Hello all... new here. Stumbled into the site while searching on google.
Here's my issue. I have an old chevy pickup, and i decided to get rid of the mechanical fan and install an electric. I have a relay wired up to provide power to the fan, and a temperature sensor in the intake manifold. The temp sensor was supposed to gound the coil side of the relay and tuen it on. Well, the temp sensor doent complete the circuit untill way past the temperature that the engine should be.
It is a negative temperature coefficient sensor. As the engine warms up, the resistance drops.
I tried supplying 12volts to one side of the sensor and measuring the voltage out of the other side. At 185 degrees (when i want the fan to come on) i was getting 6 volts.
Is there a way that i could set up the relay to come on at 6 volts and go off below that? This needs to be fairly accurate, to pretect the motor.
If you guys could help, i would greatly appreciate it. And if you know of a better way to do what i'm trying to do, let me know.
Thanks in advance.
Here's my issue. I have an old chevy pickup, and i decided to get rid of the mechanical fan and install an electric. I have a relay wired up to provide power to the fan, and a temperature sensor in the intake manifold. The temp sensor was supposed to gound the coil side of the relay and tuen it on. Well, the temp sensor doent complete the circuit untill way past the temperature that the engine should be.
It is a negative temperature coefficient sensor. As the engine warms up, the resistance drops.
I tried supplying 12volts to one side of the sensor and measuring the voltage out of the other side. At 185 degrees (when i want the fan to come on) i was getting 6 volts.
Is there a way that i could set up the relay to come on at 6 volts and go off below that? This needs to be fairly accurate, to pretect the motor.
If you guys could help, i would greatly appreciate it. And if you know of a better way to do what i'm trying to do, let me know.
Thanks in advance.