7. Press the (DO CAL) soft-key to enter the manual DO calibration menu.
8. Make sure that the display readings are stable, then enter the calibration value in percent saturation, using the (UP),(DOWN) and (DIGIT) soft-keys. See appendix A - Oxygen Solubility Table and Appendix B - Pressures and Altitudes for manual calibration data.
If you wish to calibrate in milligrams per liter (instead of percent), verify that the salinity is set to the salinity value of the calibration. Salinity). Then, use the (NEXT) soft-key to select mg/L and enter the calibration value in milligrams per liter as shown below.