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Hi, I’m the Industrial Control Assistant. Today, I’m here to share some knowledge about transmitters. Pressure transmitters are being used more and more frequently, and many non-professionals are also starting to study the principles behind them. We continue to explore their intricacies. One of the most common problems is not knowing how to deal with transmitter failures or how to perform repairs. So today, I’ll share some methods for dealing with such situations. Reasons for poor sensitivity of the pressure transmitter: (1) Excessive friction at the rod pin, or excessive friction at the contact point between the steel ball and the plunger; (2) Improper assembly, resulting in inflexible operation or sticking; (3) Excessively long contact travel of the microswitch; (4) Improper adjustment of the adjustment screws and rod; (5) The steel ball is not round; (6) Inflexible movement of the valve core; (7) Improper installation, such as uneven or tilted installation. Solutions for poor sensitivity of the pressure transmitter: (1) Reassemble it to ensure smooth operation; (2) Reassemble it to ensure smooth operation; (3) Adjust the positions appropriately; (4) Adjust the positions of the screws and rod properly; (5) Replace the steel ball; (6) Clean and repair it to ensure flexible operation; (7) Install it vertically or horizontally. Inspection of the circuit part of the pressure transmitter: Connect it to power supply, and after applying a specified input pressure signal, check the voltage signal at the output terminal of the transmitter. If there is no output voltage, first check whether the power supply voltage is normal; whether it meets the power requirements; and whether there are any wiring errors between the power supply, the transmitter, and the load devices. A lack of voltage at the transmitter terminals, or an incorrect polarity, can both result in no voltage signal being output by the transmitter. If the above reasons are ruled out, it is necessary to further check whether there are any damaged components in the circuits of the amplifier board; also, verify whether there are any poor connections in the circuit board connectors. The method of comparing the measured voltage from a normal instrument with that from the faulty instrument can be used to identify the fault point, and if necessary, the faulty amplifier board can be replaced. When inspecting flow-type transmitters, special attention should be paid to taking anti-static measures for the J-type amplifier board. There are many other situations and various types of transmitters; we cannot list them all here. If fans have any related questions, we will continue to share information and keep updating the content – feel free to stay tuned.