What grounding does the field instrument have, has everyone noticed it?

Abstract: What are the grounding of field instruments, has everyone noticed it? The information is provided to you by the excellent manufacturers of flowmeters and flowmeters. What is the purpose of grounding in chemical plant instrumentation and control systems? One is to protect personal safety and the safe operation of electrical equipment; the other is to transmit instrument signals and anti-interference. Ground is the low impedance path for current to return to its source. Instrument safety. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the grounding of on-site instruments. Has everyone noticed it? Article details. What is the purpose of grounding in chemical plant instrumentation and control systems? One is to protect personal safety and the safe operation of electrical equipment; the other is to transmit instrument signals and anti-interference.“Ground is a low impedance path for current to return to its source”. After instrumentation is installed, proper grounding allows automation and control systems to reduce unnecessary failures and errors. So, what are the grounding of field instruments? Instrument grounding classification: The instrument grounding classification includes protective grounding, working grounding, intrinsically safe system grounding, anti-static grounding, and lightning protection grounding. Protective grounding: Also known as safety grounding, it is a grounding set for personal safety and electrical equipment safety. The metal casings of various electrical instruments and the metal parts of the automatic control equipment that are not charged under normal conditions may have dangerous voltage due to abnormal phenomena (such as insulation damage, etc.), and such equipment should be implemented. Protective grounding. Protective grounding is to provide a path for dangerous voltages so that they do not pass through the human body. Matters needing attention: 1. The casings of electrical measuring instruments, relays and other low-voltage electrical appliances installed on power distribution panels, control panels and power distribution devices, and insulators that will not cause dangerous voltages on the support when insulation damage occurs Metal parts such as metal bases may not be grounded. 2. The metal casing of small low-voltage electrical appliances such as buttons, signal lights, relays, etc. installed on the metal dial in non-explosion-proof occasions can not only be used for protective grounding when they have good electrical contact with the metal dial frame that has been used for protective grounding. 3. Field instruments, transmitters, on-site switches, etc. powered by less than 36V can not be grounded without special needs. Except for those that may come into contact with devices with voltages higher than 36V. 4. The self-control equipment with protective grounding can be considered as electrostatic grounding. When using an anti-static raised floor in the control room, it should be grounded statically. The electrostatic grounding should be combined with the protective grounding and the shielding grounding of the grounding system: the function of the shielding grounding is to suppress capacitive coupling interference and reduce electromagnetic interference. The components used to reduce electromagnetic interference in the instrument system, such as the shielding layer of the cable, the drain wire, and the shielding grounding terminal on the instrument, should be shielded and grounded. The shielding grounding should meet the following requirements: ① The components in the instrument system used to reduce electromagnetic interference, such as the shielding layer of the cable, the drain wire, and the shielding grounding terminal on the instrument should be shielded and grounded. ②The spare core of the ordinary multi-core cable without shielding layer laid outdoors shall be grounded. ③The shielding layer of the shielded cable has been grounded, and the spare core may not be grounded. ④The spare core of the multi-core cable passing through the protective tube may not be grounded. Lightning protection grounding: When the signal line of the instrument and control system enters the room from the outdoors, there is a power protector or other occasions where lightning protection grounding connection is required, lightning protection grounding connection should be implemented. The lightning protection grounding of the instrument and control system shall be shared with the lightning protection grounding system of the electrical system, but shall not share the grounding device with the independent lightning protection device. If there is no common electrical professional lightning protection grounding system, design requirements should be submitted to the electrical professional, and the electrical professional will design it. Lightning protection grounding connection method: When the instrument cable trough and the instrument cable protection pipe enter the control room, they should be connected with the lightning protection induction grounding device of the electrical profession. The lightning protection device in the control room should be connected with the lightning protection induction grounding device of the electrical profession. Where the instrument cable protection tube and instrument cable armor layer are required for lightning protection and grounding, it should be connected to a professional lightning protection and induction grounding device. The lightning protection device of the field instrument should be connected to the grounding device of electric field lightning protection induction. For multi-core cables without shielding layer laid overhead in the lightning strike area, the spare core should be connected to the shield and ground; for shielded cables with grounded shield layers or cables laid through steel pipes or in metal cable troughs, the spare core may not be grounded. Why separate the analog ground from the digital ground? The shielding layer of the shielded cable must be connected to the interface ground of the board instead of the signal ground. This is because there are various noises on the signal ground. If the shielding layer is connected to the signal grounding, the noise voltage will drive the common mode current to interfere with the shielding layer. Therefore, poorly designed cables are generally the largest noise output source of electromagnetic interference. Of course, the premise is that the ground must be very clean. How to ground the signal on the single board? For general devices, the nearest ground is the best.

looking for the best deal while getting a quality is usually the number-one objective for most u shape coriolis mass flow meter manufacturer.

To receive more professional tips and super quality products for fork density meter manufacturer, go to our website Sincerity Flow Meter to place your order. Do not wait any longer.

Based on the mass flow meter, here are the top compliance challenges businesses face, and what you can do to make them easier on ourselves.

Using high-quality materials to produce mass flow meter is one of the most important part during manufacturing.