VWR MD 8000 L, Руководство по эксплуатации

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Dissolved oxygen MD 8000 L
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8.2.3 Calibration procedures
The MD 8000 L provides 2 calibration procedures:
 Calibration in water vapor-saturated air.
 Calibration via a comparison measurement (e.g. Winkler titration according
to DIN EN 25813 or ISO 5813). At the same time, the relative slope is
adapted to the comparison measurement by a correction factor. When the
correction multiplier is active, the
[Factor] indicator appears in the measuring
window.
8.2.4 Calibration in water vapor-saturated air
For this calibration procedure, the Comparison meas. setting must be set to off
in the Calibration menu.
As the calibration vessel use a BOD bottle that contains a small amount of
clean water (approx. 40 ml). The sensor must not be immersed in the water.
Proceed as follows to calibrate the D.O. sensor:
For both calibration procedures, an additional Zero point calibration
is possible (see section 8.2.6 Z
ERO POINT CALIBRATION
, page 46)
.
1. Connect the D.O. sensor to the meter.
2. Put the D.O. sensor into the calibration vessel.
Leave the sensor in the calibration vessel long enough (at least 15
minutes) until the air is saturated with water vapor and the sensor
is adapted to the ambient temperature.
3. Start the calibration with
<CAL>
.
O
2
99.8 %
25.1
°C
Cal
01.11.2018
08:00
DO Sat