I'm thinking of replacing two old "Ronald Trist" level switches on a small sized boiler.
I have been informed that any new level switches must be self checking and "Smart" protocol.
Also, that the low and high alarms may have to go back to a manned control room.
The plant is manned 24/7 and at...
I'm working on a gas fired heater using a fixed air flow, fixed process gas flow and variable fuel gas flow which is controlling the exit temperature of the process gas.
The default PID settings are Gain 50, Integral Time 5 Derivative rate 0. The manufacturers state that the heater is designed...