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The alum pump is controlled by process controller. Each semester should create a folder with records of process controller method files and data.
Tube Settlers
Tube settlers should be rested In order to get the tube settlers to stay at a 60 degree angle, rest the bottom end along supporting tube on one wall of the baffle connections and against the side wall of the tank. When they are connected the sampling line they should be submerged flocculator and the top end along the other side of the flocculator. This achieves approximately 60 degree angle. To keep the tube settler in place tuck the sampling line between a baffle and the wall. This is an effective way of securing the tube settlers. After moving them, the tube settlers are filled with air, tend to float. This can be prevented by submerging the tube settlers to fill them with water before connecting the sampling line. If they are not submerged, the tube settlers will fill very slowly. The seal between the tube settler and the turbidimeter must be air tight otherwise the turbidimeters will not fill. Check to be sure the sampling line is all the way in the bulkhead fitting if the tube settlers are not filling (push past initial resistance).
Turbidimeters
Turbidmeters should be checked before any test is run in the flocculator. If they are dirty they should be cleaned with distilled water and kim wipes. If the turbidimeter reads dessicant, the dessicant needs to be changed. This can be done by unscrewing the lid of the turbidimeter and replacing it.
Sampling line
The sampling A common problem that occurs is that the lines from the tube settler to the tank are easily clogged. Back washing them should sampling point to the turbidimeters fill with sediment and the pump is unable to get water through them. If this happens, you should remove the clogged line, including all connections, and clean them. As this is a common problem, you may want to clean the lines before starting an experiment to increase your chances of a successful experiment. Back washing them may also help solve this problem. Some times clogs form the inlet valve for the raw water sampling line. Toggling the valve to increase and decrease pressure in the line should solve this problem.