Xylem WTW Oxi 3310, Operating Manual

Page: 32 / 64

Operation Oxi 3310
32 ba75804e08 10/2017
the instrument.
When to calibrate?

After connecting another D.O. sensor

When the sensor symbol flashes (after the calibration interval has
expired).
Calibration datasets The Oxi 3310 administrates two sets of calibration data:
Sensors of different types can be calibrated separately from each other.
When one sensor type is calibrated, the calibration data of the other
type remain stored. The Oxi 3310 recognizes the type of the connected
sensor and automatically uses the correct calibration data.
Calibration procedures The Oxi 3310 provides 2 calibration procedures:

Calibration in water vapor-saturated air.
Use an OxiCal
®
air calibration vessel for the calibration.

Calibration via a comparison measurement (e.g. Winkler titration
according to DIN EN 25813 or ISO 5813). At the same time, the rel-
ative slope is adapted to the comparison measurement by a correc-
tion factor. When the correction multiplier is active, the
[Factor]
indicator appears in the measuring window.
Stability control
(AutoRead)
In calibration, the Stability control function (AutoRead) is automatically
activated.
Display calibration data
and output to interface
You can have the data of the last calibration displayed (see section
4.4.5). Subsequently, you can transmit the displayed calibration data to
the interface, e.g. to a PC, with the
<F2> / [USB output] key.
Note
The calibration record is automatically transmitted to the interface after
calibrating.
Sample record
Calibration evaluation After calibration, the meter automatically evaluates the current status of

Set 1 for the type, "CellOx":
– CellOx 325

Set 2 for the type, "DurOx":
– DurOx 325
Oxi 3310
Ser. no. 08502113
CALIBRATION O
2
15.03.2014 08:00:33
DurOx 325
Relative slope
0.88
Temperature 25.0 °C
++
etc...