Hanna Instruments HI2400 Instruction Manual page 23

• Submerse the DO probe in the second
vessel as near as possible to the reference
thermometer. Allow a few seconds for the
probe to stabilize.
• Use the ARROW keys to set the reading on
the secondary LCD to that of the hot water.
• When the reading is stable, the "CFM" tag
starts blinking.
• Press CFM to confirm. The instrument returns
to measurement mode.
Note: If the reading is not close to the selected calibration point,
"WRONG" tag will blink. In this case, check if the value set on
the secondary LCD and the temperature measured with reference
thermometer are close. Change the DO probe or restart calibration
if necessary.
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