ATI
Q46UV UV254/Turbidity Monitor
Part 3
– Sensor Installation
13
O&M Manual
Rev-D (11/19)
3.2
Flowcell Mounting
Figure 7 provides flowcell dimensions.
Note that the flowcell should always be mounted
horizontally with the inlet on the bottom and outlet on the top
.
Select a flowcell location with sufficient clearance below to allow installation of the inlet calibration
valve to facilitate adjustment of the system after installation. See Figure 9 for the suggested
tubing arrangement when using the calibration valve system supplied with the unit.
RT < FITTING w/
FLOW RESTRICTOR
1/4" INLET FITTING
8.154
5.456
2.656
4.030
6.000
Figure 7 - Flowcell Dimensions
Figure 8 below provides a detail of how the UV sensor is installed in the flowcell assembly.
During installation of the sensor, be sure that the O-ring is seated properly in the groove at the
end of the flowcell assembly. Proper seating of that O-ring is critical to avoiding water leakage.
Note that the sensor has an orange marking label on the back. The white lines on the label
should be aligned with the inlet and outlet fittings so that the sensor sits in the proper position
inside the flowcell.
