User Manual Q&AAnswer
Feb 24, 2025 - 12:42 AM
To calibrate the Apera Instruments TN500 Portable Turbidity Meter, follow these steps:
1. Prepare the calibration solutions: The instrument has 5 calibration points: 0 NTU, 20 NTU, 100 NTU, 400 NTU, and 800 NTU. Use AMCO 0.0 NTU calibration solution or laboratory distilled water for the 0 NTU point, and AMCO polymer solutions for the remaining 4 calibration points.
2. Replace the zero turbidity solution: If using the 0.0 NTU calibration solution, open the vial cap, pour out the original solution, add 1/2 distilled water, cover the cap, and shake the vial to rinse it. Repeat this process 3 times. Shake off the distilled water and pour in new 0.0 NTU calibration solution. If using laboratory distilled water, follow the same process.
3. Clean the vial surface: Apply a small drop of silicone oil on the surface of the vial and wipe it off with a microfiber cloth to evenly distribute the silicone oil. Then wipe again with filter paper or high-quality tissue paper to clean off any excess oil.
4. Place the instrument on a flat and level surface.
5. Turn on the instrument by pressing the power button.
6. Enter calibration mode: Press the power button while in measurement mode to enter calibration mode.
7. Select the calibration point: Use the power button to select the calibration point you want to calibrate.
8. Perform calibration: In calibration mode, press the power button to confirm calibration or select which standard to calibrate. Follow the on-screen instructions to complete the calibration process.
9. Exit calibration mode: Press the power button again to exit calibration mode and return to measurement mode.
Note: It is recommended to verify the calibration point after calibration. If the calibration point has a large error, repeat the calibration process. The instrument has specific accuracy requirements for each calibration point, which can be found in the manual.
For more detailed instructions and information on calibration, refer to the Apera Instruments TN500 Portable Turbidity Meter Instruction Manual.
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