How to Connect Electric Contact Pressure Gauges Correctly
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How to Connect Electric Contact Pressure Gauges Correctly
Install an electric contact pressure gauge on a pipeline, with contact 1, contact 2, and contact 3; After measuring with a multimeter, it has been proven that 1&3 are normally closed points and 2&3 are normally open points; I am now given a pressure range (4-6 kilograms pressure is acceptable) that is below 4 kilograms and above 6 kilograms. Immediately connect the circuit (power on the relay coil after closing) to alarm; May I know how to connect the wires? I used a 3 * 2.5 control line.
3 is the normally closed point, connected to 4 kilograms (low pressure); 2-3 is the normally open point, connected to 6 kilograms (high pressure);
I have previously connected an electric contact pressure gauge to directly control the contactor coil of the water pump motor. When the weight is less than 4 kilograms, the pump will start, and when the weight is more than 8 kilograms, the pump will stop without any alarm. Connect the normally closed point to the high-pressure stop pump, and the normally open point to the low-pressure start pump. Anyway, you can try it after connecting it, or you can also try using a hand pressure pump.
Current direction:
The live wire enters the midpoint, passes through the low-voltage point, reaches the normally closed point of the contact group 1 of the intermediate relay, and reaches one end of the contactor coil,
Connect the other end of the relay coil to the neutral wire.
Choose another set of normally open contacts on the contactor and connect the two terminals in parallel to the low voltage and midpoint terminals of the pressure gauge.
The control of the intermediate relay is from the live wire entering the midpoint of the pressure gauge, to the high voltage point, to a section of the intermediate relay coil,
