Operation Multi 197i
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4.4.5 D. O. calibration
Why calibrate? D. O. probes age. This changes the slope of the D. O. sensor. Calibra-
tion determines the current slope of the sensor and stores this value in
the instrument.
When to calibrate? z After connecting another D. O. sensor
z When the sensor symbol flashes (after the calibration interval has
expired).
Calibration procedure The calibration is performed in water vapor-saturated air. Use the
OxiCal
®
-SL air calibration vessel (accessory) for the calibration.
AutoRead The calibration procedure automatically activates the AutoRead func-
tion. The AR display indicator flashes. The calibration process is fin-
ished when AR stops flashing.
Displaying the calibra-
tion data
You can view the data of the last calibration on the display. The pro-
ceeding is described on page 50.
Printing the
calibration protocol
The calibration protocol contains the calibration data of the current cal-
ibration. You can transmit the calibration protocol to a printer via the se-
rial interface (see page 53).
Note
You can automatically print a calibration protocol after the calibration.
To do so, connect a printer to the interface according to section 4.8.2
before calibrating. After a valid calibration, the record is printed.
Sample printout:
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