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This project involved redesigning and automating the in-lab stirred cell setup to improve process efficiency and data accuracy during filtration experiments. I established serial communication between an Ohaus Scout Pro scale and a computer using MobaXTerm to enable data transfer and verification. Building on this foundation, I developed a LabVIEW program to control two solenoid valves—automatically directing airflow into or out of the system based on real-time filtrate mass readings from the scale. This setup allowed for fully automated operation and continuous data logging, reducing manual intervention and ensuring more reliable experimental results.

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Image 1: Stirred cell product containers​

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Image 2: In-lab stirred cell setup​ where stirred cell product containers are placed onto

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​​​​​​​​​​​​​​​​​​Images 3 and 4: Ohaus Scout Pro Scale and RS232 Commands​

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​​​​​​​​​​​​​​​​​​Images 5 and 6: My LabVIEW Front Panel and Block Diagram Code​

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LabVIEW System Breakdown

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1. Select Program Parameters
a. Weight of Desired Output (Filtrate): Target mass of liquid to be collected.
b. Maximum Test Duration (Timeout): Defines the longest allowable test run time.
c. Manifold Selection: Choose which of the four available modules to activate.
d. Filtrate Density Input: User enters the solution density (D).

The system calculates the target mass for 10 mL based on the entered density:

Mass (M) = 10 mL × Density (D)
Mass (M)=10 mL× Density (D)

This allows the program to operate in either drive-to-weight or drive-to-volume mode, depending on the test requirements.
e. Test Description: User enters details such as solute type, applied pressure, and data identifiers.

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2. Set Desired Air Pressure Manually

Operator adjusts air pressure to the specified level before initiating the test.

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3. Start Test
a. Scale is zeroed.
b. Program activates the solenoid valves to open and begin airflow.
c. Feedback loop begins between the scale readings and the control system.

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4. Test Execution

The system continuously monitors filtrate weight and runs until the target liquid volume (e.g., 10 mL) is reached.

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5. Test Completion
a. Air valves automatically close once the target is achieved.
b. System resets and is ready for the next test setup.​​​​​​​​​​​​​​​​​​​​​​​​​