Hach TitraLab KF1121 Basic User Manual page 12

Refer to the illustrated steps that follow.
Check the titrant tube and sensor installation
The titrant must be added where there is most turbulence and as far away from the sensor to allow
the reagent time to react. Check that the titrant tube and the sensor are positioned correctly. Refer to
Figure 3, where the arrows show the direction of the sample flow.
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