Endress+Hauser Teqwave T, Operating Instructions Manual

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Teqwave T Operation
Hauser 33
9 Operation
9.1 Changing the operating language
Operating language settings →  25.
9.2 Performing the measurement
Change of fluid
Risk of injury due to unforeseeable chemical reactions when changing the fluid.
‣
The temperature of the sensor may not exceed the flash point of the new liquid under
measurement.
‣
Clean thoroughly to remove all traces of the previous liquid. When cleaning, make sure
to use appropriate personal protection equipment.
Measurement result is not representative
Heterogeneous mixing, air bubbles and variations in temperature can lead to incorrect mea-
surement results.
‣
Stir the liquid continuously to ensure a homogeneous liquid mix and an even balance of
temperature.
9.2.1 Preparing a sample
If it isn't possible to carry out a measurement while the process is running or if there are wide
temperature fluctuations or inhomogeneous mixing, consider the following recommenda-
tions when preparing the sample:
• Transfer a sample from the process into a beaker or similar vessel in order
• Stir the sample continuously to get an even balance of temperature between the liquid and
the sensor and a homogeneous liquid mix.
9.2.2 Performing the measurement
1. Immerse the sensing area of the sensor completely in the liquid to be measured.
2. Switch on the measuring device with the On/Off button.
 The local display of the measuring device starts booting.
 A choice of measurement points appears.
WARNING
NOTICE