4 69 0 S E R I E S |
T U R B I D I T Y SEN S O R | O I/AT S 410 - EN R E V. A
9
Setup procedure for the de-bubbler
For systems that include a de-bubbler, refer to Figure 6:
1
Open the ‘sample in’ isolating valve
A
to keep the overflow from the de-bubbler at a minimum.
2
Adjust the sample flow through the turbidity system with the flow regulating valve
B
.
Note
It is recommended to use the sample regulating valves together with a flow indicator to ensure easy maintenance and consistent
performance. These devices are not supplied with the 4690 Turbidity systems.
Figure 6 Typical system installation for 4690 series turbidity systems
NOTICE
1 To prevent degassing of the sample, which can cause very erratic readings, do not exceed this measurement.
2 This is the minimum installation distance that ensures adequate flow rate through the sensor. Increase this distance if you
use long tubing or small-bore tubing.
Dimensions in mm (in)
A
B
De-bubbler
Drain outlet
500 (19.7) minimum
– see
Notice 2
Sample in
Drain valve
Optional
150 (5.9) maximum
– see
Notice 1
Inlet/isolating
valve
Tundish
150 (5.9) maximum
– see
Notice 1
4690 series
Sample outlet
connector
Tundish
