What are the precautions for the on-site work of the instrumentation?
A: We must first analyze from the comprehensive analysis. Before proceeding with the work, we must pay attention to the safety risk analysis according to the work tasks, detail the harmful risk factors, and take corresponding safety measures to wear various protective equipment. If you are climbing the work, you must follow the requirements of climbing, wear anti-slip shoes, fasten your seat belts, work in the windy days or rain and snow, and so on. Work on the hot work requires a good work ticket, analyze and pass the test. The guardian can only work; when inspecting or repairing closed containers such as towers, tanks, tanks, reactors, etc., perform analysis or replacement work, confirm that they are qualified before they can work, and hang signs such as work.
When working, it is necessary to wear protective tools such as gas masks or air breathing apparatus for the inspection of toxic and harmful corrosive media measuring instruments and regulating valves; instruments that need to be powered off must be prepared for power outage, with interlocking or self-regulating adjustment. When the valve is overhauled, the process personnel shall be notified in advance, and the maintenance conditions shall be created, the interlock shall be removed or the automatic control circuit shall be set to manual control; the hammer in the oxygen-rich area shall be prohibited from being knocked or the device susceptible to sparking shall be used during the overhaul; When standing on the side of the meter, make sure that the pressure medium is drained before it can be disassembled. If it is toxic and harmful, it must be discharged to the designated location to prevent pollution. If the instrument is to measure oxygen medium, it must be degreased when it is installed. When dealing with high-temperature medium instrument failure, take measures to prevent hot and heat, and make sure that the secondary valve is closed.
What are the safety precautions when troubleshooting machinery?
A: First of all, of course, it is necessary to wear labor protection products according to the regulations. When repairing equipment, the system of “power off and power off†must be strictly implemented. Before the equipment is repaired, it must be vented. When repairing in the explosion-proof area, pay attention to fireproof and explosion-proof, safe use of explosion-proof tools. When observing the cross-work, observe it in order to prevent the object from falling and injuring people. When repairing the connected parts, the connected parts must be jammed so that they cannot be slid and can be repaired. When installing the chain or gear transmission machinery, it is strictly forbidden. Rotate the machine arbitrarily, check whether the reverse chain lock is normal when lifting the equipment, check whether the rack car is normal, to prevent the equipment from slipping and hurting people. When disassembling the bearing and other quenching parts, it should be applied with a copper rod or a wooden stick. Knock directly with a sledgehammer.
What should I pay attention to when repairing live?
Answer: When the meter needs to be powered on or repaired, it is best to take the power of the branch. After power-on, pay attention to the condition inside the watch. If there is any fire, smoke or odor, immediately disconnect the power supply and confirm that there is no abnormality. After that, gradually turn on the power of other parts. Do not energized immediately checked and found no abnormalities to be checked and then, to avoid further damage to the circuit.
Measuring instrumentation to carefully pin element often needs maintenance operation voltage measurement electronics, transistors and integrated circuits such as static measurements of each pin, the dynamic operating voltage. Since the multi-pin integrated circuit and dense, the operation must be careful, the slightest mistake will burn IC. To avoid inadvertent short circuit caused due to the measurement, the multimeter test leads can slightly modified, can be used assorted metal rasp head table file tip pen point, and then put some of the hollow plastic tube, is only allowed to be exposed to about lmm metal head, so that The touch point of the test leads is small, while the other parts are insulated. It is not easy to touch other pins during measurement and cause a short circuit.
When good insulation between the member detached in the maintenance of the instrument, when the circuit board should be removed and lifted, observation and inspection of the circuit board between the circuit board and, between the circuit board and the metal member, an insulating measures must be taken In order to avoid a short circuit and burn out the circuit components. The best way is to buy a plastic copy board, or find an old X-ray film, which is very safe and practical for the insulation between the board and the circuit and between the board and the metal components.
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