Second, power off first. The power plug is connected to the 1 and 3 posts of the switch, and then the 2 and 4 posts are connected to the other side of the power cord.
1. Pay attention to control the reaction speed and accuracy. Pay attention to the response speed and accuracy of the product when purchasing, so that it can be used more smoothly when it is convenient to use. This product also has some quality problems. If you connect it directly with water, you should pay attention. You can't choose products with poor quality, because they are very cheap, which can also bring some impact on people's health.
2. Pay attention to the intelligence and energy-saving effect of control equipment. At present, everyone likes to have frequency conversion products, which can achieve energy-saving and efficient results. When choosing, we should pay attention to its intelligent characteristics and some changes of water level, so that we can manage water flow more independently and of course improve energy efficiency.
3. Pay attention to the function of the product. This product is also very professional in water resources management and cannot occupy an irreplaceable position in water resources management. When purchasing, we should choose according to the demand and product characteristics, so that this product can play a major role.