horiba OM-71G, Instruction Manual

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Dissolved oxygen measurement
21
3. Hold the DO electrode still in clean air and press the key.
Stabilization judgment starts and the HOLD icon blinks. When the value is stabilized,
the HOLD icon changes from the blinking state to the lit state and the calibrated value
is displayed (the calibrated value differs depending on the conditions because it is
affected by temperature and air pressure).
Tip
You can cancel calibration by pressing the key while the HOLD icon is blinking.
Stabilized
key