wtw Turb 550, Operating Manual

Page: 26 / 54

Operation
26
Note
If you use the flow-through vessel, you do not need to rinse
the cell 3x with the sample. The sample rinses the cell as it
flows through. Even the forming of air bubbles is consider-
ably reduced.
Measuring
Note
If you pour in samples that are too cold, the outside of the
cell may mist up causing the measured value to be much too
high. We recommend waiting until the sample has reached
room temperature before filling.
1 Remove the cover from the flow-through vessel
2 Slowly pour approximately 500 ml sample into the
container of the flow-through vessel. The sample
runs through the vessel into the cell and any excess
sample runs out again through the outlet hose. In this
way, any “old” sample liquid that remains will be dis-
placed
3 When no more liquid runs out of the outlet hose, wait
for a stable measured value and read it
4 If you want to measure and compare several sam-
ples, press the key. The last measured value is
stored and appears in the lower display line
5 Repeat steps 1 to 4 for all the samples.