Author - upwelltest

How To Improve Electronic Equipment’s Electromagnetic Compatibility

The electromagnetic interference and response process generated by any electronic device can be used to describe the source of interference (test signal generator) by radiation and conduction, and the characteristics of the response receiving device can be described by radiation sensitivity and conduction sensitivity. Therefore, all electromagnetic The interference suppression method can start from the following three aspects: Suppress electromagnetic interference sources; Cut off the electromagnetic interference coupling path; Reduce the sensitivity of electromagnetic sensitive devices. EMC Testing Device ESD EFT Surge combined [...]

2021-09-29 By News Read more...
Izod impact tester

IZOD IMPACT TESTING MACHINE MAINTENANCE AND COMMON PROBLEM SOLVING METHOD

The Izod impact testing machine is a semi-automatic control testing machine with simple operation and high work efficiency. The swing, impact and placement are electrically controlled, and the remaining energy after breaking the sample can be used to automatically swing the pendulum to prepare for the next test. It is especially suitable It is used in laboratories that continuously do impact tests and metallurgy, machinery manufacturing and other industries that do a large number of impact tests. The cantilever [...]

2021-09-15 By News , Read more...

TEXTILES TENSILE BREAKING STRENGTH TESTING MECHANISM AND INFLUENCING FACTORS

(1) Test methods and indicatorsTest MethodWoven fabrics, non-woven fabrics: ripped yarn strip method, grab sample method, shear strip method Knitted fabric: trapezoidal test strip, loop test strip. When the rectangular knitted fabric sample was stretched, the stress at the jaws was particularly concentrated, causing the sample to break near the jaws.  Representation index(1) Breaking strength (N) The main index for evaluating the intrinsic quality of fabrics can also be used to evaluate the influence of washing, abrasion and finishing on the intrinsic [...]

2021-09-06 By News , , Read more...
hydrostatic pressure testing machine

Precautions For Use And Maintenance Of Pipe Hydrostatic Pressure Testing Machine

When using the pipe hydrostatic pressure testing machine, in addition to some precautions, there are also maintenance methods for the pipe hydrostatic pressure testing machine. The pipe instantaneous blasting test refers to a given section of plastic pipe sample, quickly and continuously applying liquid pressure to the inside of the sample, so that the sample ruptures in a short time. Read the pressure value when the sample is broken and calculate its hoop stress. The pressure control system of the [...]

2021-07-29 By News , Read more...

Melt Flow Index Tester Working Principle

Melt index meter The flow rate meter uses a high-temperature heating furnace to make the measured object reach a molten state under a specified temperature condition. The test object in this molten state is subjected to an extrusion test through a small hole of a certain diameter under a prescribed weight load. In the research of plastic production and scientific research units of industrial enterprises, the “melt (mass) flow rate” is often used to express the fluidity, viscosity and [...]

2021-07-12 By News Read more...

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...