Sample, Drain And Exhaust Connections; Sample Inlet Tube Position - Hach BioTector B3500s User Manual

5.4

Sample, Drain and Exhaust Connections

5.4.1 Sample Inlet Tube Position

Caution
BioTector operates on unfiltered samples, the setup of the sampling point is important for the correct
operation of the system. BioTector can handle soft particulates up to 100µm in diameter, however hard
particulates (e.g. sand) will damage the analyzer and should be removed from the sample.
The sample tubing length between the sample intake point and the BioTector sample port should be 2.5
meters exactly. The height of the sample chamber should be between 100mm and 500mm below the
BioTector. BioTector in fact can draw samples from distances greater than 2.5 meters however, such
distances may have an impact on the Sample Pump tubing life and may require changes in system
configuration settings for the correct operation of the system. The point where the sample is taken from
should not be pressurized. The sample inlet and outlet should be at ambient pressure. The sample
temperature should be between 2°C and 60°C (36°F - 140°F). The required minimum sample volume is
100ml per sample. The drain tube should be placed to a well ventilated area at ambient pressure and it
should not be subjected to any back pressure. Figure 15 and 16 illustrate the correct positioning and setup of
the BioTector sample tube in various/optional sampling systems.
Figure 15 BioTector sample tube position in various sampling systems
For the fittings to remain leak proof, they must be kept clean and should not be
over tightened. Over tightening of the fittings will damage them and cause
eventual leakage.
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