Hello everyone!
I hope that you're all doing well
Currently, I'm working on my project that controls the pressure in a closed system. I'm using Arduino mega controller connected to a pressure transducer and a vacuum pump. The vacuum pump should turn ON when the pressure in the system is above 50 kPa, and once the pressure be below that point the pump should turn OFF and the pressure in the system should remain at that level.
However, when the pressure in the system is < 50 kPa the vacuum pump is turned OFF and within seconds it goes above 50 kPa and then turns ON and then OFF... and so on. The vacuum pump keeps turning ON and OFF at that point (50 kPa). I realized later that the vacuum pump isn't isolated from the atmospheric pressure, in other words once it OFF the pressure in the system goes back to the atmospheric pressure (101.325 kPa) because the other end (vacuum pump) is open to the atmosphere.
So, now I'm looking for a device or switch that can be connected between the vacuum pump and the closed system so that when the vacuum pump if turned OFF the pressure in the closed system remains at that level without raising back to the atmospheric pressure.
PLEASE SEE THE FIGURE BELOW FOR CLEAR ILLUSTRATION
I hope you got what I meant, and looking forward for your ideas and suggestions
Regards,
I hope that you're all doing well
Currently, I'm working on my project that controls the pressure in a closed system. I'm using Arduino mega controller connected to a pressure transducer and a vacuum pump. The vacuum pump should turn ON when the pressure in the system is above 50 kPa, and once the pressure be below that point the pump should turn OFF and the pressure in the system should remain at that level.
However, when the pressure in the system is < 50 kPa the vacuum pump is turned OFF and within seconds it goes above 50 kPa and then turns ON and then OFF... and so on. The vacuum pump keeps turning ON and OFF at that point (50 kPa). I realized later that the vacuum pump isn't isolated from the atmospheric pressure, in other words once it OFF the pressure in the system goes back to the atmospheric pressure (101.325 kPa) because the other end (vacuum pump) is open to the atmosphere.
So, now I'm looking for a device or switch that can be connected between the vacuum pump and the closed system so that when the vacuum pump if turned OFF the pressure in the closed system remains at that level without raising back to the atmospheric pressure.
PLEASE SEE THE FIGURE BELOW FOR CLEAR ILLUSTRATION
I hope you got what I meant, and looking forward for your ideas and suggestions
Regards,