Xylem Oxi 3210 Dissolved oxygen (D.O.) meter - Manual (Page 28)

Operation Oxi 3210
28 ba75795e02 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 <ENTER> at any time.
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 <AR>.
The HOLD function is switched off.
The [HOLD] status display disappears.
1 Freeze the measured value with <AR>.
The [HOLD] status indicator is displayed.
2 Using <ENTER>, activate the Stability control function
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 <ENTER>, start a further measurement with Stability
control.
or
Release the frozen measured value again with <AR>.
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