Xylem Oxi 3210 Dissolved oxygen (D.O.) meter - Manual (Page 31)

Oxi 3210 Operation
31 ba75795e02 03/2009
4.4.4 D.O. calibration
Why calibrate? D.O. sensors age. This changes the slope of the D.O. sensor.
Calibration 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 datasets The Oxi 3210 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 remains stored. The Oxi 3210 recognizes the type of the
connected sensor and automatically uses the correct calibration data.
Calibration procedures With the Oxi 3210, the following calibration procedure is available:
Calibration in water vapor-saturated air.
Use an OxiCal
®
air calibration vessel for calibration.
Stability control
(AutoRead)
In calibration, the Stability control function (AutoRead) is automatically
activated.
Display calibration data You can have the data of the last calibration displayed (see section
4.4.5).
z Set 1 for the type, "CellOx": – CellOx 325
z Set 2 for the type, "DurOx": – DurOx 325