Factory Calibration - Mettler Toledo InPro 6000 Bedienungsanleitung

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Sensor type
InPro 6860 i
InPro 6870 i
InPro 6880 i
InPro 6960 i
InPro 6970 i
In contrast to amperometric sensors, a 1-point zero
calibration is not sufficient for high accuracy over the
whole measurement range and is thus not possible
(only for InPro 6970 i).
Note: A calibration of the optical sensor needs to be
performed with a digital transmitter or iSense.
Note: To check if your sensor needs a recalibration,
you may dry it and take it in the air to check that the
reading is close to 100%. If not, the sensor needs a
new calibration. Please take into account the correct
air pressure and humidity. Small deviations in air
( 3 %) are due to differences in humidity and
process pressure settings. The sensor calculates for
100 % humidity if it is set to dissolved oxygen mea-
surement.
General remarks:
– For calibration in gas (air), the OptoCap must be
dry, since adhering water drops can falsify the
measured oxygen value.
– Make sure that the settings for oxygen saturation
of the calibration is correct and remains constant
during calibration.
– In the event of calibration in water or sample medi-
um, the calibration medium must be in equilibri-
um with the air. Oxygen exchange between water
and air is very slow. Therefore it takes quite long time
until water is saturated with atmospheric oxygen.
– Calibration in a fermenter should be performed
after sterilization as process calibration (see
chapter 5.3.5).
– Make sure that all other parameters, such as
temperature and pressure, are constant.
– Calibration always needs accurate pressure and
temperature measurement. Only process scaling is
independent of those parameters (see chapter
5.3.5).
– Make sure that the correct calibration pressure, hu-
midity and salinity values are set in the transmitter
before the calibration is started.
– Please refer also to the transmitter manual for de-
tailed informations

5.3.2 Factory calibration

The sensor is delivered pre calibrated and ready for
use.
The factory calibration data are stored in the sensor and
can not be changed by the user. During this calibra-
tion all sensor specific parameters are determined.
InPro 6000 optical O
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InPro 6000 Series Optical O
Type of calibration
1-point (Air)
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sensors
2
Sensors 12 mm
2
2-point
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© 07 / 12 Mettler-Toledo AG
Printed in Switzerland
Process
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