Process control applications sometimes require agitation or mixing. This requires an Agitator or a Mixer to meet the application requirements. Agitation keeps solids suspended in a fluid. Mixing mixes multiple ingredients in solid or liquid form.
Either way, when an Agitator Mixer is required it must be selected based on the properties of the materials being agitated or mixed, the size of the container or tank holding them, and the application requirements. If you don’t get this step right the control panel will not be able to control the application to your satisfaction.
Agitator Mixer Control Panel design basics
Define the application from the control panel’s perspective. The Control Panel has to know the status of process variables required to control the application. This means it may need to connect to the following devices.
- Level Sensors – when you need to insure there’s enough product to mix
- Torque Sensors – when you need to insure the mixer isn’t overloaded
- Temperature Sensors – when you need to know the product temperature
- Power Sensors – when you need to know the mixing energy
The Control Panel has to be able to control the mixer or agitator as follows.
- Operate based on
- Remote Run / Permissive signal
- Mixing Time – when you know the Batch Curing Time, or
- Product Temperature – when you know the Batch Curing Temperature, or
- Motor Power – when you know the Batch Curing Energy.
- Agitator Mixer Motor Control
- Single Speed – Use a Motor Starter
- Variable Speed – Use a Variable Speed Drive
The Agitator Mixer Control Panel has to give an Operator the ability to turn the power on and off, control the process, and monitor the process and the status of all alarms as needed.
- Main Power Disconnect
- Hand-Off-Auto Selector, and if used
- Time Setpoint (Mixing)
- Temperature Setpoint (Mixing)
- Energy Setpoint (Mixing)
- Monitor / Display
- Running Status light,
- Alarm Status lights, and if used
- Time (Mixing)
- Temperature (Mixing)
- Energy (Mixing)