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CALIBRATION
• If the buffer is not recognized (either because the pH electrode has not been placed in solution or the
reading is outside accepted range), “---- WRONG” message is displayed along with CAL tag blinking.
• After pH 4.01 or 10.01 buffer is accepted, the “SAVE” message is displayed and the controller
returns to measurement mode.
• The “CAL” tag is displayed automatically in measurement mode after a calibration has been performed.
Note: To perform one-point calibration using pH 7.01 buffer, press CAL key after the buffer is saved.
Two-Point Calibration
• Follow One-Point Calibration section for one-point calibration using pH 7.01.
• After pH 7.01 has been accepted, the “pH 4.01 USE” message is displayed.
• Place the electrode in the second calibration buffer (pH 4.01 or 10.01); it will be automatically
recognized. After the second buffer has been accepted, the “SAVE” message is displayed for
1 second and the controller returns to measurement mode.
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