What must the Hach meter be verified with daily?

The Hach meter must be verified daily with a standard spec kit to ensure accurate and reliable measurements. A standard spec kit provides reference materials that contain known concentrations of the substances being tested. By comparing the meter readings to these known standards, users can confirm that the device is functioning within its calibrated parameters and that the results are valid. This verification process is essential for maintaining the integrity of water testing and ensuring compliance with regulatory requirements.

Using calibration fluid or following standard operating procedures is important, but the verification process specifically involves the standard spec kit to check the meter's performance against established benchmarks. Quality control documents serve as guidelines and records but do not directly verify the meter’s accuracy on a day-to-day operational basis like the standard spec kit does.