Method for Setting the Upper and Lower Limits of Electric Contact Pressure Gauge
The setting of the upper and lower limits of an electric contact pressure gauge is an important operation that involves how to adjust and use the instrument correctly. The following are detailed setup steps:
Identifying contact points: Firstly, it is necessary to identify the contacts on the electrical contact pressure gauge. Usually, the common contact is marked with the letter B or the wire color is yellow; The lower limit contact is marked with the letter L or the wire color is green; The upper limit contact is marked with the letter H or the wire color is red.
Use a multimeter: A multimeter can be used to assist in determining upper and lower limits. Set the multimeter to Fengming mode or diode mode, and measure the three wires of the electric contact pressure gauge separately. Yellow is the common point, and yellow and green are connected, indicating that it is normally closed and the lower limit. When the actual pressure is lower than the set lower limit, the motor will start. The motor will only stop when the actual pressure reaches our set upper limit.
Adjusting pointers: The electric contact pressure gauge has two pointers, which may have the same color but different lengths. Short needle is the lower limit setting, while long needle is the upper limit setting. When adjusting, it is necessary to manually adjust these two pointers to the desired upper and lower limit positions. Generally speaking, these two pointers are located on the upper and lower layers of the dial and are mostly silver in color.
Check settings: After setting the upper and lower limits, a check should be conducted to ensure that the settings are correct. The accuracy of the setting can be verified by observing the position of the pointer and monitoring the on/off status of the contacts during pressure changes in actual operation.
Please note that before making any adjustments, it is important to understand the basic principles and operating procedures of the electric contact pressure gauge to avoid equipment damage or inaccurate measurements due to misoperation. If unsure how to operate, it is recommended to consult a professional or refer to relevant operation manuals.
