The power fuse often burns out or the current meter does not indicate during the operation of the electricuator, and sometimes the motor of the actuator does not rotate. After analysis, the reasons for the occurrence of this phenomenon are as follows. 1. The reason for the to be burned out and the power meter to have no indication 1) Most of the actuators work in harsh environments, with more dust and easy water leakage. It is easy to deposit dust and dirt between the two feet of the power plug 13 and 14, that is, an "additional resistance" is formed between the two feet the power plug 13 and 14, resulting in a short circuit of the power supply; or water leakage drops on the power socket, causing the fuse to burn out Sometimes the case of the capacitor inside the actuator (for example, the commutation capacitor of the actuator motor) is broken, and the case is tightly connected to the meter, forming a power ground and burning out the fuse. 2) The blades of the fan and the housing are stuck, or the moving parts of the fan are rusted, the transmission gears inside the actuator are lack of oil, etc., which will cause the friction force to increase, resulting in the output power of the actuator reaching the limit and the fuse is burned out due to the increase in current. 3) There is a problem with the internal or transmission line of the actuator. At this time, the plug of the actuator can be pulled out to check whether it is its internal problem or the problem of the transmission line. If the fuse is no longer burned after pulling out the, it is its internal problem, otherwise it is likely that the transmission line has a problem. It is likely that the line near the plug is damp, which causes the power lead short circuit at this point. 4) The plastic on the actuator socket has aged and deteriorated, and the insulation is not good, resulting in a short circuit to ground In this case, if the actuator is taken back to the instrument repair room for calibration, no problem will be found, because there is an insulating rubber plate on the desktop of instrument repair room, which prevents it from short-circuiting to ground. On site, if the actuator is only placed on the bracket and separated from the fan, and fuse is connected, if it is no longer burned out, the insulation of the socket can be checked with a megohmmeter to determine whether the plastic on the socket has aged 5) The power meter has no indication. This is mostly due to the fact that the rectifier diode or rectifier stack tube inside the actuator is burned out, sometimes it may be caused by poor soldering or poor contact. 2. Troubleshooting and maintenance For 1) in the previous section, the plug should be cleaned alcohol first, and it is better to cover the actuator housing with plastic film on site, which not only prevents dust from invading the inside, but also prevents rainwater fromashing onto the power plug of the actuator. For capacitors with cases that are live and in contact with the meter case, they can be wrapped with electrician's adhesive to insulate them from the case. Of course, new capacitors can also be replaced. For 3) in the previous section, the cable should be disassembled or the signal plug wrapped with yellow wax cloth should be unwrapped, and the power line connector should be found and re-wrapped. If there are any damp or scor parts of the signal line, they should be cleaned up and then put into use. If the plastic of the socket is aged, it should be replaced in time. For ) in the previous section, the damaged parts should be checked and replaced in time. In addition, in some occasions where the accuracy requirement is not very high, the relatively inexpensive differential pressure transmitter can be used to replace the expensive micro differential pressure transmitter to save money. However, attention should be paid to the following two points during actual operation

A high-precision transducer should be selected; b、The actual measured liquid level range and the minimum range ratio of the selected transducer should be too small, so as to avoid a large measurement error due to a large K value.