Hanna Instruments HI 3221 Instruction Manual page 47

• Immerse the temperature probe or the pH probe including temperature
sensor into the vessel with ice and water as close as possible to the reference
thermometer. Allow a few seconds for the probe to stabilize.
• Use the ARROW keys to set the calibration point value to that of ice and
water mixture, measured by the reference thermometer. When the read-
ing is stable and close to the selected calibration point, the Confirm
function key is displayed.
• Press Confirm to confirm.
• The second expected calibrated point is displayed.
• Immerse the temperature probe into the second vessel as close as possible to
the reference thermometer. Allow a few seconds for the probe to stabilize.
• Use the ARROW keys to set the calibration point value to that of the hot
water.
• When the reading is stable and close to the selected calibration point,
Confirm function key is displayed.
• Press Confirm to confirm. The instrument returns to measurement mode.
Note: Use ARROW keys to change calibration point if necessary (±10.0 ºC)
around the point.
If the reading is not close to the selected calibration point, "Wrong"
message will blink. Change the temperature probe and restart calibra-
tion.
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