1. The safety barrier should be installed in a safe place, and the environmental conditions meet the requirements of the "application conditions" in the "Safety Gate Selection Sample".
2. The connecting wires of the intrinsically safe end (blue end) and non-intrinsically safe end circuits of the barrier safety barrier should be laid separately in the assembly duct, and independent protective sleeves should be selected for each. No other power cords are allowed in the wiring duct on the intrinsically safe side, including the power cords used in the intrinsically safe circuit.
3. The conductor leading to the risk place should be an intrinsically safe conductor with a blue symbol, the soft copper area of the conductor should be greater than 0.5mm2, and the dielectric strength should be greater than 500V.
4. Before powering and debugging the barrier safety barrier, it is necessary to pay attention to whether the model, wiring method, and line polarity of the barrier safety barrier comply with the rules in the planning and product requirements, otherwise it may cause damage to people and equipment.
5. It is strictly forbidden to test the dielectric strength between the terminals of the barrier safety barrier with a megohmmeter. If you want to check the dielectric strength of the system, you should first disconnect the wiring of all barrier barriers, otherwise it may cause damage to the internal circuits of the barriers.
6. Before programming the safety barrier on site, it is necessary to disconnect all wiring before connecting to the programmer, and then energize the programming, otherwise it may cause adverse consequences.
7. When planning, installing, operating, and maintaining barrier safety barriers, the instructions in the operation manual of this product and the "GB3836.15-2000 Electrical Equipment for Blasting Gas Environments Part 15: Electrical Installations in Risk Locations (Except Coal Mines)" and "G058-1992 Planning Code for Electricity Installation in Blasting and Fire Risk Environments" should be complied with.
8. The appearance of the site connected with the barrier safety barrier shall be selected by the relevant explosion-proof inspection department recognized by the state for explosion-proof test and the appearance of the explosion-proof certificate.
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Anti-jamming technology for sensors – we are blessed
1. Shielding skills
Containers are made from metal materials. Wrapping circuits that require maintenance between them can effectively prevent the disturbance of electric or magnetic fields, which is called shielding. Shielding can be divided into electrostatic shielding, electromagnetic shielding and low-frequency magnetic shielding.
2. Electrostatic shielding
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Problems with differential pressure sensors – Blessing
1. Temperature
Excessive temperature is one of the common causes of differential pressure sensor failure, as there are many components of the differential pressure sensor that can only function properly within the specified temperature scale. During installation, if the sensor is exposed to temperatures beyond these temperature scales, it may be exposed to ...
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What is Pulse Ranging Technology (PRT) – a sensor
PRT (Pulse Ranging Technology) stands for Pulse Ranging Technology, which is currently the most accurate industrial-grade process used to measure intervals. By using this direct measurement method, the measurement range from a few centimeters to several hundred meters can be accurately recorded.
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Test method for sensor output
1. Test for NPN output sensor
The NPN sensor output, also known as OC gate output, is based on the principle of open collector output of a transistor.
The principle of NPN type OC gate output is whether the output of the NPN transistor and GND are short-circuited. When the transistor is turned on, the output and GND ( ...
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The FDH-1 simplifies bus installation
1. Mastery: Take control of your bus
The handheld bus diagnostic device FDH-1 can be regarded as an increasingly intelligent multimeter. It only needs to press a button to quickly view any network segment. And it can work independently, which is a good addition to the engineer's stuff box.
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The photoelectric switches are simply classified
An important function of the photoelectric switch is to be able to handle changes in the intensity of light: the light beam is changed by using optical components in the transmission medium; Use a beam of light to reflect objects; Instantaneously returns the light emitted by the beam over a long distance.
The photoelectric switch (photoelectric sensor) is a photoelectric proximity on...
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Choosing the right level switching conditions – we are blessed
In order to select the best liquid level sensor, we need to understand not only the characteristics and state of the liquid to be measured, but also the advantages and limitations of different detection methods, so as to be able to select the most suitable sensor. Here are some of the most common detection technologies on the market today.
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Tips and tricks for using sensors – a blessing
Tip 1 – Start with the bus stuff
As a first step, the engineer should use the method of first interfacing the sensor to constrain the ignorance through a bus thing. A bus thing connects to a personal computer (PC) and then to the sensor for I2C, SPI or other ...
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The reason why analogue sensors are interfered with – we are blessed
1. The PCB layout board touches the problem, and when the imitation signal is routed, the imitation signal is not wrapped with imitation, and it is even possible that the signal line and then directly go to the power line, which is easy to receive disturbances.
Solution: When it is a board, wrap the GND to imitate the signal line. If there is a model ...
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Precautions for the use of linear displacement sensors - double blessing
Whether it is a linear displacement sensor or a rope displacement sensor, it often encounters a variety of problems when it is used, including quality problems, application problems, environmental problems, etc., but the use of problems is common, and improper use is easy to damage the sensor.
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Precautions for the installation of single-point load cells – we are blessed
1. Single-point load cells should be handled with care, especially for small capacity sensors with alloy aluminum as elastomers, any vibration-induced impact or drop is likely to cause large output errors.
2. Design loading ...
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Test Methods for Torque Transducers – Beggarbless
In recent years, the use of torque sensors has gradually increased, it can convert physical changes into accurate electrical signals, so what methods can torque sensors go through?
The proven test method of torque sensors is ...
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Precautions for pressure sensors – a blessing
1. Avoid scum deposited in the catheter and contact the transmitter with corrosive or overheated media.
2. When measuring the gas pressure, the pressure port should be opened at the top of the process pipeline, and the transmitter should also be installed at the upper part of the process pipeline, so that the accumulated liquid can be easily injected into the process.
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Important features of our sensors
On the linear scale of our sensors, the higher the sensitivity, the better. Because only when the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is conducive to signal processing. However, it should be noted that the sensitivity of the sensor is high, and the external noise that is not related to the measurement is also simple.
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Sensor Selection Considerations – Benefit Us
In order to carry out a detailed measurement operation, it is necessary to first consider the principle of the sensor, which needs to be determined after analyzing many factors. Since, even if the same physical quantity is measured, there are multiple principles of sensors to choose from, which principle of sensor is more suitable, ...
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How to make a load cell
1. Preparation of materials
The materials required for the manufacture of load cells include: thin-film resistors, elastomers, wires and adapters.
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In the process of application, the sensor will inevitably be affected by the environment, temperature, dust and other factors, so that the equipment is aging or wearing, and if these problems are not dealt with in time, it will bury potential troubles for the future use of the equipment, resulting in large and small problems, and ...
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The difference between optical fiber and photoelectric sensors – we are blessed
1. The definitions are different
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Pressure control of servo presses – we are blessed
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Precautions for installation during the use of encoders
First of all, the following points should be paid attention to when wiring the encoder:
1. It is necessary to use a metal cable bracket and ensure that the bracket connection is connected to the ground;
2. The cable should be arranged as close to the metal parts as possible, such as control cabinet panels, beams and metal rails, etc.
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