14
6. Operation
6.5. Manual calibration
Important note: before turning on the instrument, check that the DO
sensor is connected and polarised.
Manual readjustment of the dissolved oxygen measured within the
range.
When readjusting DO, the instrument behaves as though it were per-
forming a one-point calibration.
6.5.1. Preparation
1. Unscrew the sensor protector.
2. Rinse the sensor with deionized water.
3. Dip the sensor into the solution in which manual calibration is to be
performed.
Note: Before beginning manual calibration, you must take a measure-
ment in the standard to be used in the calibration.
6.5.2. Calibration
Stir gently holding the sensor by the handle.
Follow the diagram.
(1)
Hold down
and then press .
Note: 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).
Before beginning manual calibration, you must take a measurement in the
standard to be used in the calibration.
Important note: to exit calibration without saving the adjustment,
press
.
(1)
sensION+ DO 6_HACH_0710.indd ANG:14sensION+ DO 6_HACH_0710.indd ANG:14 14/9/10 10:51:2314/9/10 10:51:23
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