YSI MultiLab 4010-1W, Руководство по эксплуатации

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Dissolved oxygen MultiLab 4010-1W
48
ba76141e07 08/2018
7.2.4 Evaluation
The evaluation is based on the accuracy required and defined by the user (e.g.
± 2 %). Together with the nominal value (100 %) this results in a validity scope
for the check of 98 to 102 % (see example).
If the measured value is within the validity scope, no cleaning or user
calibration is required.
If the measured value is outside the validity scope, the sensor shaft and
membrane should be cleaned, and the check should then be repeated
(see section 5.4.1).
Example:
– Required accuracy: ± 2 %.
– In water vapor-saturated air or air-saturated water, the nominal
value for the relative D.O. saturation (abbreviated: saturation) is
100 %.
– Therefore, the validity scope is 98 ... 102 %
– The check resulted in a measured value of 99.3 %
The measurement error is within the specified validity scope.
No cleaning or user calibration is required.
5. Start the measurement with
<ENTER>
.
The measured value is checked for stability (stability control).
The [AR] status indicator is displayed. The measured parameter flashes.
6. Wait for the end of the measurement with stability control (beep,
[HOLD][AR] status indicator) or take over the calibrated value with
<ENTER>
.
The measured value is frozen.
7. Switch to the measured value display with
<M>
.
The check measurement is not documented.
After the
FDO Check the DO % Saturation local function is automatically
reset to the setting before the FDO Check .
O
2
99.8
%
25.0
°C
FDO Check
[HOLD]
01.02.2014
08:00
[L][t90= 30 s]