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: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:How is the range of pressure gauges determined?
2.5MPa*3/2=3.75MPa, select the 0-4.0MPa pressure gaugeGenerally choose the maximum pressure of 1.5 times, and then according to the standard range can be selectedThe standard range is 1,, 1.6, 2.5, 4, 6, n times
Q:What is the green area of the pressure gauge on the extinguisher?
Generally, the pressure gauge GREEN indicates safety range, yellow means warning, red means danger. Green: safety range can be used; yellow: lack of pressure, need to add perfusion; red: too much pressure, dangerous, need immediate overhaul!
Q:What is the principle of setting the root valve of the pressure gauge?
First, local pressure gauges (in the PID diagram of a component named PG) installation interface are flange, flange with general HG/T20615-2009 DN20, the minimum pressure rating to Class300, Class300 is higher than that of no special requirements and process piping class agreement. Flange pressure rating less than or equal to Class600 when using the RF process, the pressure level with RJ CLASS600. In the process of vertical pipe on the diaphragm type pressure gauge will require the use of a 90 degree bend flange pressure gauge of the nozzle surface into the vertical flange, and pipe insulation shall not collide, and the vertical direction for bolt and nut construction space. 3. outside the flange surface, within the flange 150mm, set aside the space required for the long 700mm instrument installation. Two, the general pressure transmitter pressure transmitter (in the PID diagram of a component named PT) installation interface are flange, flange with HG/T20615-2009 DN20, the minimum pressure rating to Class300, Class300 is higher than that of no special requirements and process piping class agreement. Flange pressure rating less than or equal to Class600 when using RF process, pressure rating >Class600 with RJ. Single flange pressure transmitter, flange nozzle adopts HG/T20615-2009 DN50, minimum pressure level is Class300, higher than Class300, no special requirements, and process piping level. Threaded interface flange pressure rating less than or equal to CLASS600 with RF when suddenly face we installed on the pressure gauge with the cut-off valve with DN15;
Q:How to prolong the service life of the pressure gauge with live contacts?
1, the electric contact pressure gauge in the allowable conditions, as far as possible can make the upper and lower limit a little larger.2, the electric contact pressure gauge on the pressure indicator fluctuations, that is, should be in the pressure pipe to increase damping, that is, increase the buffer, such as the installation of ring pipe, properly close the small valve.3, the electric contact pressure meter reduces the current through the electric contact, the effective method is the electrical connection point through the electronic amplifying circuit (uses the triode, IC) to drive the relay.4, the electric contact pressure meter reduces the power supply voltage of the electric contact, of course, the related relay also needs to be exchanged. The RC spark suppression element is connected to the electric contact.5, the electric contact pressure gauge uses the magnetic auxiliary type electric contact pressure gauge.6, electric contact pressure gauge is through magnetic force auxiliary contact torque increases the electrical contact, has relatively high electric contact pressure gauge contact power, because the magnetic effect on the electric contact pressure gauge can increase the contact force, accelerate the speed and make contact contact, reliable contact, can eliminate the arc, can avoid contact monometers due to frequent action of vibration or medium pressure fluctuations caused by contact.
Q:What kind of oil is it in the oil filled pressure gauge?
The main purpose of the charging of the pressure gauge is to reduce the buffer of the pointer to the zero when the relative amplitude of the pressure is relatively large, so that the sensitivity of the pressure gauge can be effectively ensured. It mainly consists of two kinds of glycerin and silicone oil.Glycerol: mainly seismic action;Silicone oil: it is also earthquake resistant, but silicone oil is more resistant to low temperature than glycerin. If it is outside -20 DEG C, the glycerin will crystallize, but the silicone oil will also make the instrument work properly.
Q:Can the pressure gauge be reversed installed?
1. The installation position of the pressure gauge shall comply with the requirements of the installation state. The dial shall not be placed horizontally, and the installation position shall be convenient for the staff to observe.2, the pressure gauge installation and pressure point distance should be as short as possible, to ensure good sealing, leakage phenomenon can not occur.3, in front of the installation of pressure gauges should be buffer; to facilitate inspection, at the instrument should be equipped with shut-off valve; when the media is dirty or pulse pressure, you can use filters, buffers and regulators gas.The pressure gauge can be installed from any angle!
Q:What does the pressure gauge 1% mean?
Accuracy 1% means the full range of the pressure meter, the error range is 1%, plus plus or minus.For example, a 1MPa pressure gauge with a precision of 1% means that the range of this meter is plus or minus 0.01MPa.Calculation method is: range * accuracy grade
Q:What pressure gauges are used in a pressure vessel?
Normally, pressure vessels do not need to be fitted with pressure gauges.But if it really needs to be installed, it depends on how it is used. For example: instantaneous pressure may reach 0.4MPa, and the normal working pressure is 0.05MPa, then choose 0-0.6MPa pressure gauge on it. If there is no instantaneous pressure, use the 0-0.1MPa pressure gauge.
Q:Accuracy grade of pressure gauge
China's general industrial pressure meter is divided into 4 accuracy levels, in line with the JJG52-1999 "Bourdon tube general pressure gauge, pressure vacuum table and vacuum meter" verification regulations, the pressure table prepared by the allowable error. These 4 levels of accuracy are: 1, 1.6, 2.5, and 4. Allowable error (calculated according to the percentage of the upper limit of measurement) is 1%, 1.6%, 2.5%, 4%, respectively.China 2005 new digital pressure meter verification regulations promulgated and implemented, in line with JJG875-2005 "digital pressure gauge verification regulations.". The accuracy of the pressure is respectively 0.01%, 1.6%, 0.02%, 0.05%, 0.1%, 0.2%, 0.5%, 1%, and so on.

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