Endress+Hauser Memosens COS81E, Руководство по эксплуатации

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Memosens COS81E Product description
Hauser 9
3.2 Product design
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A0027181
 1 Memosens COS81E
1
2
3
4 Memosens plug-in head with optics assembly
Thrust collar
Sensor shaft
O-ring sensor shaft 5
6
7
8 Spot cap
Optical waveguide with temperature sensor
Process seal 10.77 x 2.62 mm
Process connection Pg 13.5
The suitability of the selected materials for use in the process must be assessed during
the product configuration.
Process conditions that go beyond the resistance range of the materials may shorten
the operating life of the materials and make maintenance necessary.
3.2.1 Spot cap
The oxygen dissolved in the medium is diffused to the luminescence layer of the spot cap.
A suitable flow is not required, as no oxygen is consumed during measurement. However,
flow improves the speed at which the measuring system reacts and ensures a more
representative measured value compared to a measurement in a static medium.
The spot is permeable for dissolved gases only. Other substances dissolved in the liquid
phase, such as ionic substances, will not penetrate through the membrane. Therefore,
medium conductivity has no impact on the measuring signal.
The sensor's spot cap can have either a c-shaped or u-shaped design.
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 2 Design of spot cap
1 u-shaped
2 c-shaped
3.3 Stabilization time
The measuring method used by the sensor is temperature-dependent. For this reason, the
temperature of the sensor must be adapted to the medium temperature during
commissioning. You obtain reliable measured values once a stable temperature value is
reached.
The temperature usually adapts very quickly in aqueous media. Temperature adaptation
can take several minutes in gaseous media.