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103 news releases added by OKmarts Industrial Parts Mall

What does the Tire Pressure Sensor Fault Mean?

Dec 30, 2021 | Automotive sensors are the fastest growing and most used type in recent years. The development of the automotive industry stimulates the improvement of automotive pressure sensors. Advanced manufacturing and process technology strengthen the performance of sensors, and tire pressure monitoring is increasingly accurate.

Figure 1: The tire pressure monitoring system.

Car AC Compressor Troubleshooting-- Best Suggestions

Dec 30, 2021 | Using a straight edge and a feeler gauge to examine the flatness error between cylinder head, cylinder block, crankcase and bottom cover, which should not be more than 0.05mm, otherwise, you should grind it. If there are cracks in the cylinder block and cylinder head through observing or knocking, replace them with new ones.

Figure 1: Cutaway 3D model of a car AC compressor.

Where is Servo Motor and Servo Drive Used?

Dec 29, 2021 | With the development of information, communication and automation technology, a wide variety of automatic control devices have been used in industry production and daily life of modern world. As one of the most common devices for automatic control, servo system, constituted by servo motor and servo drive has been widely used in our daily life. With our article here, you can get a deeper understanding where exactly can servo motor and servo drive can be used.

Figure 1: Servo motor is a core part of servo system.

Basics of Servo Motor You Should Know

Dec 29, 2021 | Servo control refers to the effective control of the position, speed and acceleration of certain object to meet a certain purpose. It is one of the most important control methods in modern industry. Servo control system has been so widely used in industry, but do you know the basic knowledge about servo control? Check out this article to learn about how servo control system works and setting up tips.

How to Replace Refrigerator Compressor

Dec 28, 2021 | If the refrigerator compressor is broken and can no longer be repaired, you need to buy a new one to replace it. When replacing, you need to follow the correct steps. Then how to change the refrigerator compressor? The following are the detailed steps.

Figure 1: A lot of neatly arranged compressors.

When You Should Use an Absolute Encoder - Pros and Cons of Different Absolute Encoders

Dec 28, 2021 | As is known to us, rotary encoders consist of incremental encoders and absolute encoders. And absolute encoders are much more expensive than incremental encoders. In fact, both two types of encoders are used for position measurement. So what's the point of using an absolute encoder? For distance measurement applications, both incremental and absolute encoders can be chosen - from a technical point of view. The advantages of absolute encoders are reflected in accuracy and performance, while incremental encoders seem more economical and practical.

6 Reasons for Refrigeration Compressor Not to Start

Dec 27, 2021 | When speaking of air conditioners, everyone is familiar with them. Especially in the hot summer, we would not know how to live without it. But when it comes to refrigeration compressors, many consumers are not particularly clear. In fact, the refrigeration compressor is an important part of air conditioners and refrigerators, and its performance and quality directly determine the cooling effect of them. The following is an introduction to the types of refrigeration compressors.

Figure 1: Refrigerator compressor unit.

Why Refrigeration Compressor Oil Deteriorates & How to Add Oil

Dec 27, 2021 | The lubricating oil used in a refrigeration compressors can lubricate the friction surface, reduce the friction work, friction heat and avoid wear of the compressor motor. Besides, filling the sealing part with oil can ensure its performance and prevent the leakage of refrigerant. Here are four reasons why the oil of refrigeration compressor deteriorate.

Japanese Giant Mitsubishi Heavy Industries Goes Into Central Air Conditioners for Home Use

Dec 26, 2021 | In recent years, it's probably difficult for people to choose between central air conditioners and split air conditioners for home use. In fact the time that central air conditioners are used for home refurbishing is not long yet. To many people, central air conditioner is an integrated indoor temperature control solution. Compared with the traditional split air conditioner, it has higher efficiency, lower energy consumption, and at the same time, it can save indoor space and maintain the integrity of the interior decoration. Regarding its installation, central air conditioner is installed in hidden places in the room, mostly attached to the ceiling, which is much more beautiful than cabinet type or split hanging type air conditioner.

Figure 1: Air outlet of a central air conditioner is installed on the ceiling of a house.

High Temperature Mulfunction of Screw Compressor and Solutions

Dec 26, 2021 | 1. Reasons of High Temperature Breakdown 1.1 Environmental Factors Ambient temperature may not be the main cause of high temperature shutdown, but it is often the inducement of compressor high temperature shutdown. Generally, technicians have a design operating environment temperature (30-40 ℃) when designing compressors. When the air compressor is operated under the designed operating environment temperature, its maximum temperature is close to the protection temperature of the air compressor.

Figure 1: Maintenance staff works on an exterior unit of a central air conditioner.

Where is the Throttle Position Sensor Located?

Dec 24, 2021 | The throttle Position Sensor (TPS), located on the butterfly spindle, is operated by the throttle, and its installation varies according to the structure. For a traditional mechanical cable throttle, the throttle position sensor is usually installed on the side of the throttle body in the form of an independent component. And its rotation openness is driven by the throttle shaft, as shown in figure 2. For the commonly used electronic throttle, the throttle position sensor is integrated into the electronic throttle control component, as shown in figure 3.

Figure 1: A throttle position sensor in the car.

What's the Difference between Semi-Hermetic Compressors and Hermetic Compressors?

Dec 24, 2021 | In the hermetic compressor, the motor and the compressor share the main shaft (reciprocating type), and the compressor unit is suspended in the housing by spring. The casing is divided into upper and lower parts. After the internal components are assembled, the upper and lower interfaces will be sealed by welding. The suction pipe, exhaust pipe, and process pipe are drawn out of the outer shell.

Figure 1: A compressor is on the ground.

Piston Compressor Basics - Structure, Working Principle, Advantages and Disadvantages

Dec 23, 2021 | As both manufacturers and end customers know, in a refrigeration or air conditioning system, the compressor is the equipment core by continuously sucking back and exporting refrigerant. Once the compressor breaks down or stops working, the whole cooling system will be interrupted. Piston compressor is widely used in large and medium-sized cold storage. Here we will explain in detail the structure, working principle, advantages and disadvantages and common fault diagnosis of piston compressors.

Five Pros of Refrigeration Compressor of Mitsubishi Electric

Dec 23, 2021 | For refrigeration products, high efficiency and energy saving are the constant pursuit and breakthrough of technology. In cooling industry, Mitsubishi Electric has been occupying a significant place. With article, we are going to talk about five advantages of refrigeration compressor of Mitsubishi Electric to allow everyone to understand the technologies of Mitsubishi, and how they have made Mitsubishi a big shot in HVAC industry worldwide.

Figure 1: Mitsubishi Electric air conditioner is applied for home use

How to Test a Mass Flow Sensor?

Dec 22, 2021 | The mass flow sensor, or air flow sensor is one of the important sensors of the electronic fuel injection engine. It is installed between the air filter and the intake hose to measure the intake volume of the engine cylinder and adjust the fuel ratio according to it. The mass flow sensor converts the inhaled air flow into electrical signals and sends them to the electronic control unit (ECU). As one of the basic signals to determine the fuel injection, it is a sensor that measures the air flow of the suction engine. So if you want to test it, how should you do? Let's start it.

Figure 1: Mass flow sensor cleaning.

How to Calibrate a Pressure Transmitter Before Use

Dec 22, 2021 | Pressure transmitter is a kind of commonly used measuring instrument, which can convert the physical parameters such as gas and liquid sensed by load cell into standard signal output. It has the advantages of measurement, stable performance, high sensitivity and easy operation.

Figure 1: ABB Transmitter 264DSFSHB2B3

A Quick Look at HMI Touch Screen in Industrial Scenes

Dec 21, 2021 | In modern society, mobile phone is almost a necessity for everyone. When your mobile phone is not around, you may easily feel anxious as if something is missing, which is called nomophobia. In the past, people used to check if they had taken money when they went out. But now, mobile phone is the thing people must take. As is known to us, as long as you take a mobile phone, it's easy to get food, clothes, and to take transport. Look at our mobile phones, you will find almost all of them are equipped with touch screens now, which are much better than the early keyboard for using.

Battle of Giants - Differences of PLC by Siemens, Allen-Bradley and ABB

Dec 21, 2021 | Many industrial equipment manufacturers in the world are producing PLC. The product and market competition between different companies is unavoidable. While top companies receiving great popularity for their products, the clashes and differences between them are always notable too.

How to Connect Rotary Encoder with Arduino Board UNO

Dec 19, 2021 | Rotary encoder is an input device to help users interact with the system. It looks like a radio potentiometer, but it's unique that it outputs a series of pulses. The encoder rotates in small steps so that it is very suitable for many applications such as stepper / servo motor control, serial navigation menu, and increasing / decreasing digital values. In this article, we will have a brief look at different types of encoders and how they work, and next get a closer look at how to connect a rotary encoder with Arduino board UNO. By controlling the value of integer through rotary encoder, we will display it on LCD 1602. You will be familiar with using rotary encoders for your project. Let's get start!

Basics of Encoder and Orthogonal Coding

Dec 19, 2021 | Encoder is a kind of electromechanical equipment, which can be used to measure the movement of machinery or the target position of machinery. Most encoders use optical sensors to provide electrical signals in the form of pulse sequences, which can be converted into motion, direction or position information in turn.

What to do if Your Compressor is in Reverse Rotation

Dec 17, 2021 | As we know, the operation of the internal compression structure of the refrigeration compressor has a fixed direction. First of all, we should make it clear that the reverse rotation of the compressor is adverse. Scroll refrigeration compressors can only compress in one direction of rotation. Single-phase compressors always start and run in the correct direction, except in the case of instantaneous power failure. The direction of rotation of the three-phase compressor is determined by the phase sequence of the power supply, so there is a chance that the compressor will rotate reversely.

How to Reduce Noise of Air Compressor?

Dec 17, 2021 | Air compressors can provide stable air flow with little pressure fluctuation, which has the advantages of stable rotation and high efficiency. It is the auxiliary production facility of many industrial enterprises and plays an important role in production. As an instrument of loud noise in the first place, the strong noise produced by an air compressor during operation may deteriorate the working conditions and living environment of people. How to reduce the noise of air compressors is a common problem in industrial noise control. This article will give you some solutions. First of all, you need to find out the source of the noise.

What Data Can a Human Machine Interface (HMI) Tablet Collect?

Dec 16, 2021 | Due to the shortage of energy supply, and increasingly significant environmental problems, new energy resources have been gradually known to people. Wind energy is a type of renewable clean energy. The development of wind power generation is of practical significance to the adjustment of energy structure, energy conservation and emission reduction, reducing environmental pollution and improving the ecological environment. A human machine interface (HMI) tablet can offer a three-tier monitoring system including wind turbine monitoring, single wind farm monitoring and wind farm cluster monitoring to empower the work of wind power generation.

Figure 1: Fuji HMI GD-80E01MJ-B

How Does Encoder Measure the Motor Position Accurately?

Dec 16, 2021 | Encoder is a kind of equipment that can compile and convert signals or data into signals that can be used for communication, transmission and storage. Encoder converts angular displacement or linear displacement into electrical signal, which is called code disk and code ruler respectively. It is a common motor positioning equipment in industry, which can accurately test the angular displacement and rotation position of the motor.

Figure 1: Yaskawa Encoder ECN1113

Top 10 Sensors Types for Industrial Internet of Things

Dec 15, 2021 | The Industrial Internet of Things (IIoT) is a major trend in the processing and manufacturing industry. GE clearly proposed the core concept of the Industrial Internet of Things, which was explained by many people as the development strategy of the British processing and manufacturing industry. And then the popularity of GE's Predix platform, developing into the release of the Mindsphere, an industrial production network platform, by Siemens PLC. Later, several of China's processing and manufacturing giants have released the first industrial network platform, increasingly drawing attention to IIoT.

Figure 1: IIoT sensor.

Guide of Siemens Pressure Transmitter: Features, Working Principle and Troubleshooting

Dec 15, 2021 | Siemens pressure transmitter is a kind of equipment which converts pressure into pneumatic signal or electric signal for control and remote transmission. It can convert the physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4 ~ 20mADC), which can be supplied to the secondary instruments such as indicating alarm instrument, recorder and regulator for measurement, indication and process adjustment.

Get the Insights of Future Trends of HMI from Delta HMI

Dec 14, 2021 | HMI is the device connects the user and the machinery system. It is the medium of information transfer and exchange between people and machines. Since the first button switch was developed, man-machine interface monitoring system has become an essential part of industrial production. No matter from the point of view of the commercial competitiveness of products or the development prospect of science and technology, there will be two trends in the development of HMI products.

How to Add Encoder to Stepper Motor

Dec 14, 2021 | When the current flows through the stator winding, the stator winding produces a vector magnetic field. The magnetic field will drive the rotor to rotate an angle, so that the direction of magnetic fields of the rotor is consistent with that of the stator. When the vector magnetic field of the stator rotates an angle, the rotor also rotates at an angle with this magnetic field. Every input of an electric pulse leads the motor to rotate at an angle to advance one step. The angular displacement of the output is proportional to the number of pulses input, and the speed is proportional to the pulse frequency.

Figure 1: Inner components of a stepper motor.

Causes of Oil Separator Burning

Dec 13, 2021 | During the use of your air compressor, there could be tricky oil separator burning failures. So this article will tell you the causes and solutions as well as some cases.

Figure 1: Oil separators of air compressors

7 Ways to Save Energy on Your Air Compressor

Dec 13, 2021 | As one of the power sources of manufacturing and production enterprises, compressed air requires continuous operation of equipment to ensure the stability of air supply pressure, which is also the basic condition of production and operation of enterprises. The air compressor unit, the main manufacturing equipment, is the core machine to undertake this task, and its continuous and reliable run ensures its own stable operation. Since it is a piece of running equipment, it needs a power supply to operate, large power consumption is the core of cost increase.

Figure 1: An air compressor is at a construction site.

Four Things about the CT (Current Transformer)

Dec 12, 2021 | The CT (Current Transformer) is a component used to detect current signals, which is based on a transformer. Compared with Hall devices, it is cheaper, but due to the exciting current, the detected current will be wrong in principle. But for the applications that do not require high-accuracy current, a current transformer can play an important role. This article will introduce the use, the model, the method to avoid saturating and its selection.

Figure 1: Current transformers.

Scroll Vs. Rotary Compressor for AC

Dec 12, 2021 | Scroll Compressor The scroll compressor was invented in 1905 by a Frenchman, Copeland. He set up Copeland company in the United States, where water air conditioners are mostly used, so the compressor is mainly used in air source heat pump or ground source heat pump, as well as other commercial fields. Copeland was acquired by Emerson Electric in 1986, so it is now a unit of Emerson, which makes precision air conditioners as well as compressors. Now Emerson has also launched a new type of combined supply system at a high price. It is like the fluorine air conditioner. It may affect HVAC companies with technical strength, because the new system can be developed by these companies. Whether the system is good or not depends on the technical strength of the HVAC company, unlike the quality of fluorine air conditioner guaranteed by the selected brand.

Figure 1: The engineer is installing the units for the air conditioner.

Introduction to the Principle, Types and Advantages of Gas Sensors

Dec 10, 2021 | The gas sensor is used to detect specific gases in a certain area and continuously measure the concentration of gases as well. In the areas of coal, petroleum, chemical, municipal, medical, transportation, family and other safety protection, gas sensors are often used to detect the concentration or presence of gases that are flammable, toxic, or their oxygen consumption. Gas sensors are often indispensable in safety systems thanks to the detection of gases around.

Top 10 Brands of HMI Worldwide

Dec 10, 2021 | HMI is the abbreviation of human machine interface, which is also known as user interface. It is the medium of interaction and information exchange between the system and users. It can complete the work of information transformation between the internal form of machinery and the acceptable form of human beings. Wherever there's human-computer information exchange, there's HMI.

Figure 1: Pro-face HMI product with brief company description

Factors to Consider When Selecting Rotary Encoders

Dec 09, 2021 | In a series of modern machinery industries like construction, building materials, mining, engineering vehicles, metallurgy, water conservancy, port machinery and other fields related to large heavy equipment, the reliability and safety of equipment comes first in process control. For safety requirements, reliable feedback of encoder signals are directly related to control safety and reliability. Unreliable and inappropriate encoder selection will lead to frequent equipment debugging and maintenance. As a result, labor costs of debugging and maintenance may rise hugely, and on-site service engineers will never be enough.

Differences Between Smart Pressure Transmitter and Analog Pressure Transmitter

Dec 09, 2021 | Pressure transmitter is composed of single chip microcomputer and micro displacement (differential) pressure sensitive element, which can complete multi-function detection and conversion from non electric quantity to electric quantity.

Air Compressor Troubleshooting and Solutions

Dec 08, 2021 | With the development of motor technology, compressor is considered as "general machinery", especially in coal chemical industry, machinery industry and other industries. For distance measurement applications, both incremental and absolute encoders can be chosen - from a technical point of view. The advantages of absolute encoders are reflected in accuracy and performance, while incremental encoders seem more economical and practical. A correctly working compressor determines the safe operation of the whole air conditioner or refrigerator. For example, during the operation of piston compressor, there would be burnout, oiler failure or low pressure and gas shortage. Once these problems occur, the appliance would not work right. How to quickly and accurately detect and solve these problems in time affects the compressor operating rate and product output. This article will analyze all common faults of AC compressors and provide solutions.

How Does a Refrigeration Compressor Work? With Animation for Each Type

Dec 08, 2021 | Refrigeration compressor is a kind of driven fluid machinery, which promotes low-pressure gas to high-pressure gas and is the heart of refrigeration system. The refrigeration compressor sucks the refrigerant gas of low temperature and low pressure from the suction pipe, then drives the piston to compress the gas through the motor operation, and finally discharges the refrigerant gas with high temperature and high pressure to the exhaust pipe to provide power for the refrigeration cycle, so as to complete a refrigeration cycle: compression → condensation (heat release) → expansion → evaporation (heat absorption) Compressors can be divided into piston compressor, screw compressor, centrifugal compressor, etc.

What are the Major Causes of Variable Frequency Drive (VFD) Damage?

Dec 07, 2021 | Variable frequency drive belongs to electronic products, which were composed of many components. An electronic product will not correctly work if any component goes wrong. The Common failures of frequency converters are overvoltage, overload, overcurrent and overheating. They are generally caused by improper use and the operating environment. Meanwhile, there's a particular service life for electronic products. The aging of the product will be more evident as the use of time increases.

Principles and Differences of 2-wire, 3-wire, and 4-wire Transmitters

Dec 07, 2021 | 2-wire, 3-wire, and 4-wire transmitters refer to the transmitters whose outputs are analog DC current signals. They have quite many differences in working principles and structures, not only limited to wiring forms of the transmitters.

Figure 1: Wiring test of 3-wire transmitter.

Study on the Performance of Single Phase AC-DC-AC Inverter Circuit

Dec 06, 2021 | At present and in the future, the maintenance of the electrical control equipment, VFD (Variable Frequency Drive) will become the professional knowledge that all electricians need to master. As a reliable supplier of leading brands of VFDs for many years, OKmarts now shares ten simple and easy maintenance methods to the majority of VFD maintenance technicians. Hopefully these experience can help you in the maintenance of VFDs.

Different Types of Pressure Transmitters

Dec 06, 2021 | Pressure transmitter is a kind of instrument which can convert pressure variable into standard output signal. There is a functional relationship between the pressure variable and the output signal of pressure transmitter. According to different working principles and measuring methods, pressure transmitters can be classified into the following 11 types. According to different methods of output signals, transmitters can be divided into current output type and voltage output type.

Figure 1: Rosemount pressure transmitter installed on a factory pump.

How to Choose Pulse, Analog and Communication Control Modes of Servo Motor

Dec 05, 2021 | There are three control modes of servo motor: pulse, analog and communication. In different application scenarios, how should we choose the control mode of the servo motor?

Refrigerator PTC Relay Wiring Method

Dec 05, 2021 | The PTC (positive temperature coefficient) relay is directly connected in series with the secondary winding (start winding) and in parallel with the main winding of the motor. When AC 220V is applied to the two windings, a phase difference will be generated due to phase separation, thus forming an elliptical rotating magnetic field and generating a starting torque to drive the normal operation of the motor. After that, because the PTC relay is under a high resistance state, the starting circuit is nearly disconnected, and only the running winding drives the motor to run.

Figure 1: Refrigerator PTC relay.

Why We Use VFD - Efficiency and Performance

Dec 03, 2021 | The Variable Frequency Drive (VFD) is a device widely used to convert the constant voltage of an autonomous AC power source into a variable voltage for controlling the torque and speed of the motor. They are ideal for motors that drive loads on mechanical equipment. A VFD offers higher efficiency than simple inline motors, as well as a degree of control not available with simple drive motors. These factors can save energy costs, improve production performance and extend motor life.

Use of Differential Pressure Transmitter and Common Troubleshooting

Dec 03, 2021 | Differential pressure transmitter is a kind of pressure measuring instrument widely used in all kinds of chemical industry. Working principle of differential pressure transmitter is as follows. The differential pressure from the two-sided pressure pipes acts directly on the two-sided isolation diaphragm of the differential pressure transmitter sensor, and is transmitted to the measuring element through the sealing fluid in the diaphragm. The measuring element converts the measured differential pressure signal into the corresponding electrical signal and transmits it to the converter. After amplification and other processing, it becomes the standard electrical signal and then is output.

Calibration of Rosemount Transmitter

Dec 02, 2021 | When adjusting the transmitter, please turn off the protection setting, which is usually the red switch in front of the meter and its status may be ON or OFF. If it is ON, you will not be able to make the calibration adjustment.

Data analysis of air compressor energy consumption and heat recovery benefit

Dec 01, 2021 | Data analysis of air compressor energy consumption and heat recovery benefit

How to judge the freezer has aged

Dec 01, 2021 | ong-term use of the freezer will cause some large and small problems. The freezer in many people's stores has gradually become aging for some years. In this hot summer, if the commercial freezer in your store suddenly breaks down, is it particularly uncomfortable? The maintenance masters have been late, and the repair prices are very expensive after they come, and many black-hearted repairmen in the freezer industry have to replace many parts for some minor problems, and replacement parts can easily cause hidden dangers. Today, the editor will teach you how to check whether the freezer is aging?

With COVID-19 Outbreak, Will Sensors be Next Hot Market in Medical Industry?

Dec 01, 2021 | Last year was a very hard year with the COVID-19 epidemic, everyone saw the important role of the medical device industry. Meanwhile, the shortage of medical products caused by the epidemic has made medical industry a hot market worldwide. It is found that sensors and its relevant products received a lot of attention since they can enhance the functions of medical devices and ensure better treatment for patients. The application of sensors in the medical industry is very extensive and crucial. The use of sensors can greatly improve the safety, reliability and stability of medical equipment. Common fields that need sensors include respiratory equipment, anesthesia equipment, diagnostic and monitoring equipment, etc.

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