Evaluation - wtw Oxi 3315 Operating Manual

Oxi 3315
Stability control
(AutoRead)
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®
In the FDO check procedure, the Stability control function (AutoRead) is auto-
matically activated.
Proceed as follows to carry out the FDO ® check procedure:
1. Connect the D.O. sensor to the meter.
2. Place the D.O. sensor in the check and storage beaker, FDO ®
Check.
The sponge in the check and storage beaker must be moist (not
wet). Leave the sensor in the check and storage beaker long
enough so it can
adapt to the ambient temperature.
®
3. Start the FDO
Check / Start FDO Check.
The meter switches to the measured parameter, %.
[t90= 30 s]
01.09.2011
4. Start the measurement with <ENTER>.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter flashes.
5. Wait for the end of the AutoRead measurement ([HOLD][AR]) status indi-
cator or
take over the measured value with <ENTER>.
The measured value is frozen.
6. Switch to the measured value display with <M>.
The check measurement is not documented.

5.2.4 Evaluation

The evaluation is based on the accuracy required by the used. Together with
the nominal value (100 %) this results in a validity scope for the check.
If the measured value is within the validity scope, no cleaning or user
calibration is required.
check procedure in the measuring menu with FDO
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Dissolved oxygen
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