Hanna Instruments HI-97757-11 CAL Check Standards for Ozone

Hanna’s Cal Check standards offer a simple solution for validating the HI-97757 Portable Ozone Photometer. This high-quality standard set is manufactured in a state-of-the-art facility and comes with a Certificate of Analysis listing the lot number, reference values, and expiry date, ensuring traceability. Contains two cuvettes A zero and B. Follow the procedures below or see the manual which can be downloaded here.

HI-97757-11 CAL Check Standards for Ozone

Validation of the HI-97757 involves verifying the concentration of the certified CAL Check standards. The CAL Check screen guides the user step-by-step through the validation process and user calibration (if necessary).

WARNING: Do not use any solutions or standards other than the Hanna Instruments® CAL Check Standards. For accurate validation and calibration results, please perform these at room temperature, 18 to 25 °C.

Note: CAL Check Standards will not read the specified value in measurement mode. Protect the CAL Check cuvettes from direct sunlight by keeping them in the original packing. Store between 5 and 30 °C, do not freeze.

How to perform a CAL Check:

Press CAL Check from measurement mode.

The “Not Available“ message or the date, time and status of the last CAL Check will be displayed on the screen.

Press Check to start a new CAL Check.

Press the key at any time to abort the validation process.

Use the functional keys to enter the certificate value of the calibration standard found on the CAL Check™ Standard Certificate. Press Next to continue.

Note: This value will be saved in the instrument for future validation. If a new set of calibration standards is obtained, please update the certificate value.

Insert the A ZERO CAL Check Cuvette A then press Next to continue. The “Please wait...” message will be displayed during the measurement.

Insert the HI-97757B CAL Check Cuvette B then press Next to continue. The “Please wait…“ message will be displayed during the measurement.

When the CAL Check is complete, the display will show one of the following messages and the value obtained during the measurement: “PASSED“: The measured value is within the accuracy specification, no user calibration is required.

“OUT OF SPECIFICATION“ and Calibrate is available: The measured value is near the expected value. To update the user calibration press Calibrate. Press Accept to confirm or Cancel to return to the previous screen.

“OUT OF SPECIFICATION“: A user calibration is not allowed, the measured value is outside of the tolerance window. Check the certified value, expiration date and clean the outside of the cuvette. Repeat the CAL Check procedure. If this error continues contact Hanna Instruments UK here.