Two- And Three-Point Calibration - Hach DOC022.97.90255 Manual De Instrucciones

5. Operation

5.3.3. Two- and three-point calibration

Follow the diagram below.
The equipment will repeat the process described for the first
buffer solution with the second and third.
Stir gently holding the sensor by the handle. Do not hold it by
the tube to avoid heating of the buffer solution.
Notes: if the measuring instrument is not used for 5 minutes, it
shuts off automatically.
If errors occur during calibration, an error message will appear
on screen (see pg. 19).
When you switch buffers, rinse the electrode with deionized water.
The buffer solutions in the calibration tubes can be used for
approximately four or five calibrations. It is recommended to
use fresh buffers.
sensION+ PH1_HACH_0710.indd ANG:11 sensION+ PH1_HACH_0710.indd ANG:11
Screw the
electrode
to the 2nd tube.
Screw the
electrode
to the 1st tube.
To exit
calibration
(One point
calibration)
11
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