Labfors 5 – Version for Microorganisms
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22 January 2019
Page
53
of
205
If the mounting depth of the sensor is adjustable (mounting
with electrode holder), make sure the mounting depth is set
correctly prior to autoclaving, as later adjustment represents a
contamination risk.
Mount the sensor in such a way that it cannot come in contact
with other components or the glass vessel.
Mount the sensor in such a way that it has good access to the
flow and there is no risk of bubbles collecting in the measure-
ment gap.
4.6.4 Cleaning and Storing the Sensor
A build-up of deposits on the sapphire window will cause shifts in
the zero point and restrict the dynamic range of the sensor. As
such, the sapphire window on the sensor must be checked for de-
posits before each use and cleaned if necessary.
If necessary, store the Optek sensor in a clean, dry place at a tem-
perature of between -20°C and 70°C.
4.6.5 Interferences Turbidity Measurement
Interference
Displayed measured value is not plausible / unusual
Possible Cause
Remedy
By
Sensor cable is twisted or kinked or
not properly connected.
Check and ensure that the sensor cable is not
kinked or twisted. Connect the sensor cable properly
as necessary.
Operator
Sensor is not calibrated
Calbrate the zero point
Operator
Window fouling on the sapphire win-
dows .
Carefully clean the sensor
Operator
Faulty sensor cable
Replace sensor cable
Qualified elec-
trician
Faulty sensor
Replace the whole sensor
Operator
INFORMATION
The measuring system automatically switches off, if the temper-
ature of the sensor in the medium exceeds 50 °C during opera-
tion (thermal shutdown). Once the medium has cooled down,
measurement automatically continues.
Summary of Contents for Labfors 5
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