ABB 4690 Series - Setup Procedure for the De-Bubbler

4690 SERIES | TURBIDITY SENSOR | OI/ATS410-EN REV. A
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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