Using setpoint ramping
Alicat controllers come equipped with a setpoint ramping feature that allows you to ramp up and/or down to changes in setpoint.
Setpoint ramping is one of Alicat’s latest mainline functions. With setpoint ramping you can set a maximum speed at which a mass flow or pressure controller flows until the setpoint is achieved. Typically, ramps have been programmed through PLCs (programmable logic controllers), but Alicat has simplified this process by allowing you to perform this functionality through the front display or via serial command. And the setpoint is updated every millisecond so you never lose the speed you’ve come to associate with Alicat.
Setpoint ramping is a utility that can be used in many fashions. One of our customer’s more common usages for this feature is for safety or precautionary. Rather than allowing a volume to be instantaneously pressurized or a high flow rate to be immediately seen by a process, ramping allows for a more controlled, observable behavior. Setpoint ramping can also be configured to only be applied to a single direction which is useful in situations in which you may need to quickly zero pressure or flow during an emergency.
To enable and edit the setpoint ramp functionality on your device, follow the instructions below.