Author - upwelltest

TIPS FOR CHARPY IMPACT TESTING MACHINE USE

Test temperature: The temperature of the laboratory for impact testing should generally be within the range of 10~35℃ (that is, the room temperature). For tests with strict requirements, such as the impact test of materials whose toughness is sensitive to temperature changes, the test should be Perform at 20°C ± 2°C.　　Sample size: Use a measuring tool with a small division value not greater than 0.02mm to measure the width, thickness, and thickness of the notch; use an optical projector [...]

2021-07-07 By News Read more...

EFT OVERVIEW & SUPPRESSION OF EFT INTERFERENCE

A common transient interference in electrical and electromechanical equipment, namely EFT, is generated by inductive devices such as relays, motors, and transformers. Generally speaking, these devices form part of the system, so interference is often generated inside the system. Designers should pay enough attention to this.      There are two mechanisms by which the switch contacts are broken down and turned on (blue light can be seen): glow discharge and arc discharge.Glow discharge       When the intensity of the electric field applied [...]

2021-07-06 By News , , Read more...
Izod impact tester

Charpy Impact Testing Machine Principle And Operation Method

Charpy impact testing machine is a commonly used material testing machine, which is mainly used for impacts of non-metallic materials such as hard plastics (including plates, pipes, and plastic profiles), reinforced nylon, glass fiber reinforced plastic, ceramics, cast stone, and electrical insulating materials. The determination of toughness is an ideal test equipment for the chemical industry, scientific research institutions, quality inspection departments of colleges and universities. Impact Testing Machine The working principle of charpy impact testing machine is: a pendulum of known energy is [...]

2021-07-01 By News , , Read more...

Plastic Melt Flow Index Tester Maintenance Method

The melt flow index tester is programmed by the microprocessor according to the standard test process, with fast heating speed and high temperature accuracy; after filling, it can quickly restore the constant temperature state. English display, automatic timing, automatic cutting, automatic calculation, automatic printing and other functions. Automatic MFR MVR Plastic Melt Flow Index Tester Reasonable maintenance method for melt flow index instrumentFirstly, check whether the working environment of the melt flow index instrument meets the working environment of the melt [...]

2021-06-30 By News Read more...

Transient Interference Of Power Supply And Its Suppression

A common type of interference is transient pulse interference . The characteristics of this type of interference noise are: large amplitude, short time, and wide frequency spectrum, which are more harmful to equipment. To solve this kind of interference, we need to use some special devices. Not only that, the power supplies we are talking about are all switching power supplies, and their components are all working in the on-off state, and internal compatibility should also be paid attention [...]

2021-06-28 By News , Read more...

Thermal Deformation Vicat Tester Application and Test Method

  Vicat Softening Point Tester     The thermal deformation tester is widely used for the measurement of thermal deformation temperature (HDT) and Vicat temperature (VST) of thermoplastics, hard rubber and long fiber reinforced composite materials.   The thermal deformation Vicat testing machine uses an intelligent controller to control the temperature, which has an ideal temperature control effect; the deformation measurement uses a grating-type high-precision dial indicator to make the measured value more stable. Operation process of thermal deformation Vicat testing machine   (1) Preparation work:Refuel the test [...]

2021-06-21 By News , Read more...
EN/IEC61000-4-2,ISO10605 EMC ESD Simulator

The Method of ESD tester mainly produces EMC disturb problems

The ESD tester is actually an electrostatic discharge generator. Static electricity is caused by the friction of two different substances, and a high voltage is formed by the accumulation of positive and negative charges on the two objects that are rubbing against each other. Man-made fibers and plastics are common triboelectric materials. When friction generates voltage, ESD problems will occur. For electronic components, electrostatic energy cannot be ignored. It can break down semiconductor components and destroy electronic circuits.   Generally, ESD [...]

2021-06-17 By News , Read more...
Izod impact tester

How to extend the service life of pendulum impact testing machine

In order to prolong the service life of the pendulum impact testing machine, hereby remind users and friends that when using the pendulum impact testing machine in the later period, we must pay attention to regular inspection and maintenance of the equipment, the purpose is also to ensure the accuracy of the test. The specific maintenance work of the pendulum impact testing machine is as follows:   Regularly check whether the bolts at the connection of each part of the equipment [...]

2021-06-09 By News , Read more...
Fabric Bursting Strength Tester

The Difference Between The Testing Methods Of Steel Ball Bursting Testing And Hydraulic Bursting Strength Testing for Fabric Testing

 In the process of taking, the fabric is constantly exposed to the top and pressure of the concentrated load and expands until it is damaged, especially the elbows, knees and other parts of the clothing. This damage is called bursting or bursting.          Because the fabric is subjected to the pressure and pressure during the wearing process, the fabric stretches longitudinally and shrinks transversely. If only the tensile breaking strength of the fabric is tested, it must be tested in the [...]

2021-06-02 By News Read more...
AATCC22: Water repellency test-spray method

AATCC22: Water repellency test-spray method

AATCC 22 Water repellency test: spray method  Purpose and scope       The standard applies to any textile fabric, regardless of whether it has been treated for water repellency. This standard can determine the water-wetting resistance of fabrics, and is not suitable for textiles treated with water-repellent properties, especially plain woven fabrics. Because the instrument is simple and portable, and the test procedure is relatively concise, this standard is particularly suitable for factory product control. Since this standard cannot measure the penetration of [...]

2021-05-26 By News , Read more...