Sleepy Dog
- Feb 4, 2013
- 2
- Joined
- Feb 4, 2013
- Messages
- 2
Hi all, first post.
I need some help. I designed an automated bottle filling machine for the brewery I own. It's a 24v system that uses four separate control boards for the various procedures needed.
The fill level is controlled through conductivity. I use an 8 volt separate power source for conductivity. I have the circuit that powers the solenoids (24v) that opens the beer and vent running through a NC relay. When the beer level reaches the two conductivity probes, it closes the circuit and sends 8 volts to a silicon controller rectifier, which sends a clean 24v to the NC relay stopping the beer flow.
The problem is the SCR. It takes 3.2 volts to open the rectifier. Sometimes for some unknown reason I get some voltage coming back off the probes before they are closed which is strange. Its usually .5-2.0 volts. But occasionally it spikes over 3 volts and trips the SCR and stops the fill early.
Is there a way I can filter the voltage between the probe and rectifier so that it will not allow voltage through unless it reaches a certain voltage? Like 5 volts?
I need some help. I designed an automated bottle filling machine for the brewery I own. It's a 24v system that uses four separate control boards for the various procedures needed.
The fill level is controlled through conductivity. I use an 8 volt separate power source for conductivity. I have the circuit that powers the solenoids (24v) that opens the beer and vent running through a NC relay. When the beer level reaches the two conductivity probes, it closes the circuit and sends 8 volts to a silicon controller rectifier, which sends a clean 24v to the NC relay stopping the beer flow.
The problem is the SCR. It takes 3.2 volts to open the rectifier. Sometimes for some unknown reason I get some voltage coming back off the probes before they are closed which is strange. Its usually .5-2.0 volts. But occasionally it spikes over 3 volts and trips the SCR and stops the fill early.
Is there a way I can filter the voltage between the probe and rectifier so that it will not allow voltage through unless it reaches a certain voltage? Like 5 volts?