of the rubber plug at the top of the shock pressure gauge:Rubber block is to prevent silicone oil (glycerin) leakage, the pressure inside the oil is filled with silicone oil (glycerin).Rubber stoppers, sometimes called safety plugs, leak protection, such as excessive internal pressure, plug will pop up, so that the glass is not easy to break.After the pressure gauge is installed, a small hole should be inserted into the rubber to make it connect with the atmosphere, otherwise it will affect the measuring accuracy.Vibration proof pressure gauge suitable for vibration occasions. Silicone oil is resistant to low temperature, glycerol is seismic effect, can make the measurement more accurate, and prolong the service life.The effect of no cuts: high pressure gauges are no problem. It's best to cut off or poke a small hole at low pressure.
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:When the pressure vessel is in hydraulic test, is the pressure gauge container good or the following?
The answer is: absolutely different!!Because all media have density p, and the pressure vessel exists in the upper and lower positions, there is a height difference h between the upper and lower positions, and G=p*g*h is obtained according to the density formulaTherefore, the two readings indicate that the values are inconsistent, but the pressure is greater and the height difference is small. This part of the pressure value can be neglected.
Q:Diaphragm pressure gauge
Diaphragm pressure gauge measuring element type is "spring pipe + diaphragm", the diaphragm is only isolated transmission components, rather than sensitive components; diaphragm pressure gauge directly to the diaphragm as a sensitive element, and no longer use spring tubeThe diaphragm meter by spring tube range limit, the minimum range is usually only 0.1MPa or 60kPa; diaphragm pressure meter is usually used for micro pressure, the minimum can be 1kPa to 2.5MPa. two, the highest range have overlapping and complement each other.
Q:What's the meaning of diaphragm pressure gauge YTP-100?
This is different manufacturers to their own product name is different. For example, I now units: steel YTF pressure gauge; seismic YTN; diaphragm diaphragm YTP; YTF.................................. but you also don't be fooled, but YTF and YTP are the same. The difference is that a diaphragm is added to the bottom, and different diaphragm models are written separately at the time of booking.
Q:Do pressure gauges need to be used in atmospheric hot water boilers?
There is no need to install pressure gauges in the atmospheric hot water boiler, but the piping system is best installed, because the system circulation should be monitored. Also, the furnace body and the system line shall be equipped with thermometer.

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