Manual Calibration; Preparation; Calibration - Hach DOC022.97.90255 Manual De Instrucciones

5. Operation

5.6. Manual calibration

Important note: Before turning on the instrument, check that
the pH electrode is connected.
Manual readjustment of pH (or mV) measured at any value
within the range.
When readjusting pH, the instrument behaves as though it were
calibrated with a single buffer solution.

5.6.1. Preparation

1. Unscrew the electrode protector containing the electrolyte.
2. Rinse the electrode with deionized water.
3. Dip the electrode into the solution in which manual cali-
bration is to be performed.
Note: Before beginning manual calibration, you must take a
measurement in the standard to be used in the calibration

5.6.2. Calibration

Stir gently holding the sensor by the handle.
Follow the diagram.
(1) Hold down and then press
Notes: If the measuring instrument is not used for 5 minutes, it
turns itself off automatically.
If errors occur during calibration, an error message will ap-
pear on the display screen (see pg. 19).
Before beginning manual calibration, you must take a mea-
surement in the standard to be used in the calibration.
Important: To exit calibration without saving the adjustment,
press .
14
sensION+ PH1_HACH_0710.indd ANG:14 sensION+ PH1_HACH_0710.indd ANG:14
(1)
.
pH REDOX
(1)
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