ABB 4690 User Manual

Also see for 4690 Series: Upgrade Procedure Operating instruction

ABB 4690 User Manual Manual pdf 11 page image

4690 SeriesTurbidity systems 3 InstallationIM/4690–EN Rev. A 93.3.1 Sample FlowrateSet a minimum flowrate of 0.5 l min -1 to prevent solids settling inthe pipework. Increase the flowrate if necessary but do notexceed the maximum flow rate of 1.5 l min-1.When measuring turbidity, it is important that additional sourcesof light scattering, such as gas bubbles in the sample, areeliminated. An optional debubbler (part number 7997 500) isavailable to eliminate gas bubbles – refer to Section 3.4,page 10.Dimensions in mm (in)Fig. 3.9 Sensor Dimensions (Without Optional Wiper Unit)6 x Ø7 (0.3)mounting holesSample DrainConnector(12 mm [0.5 in] internaldiameter tube)Sample Inlet Connector(12 [0.5] internaldiameter tube)298.0 (11.7)230.0 (9.0)282.0(11.1)118.0(4.65)155.5 (6.12)46.5(1.83)Fig. 3.10 7998 Series – Sample Outlet Connector LocationSample OutletConnector (6 [0.25]internal diameter tube)