Xylem handylab multi 12 - Manual (Page 31)

handylab multi 12 Operation
31 ba75371e03 11/2009
4.3.5 D. O. calibration
Why calibrate? D. O. probes age. This changes the slope of the D. O. probe. Calibration de-
termines the current slope of the probe and stores this value in the instru-
ment.
When to calibrate? z After connecting another D. O. probe
z When the probe symbol flashes (after the calibration interval has expired).
Calibration
procedure
The calibration is performed in water vapor-saturated air. Use an air calibra-
tion vessel (accessories) for the calibration.
AutoRead The calibration procedure automatically activates the AutoRead function.
The AR display indicator flashes. The calibration process is finished when AR
stops flashing.
Displaying the
calibration data
You can view the data of the last calibration on the display. The proceeding
is described on page 50.
Printing the
calibration
protocol
The calibration record contains the calibration data of the current calibration.
You can transmit the calibration protocol to a printer via the serial interface
(see page 52).
Note
You can automatically print a calibration record 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.
Sample printout:
CALIBRATION PROTOCOL
02.03.01 14:19
Device No.: 12345678
CALIBRATION 02
Cal time: 02.03.01 / 14:19
Cal interval: 14d
OxiCal Tauto AR
Relative Slope: 0,88
Probe: +++