Calibrating the pH Probe on HCl-Caustic Packed Bed Scrubber Guide

Calibrating the pH probe in your HCl-Caustic Packed Bed Scrubber is crucial for ensuring accurate readings and optimal performance. This step-by-step guide will walk you through the calibration process, ensuring your system operates efficiently. Follow these instructions carefully to achieve precise pH measurements.

Step 1: Prepare the System

Before starting the calibration process, ensure that the system is ready:

1. Turn Off the Circulation Pump: This prevents any liquid movement that could affect the calibration.
2. Close the Valves: Close the valves leading to the pH loop to isolate it from the rest of the system.
3. Drain the Liquid: Carefully drain any liquid remaining in the pH loop to prepare for the calibration process.

Step 2: Access the pH Sensor

Now that the system is prepped, you’ll need to access the pH sensor:

1. Loosen the Nut: Using the appropriate tool, loosen the nut that holds the pH pream sensor in place.
2. Remove the pH Sensor: Carefully remove the pH sensor from its housing.
3. Rinse the Sensor: Place the sensor in fresh water to rinse it off. This ensures that any residue does not affect the calibration.

Step 3: Begin Calibration

With the pH sensor clean, it’s time to start the calibration process:

1. Access the Calibration Menu: On your controller, navigate to the pH settings:
   • Press the up arrow to highlight pHS1.
   • Press the button beneath the arrow to select it.
2. Initiate Calibration: When prompted, select the calibration option. Look for the calibration symbol (a square with a plus sign) and press it.
3. Choose Calibration Type: Select 2 Point Buffer Calibration from the options provided. Confirm that you want to disable control.

Step 4: First Buffer Calibration

For the first buffer calibration, follow these steps:

1. First Buffer Value: When prompted, enter the first buffer value of 7.70 pH.
2. Immerse the Sensor: Place the sensor into a pH 7 buffer solution. Stir it gently to ensure proper mixing.
3. Allow to Stabilize: Let the sensor sit in the buffer until it stabilizes. This may take a moment.
4. Confirm Stabilization: Once stabilized, confirm the reading on your controller.
5. Remove Sensor: Follow the prompt to remove the sensor and prepare for the second buffer.

Step 5: Second Buffer Calibration

Now, calibrate using the second buffer:

1. Rinse the Sensor: Rinse the pH sensor again with fresh water to eliminate any residual buffer from the first calibration.
2. Place in Second Buffer: Immerse the sensor into a pH 10 buffer solution. Confirm that the controller recognizes the second buffer value as 10.00 pH.
3. Stabilize Again: Allow the sensor to stabilize in the second buffer, stirring as needed.
4. Confirmation: Once stabilized, confirm the reading on your controller.

Step 6: Save Calibration Results

1. Save the Calibration: After confirming the second buffer, you will be prompted to save the calibration results. Press the button below the checkmark to save.
2. Final Rinse: Rinse the sensor one last time and prepare to return it to the process.

Importance of Calibration

Calibration of the pH probe in your HCl-Caustic Packed Bed Scrubber is essential for maintaining accurate pH levels within your system. By following this step-by-step guide, you can ensure that your pH measurements are reliable, enhancing the overall performance of your scrubber. Regular calibration will contribute to efficient operation and optimal chemical management.

If you have any questions or need further assistance, refer to the manufacturer’s manual or contact technical support for help. Happy calibrating!