Xylem Oxi 3210 Dissolved oxygen (D.O.) meter User Manual
Page 28
Operation
Oxi 3210
28
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03/2009
Stability control
(AutoRead )
The stability control function (AutoRead) continually checks the stability
of the measurement signal. The stability has a considerable impact on
the reproducibility of measured values. The display of the measured
parameter flashes until a stable measured value is available.
You can start the Stability control function manually at any time,
irrespective of the setting for automatic Stability control (see page 25)
in the Measurement menu.
Note
You can prematurely terminate the Stability control function manually
with
Criteria for a stable
measured value
The Stability control function checks whether the measured values are
stable within the monitored time interval.
The minimum duration until a measured value is assessed as stable is
the monitored time interval. The actual duration is mostly longer.
2
Release the frozen measured value again with
The HOLD function is switched off.
The [HOLD] status display disappears.
1
Freeze the measured value with
The [HOLD] status indicator is displayed.
2
Using
manually.
The [AR] status indicator appears while the measured value is
assessed as not stable. The [HOLD][AR] status indicator
appears as soon as a stable measured value is recognized.
3
Using
control.
or
Release the frozen measured value again with
The display switches to the measured value display.
The [AR][HOLD] status display disappears.
Measured parameter
Time interval
Stability in the time interval
D.O. concentration
10 seconds
Δ
: better than 0.05 mg/l
D.O. saturation
10 seconds
Δ
: better than 0.6 %
D.O. partial pressure
10 seconds
Δ
: Better than 1.2 mbar