Hanna Instruments HI 2221 - Manual (Page 28)

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• When the reading is stable and close to the
selected calibration point, “READY” tag will
appear and “CFM” tag will blink.
• 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. Change the temperature probe and
restart calibration.