Calibration - wtw pH/Oxi 340i Operating Manual

pH/Oxi 340i Operation
4.4.5 D. O. calibration
Why calibrate? D. O. probes age. This changes the slope of the D. O. probe. Calibra-
tion determines the current slope of the probe and stores this value in
the instrument.
l After connecting another D. O. probe
When to calibrate?
l When the probe symbol flashes (after the calibration interval has ex-
pired).
Calibration procedures The calibration is performed in water vapor-saturated air. Use the
®
OxiCal -SL air calibration vessel (accessories) 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- You can view the data of the last calibration on the display. The pro-
tion data ceeding is described on page 48.
Printing the The calibration record contains the calibration data of the current cali-
calibration protocol bration. You can transmit the calibration protocol to a printer via the se-
rial interface (see page 50).
Note
You can automatically print a calibration protocol after the calibration.
To do so, connect a printer to the interface according to section 4.7.2
before calibrating. After a valid calibration, the record is printed.
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