Hanna Instruments HI 9124 - Manual (Page 11)

11
• The LCD will flash the “WAIT NOT READY” message.
• Once the reading is stable, if it is not close to the selected buffer,
“WRONG “ and “WRONG “ will blink alternatively; if it is
close to the selected buffer the display will change to “READY”
and blinking “Press: CFM to confirm calibration point”.
• Press the CFM key to confirm the calibration: the meter stores the
offset calibration point. The calibrated reading is then displayed
on the primary LCD while the secondary LCD will show the second
buffer to be used for calibration (pH 4.01).
• After the first calibration point is confirmed, submerse the electrode
into the second buffer (pH 4.01, 10.01 or 9.18) and stir gently.
Choose pH 4.01 for acidic samples, and pH 10.01 or 9.18 for
alkaline solutions.
• Submerse the electrode approx. 3 cm (1¼”) into the solution,
place the temperature probe as close as possible to the electrode
and stir gently.
• Select the second buffer value on the secondary display by
pressing the ARROW keys.