How to deal with the pressure switch not jumping: adjust the set parameters abnormally
The normal operation of pressure switches relies on accurate and reasonable setting parameters. When the setting parameters are abnormal, even if the system pressure actually changes, the pressure switch may not operate as expected. Therefore, adjusting the abnormal setting parameters is an important means to solve the problem of pressure switch not tripping.
The pressure setting value of the pressure switch is the key parameter that determines its action. If the pressure setting value is set incorrectly, such as setting the upper limit pressure too high, it will be difficult for the pressure to reach the set trigger value during normal system operation, and the pressure switch will naturally not operate. In some water supply systems, if the upper limit pressure of the pressure switch is set higher than the maximum supply pressure of the water pump, no matter how the water pump works, the system pressure cannot reach the action point of the pressure switch, resulting in the pressure switch not tripping. At this point, we need to readjust the pressure setting value based on the actual working requirements of the system and equipment performance. Generally speaking, pressure switches are equipped with specialized adjustment knobs or setting interfaces. By operating the adjustment knob or entering appropriate values in the setting interface, the pressure can be set within a reasonable range. When adjusting the pressure setting value, it is necessary to gradually make small adjustments while observing the changes in system pressure and the response of pressure switches, in order to avoid adjusting the range too large at once, which may affect the normal operation of the system.
In addition to the pressure setting value, the hysteresis setting of the pressure switch can also affect its working state. Return difference refers to the pressure difference that resets only when the pressure drops to a certain degree after the pressure switch is activated. If the hysteresis setting is too small, the pressure switch may frequently operate, affecting the stability of the equipment; If the hysteresis setting is too large, it may cause the pressure switch to fail to reset in a timely manner when the pressure drops to the appropriate range, resulting in a situation where it does not trip. For example, in a gas compression system, if the hysteresis setting is too large, when the system pressure reaches the upper limit, the pressure switch will act to stop the compressor from working. Even if the pressure drops to the normal working range, due to the excessive hysteresis, the pressure switch will still remain in action and cannot restart the compressor. For the issue of abnormal hysteresis settings, adjustments should also be made based on the specific situation of the system. Usually, you can refer to the user manual of the pressure switch and choose the appropriate hysteresis value based on the operating characteristics of the system. When adjusting the hysteresis, attention should be paid to coordinating with the pressure setting value to ensure that the pressure switch can work accurately and stably.
In addition, there may be abnormalities in the delay time setting of the pressure switch. Delay time refers to the set parameter in which the pressure switch is delayed for a period of time before acting after the pressure reaches the set value. If the delay time is set too long, the pressure switch may not respond in a timely manner when the pressure changes rapidly, resulting in it not jumping when the pressure reaches the set value. In some pressure control scenarios that require rapid response, such as emergency pressure protection in hydraulic systems, if the delay time is not set properly, it will not be able to provide timely protection. For abnormal delay time settings, we need to adjust the delay time reasonably according to the system's requirements for pressure response speed. It is possible to observe the action of the pressure switch under different delay time settings through actual testing, and find the most suitable delay time parameter for system operation.
In summary, abnormal parameter settings are a common reason for pressure switches not to trip. By adjusting parameters such as pressure setting value, hysteresis, and delay time reasonably, the pressure switch can resume normal operation and meet the pressure control requirements of the system. #Pressure switch; Not jumping;
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