Thermo Fisher Scientific CyberScan DO 600 - Manual (Page 110)

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Figure 51: Saturation Calibration Screens
4. Rinse the probe well with de-ionized water. For best results, blot the
end of the probe to dry it. Do not touch the membrane.
5. The meter then shows saturation calibration screen. The primary
display will show the current value of measurement. Wait for the
reading to stabilize.
6. Press ENTER key to confirm the calibration. The meter
automatically calibrates to 100% air saturation and returns to the
measurement mode.
Figure 52 : Saturation Measurement Screen
Function Keys available in saturation calibration mode:
TEMP (F1)
Goes to temperature calibration
Note: If you wish to completely re-calibrate the meter, you need to clear the
previous calibration data. Press CLR-C (F2) key to clear previous calibration.
The meter shows you the confirmation screen. Press ENTER key to confirm
the deleting of previous calibration.