Set Up Procedure For De-Bubbler - ABB 4690 User Manual

4690 Series
Turbidity systems

3.4.2 Set Up Procedure for De-bubbler

With a system that includes a de-bubbler, referring to Fig. 3.12:
1. Open the 'sample in' isolating valve
2. Adjust the sample flow through the turbidity system using flow regulating valve
Note. Sample regulating valves together with a flow indicator are recommended to ensure easy maintenance and consistent
performance. These devices are not supplied with the 7998 Turbidity systems.
Dimensions in mm (in)
Drain
Outlet
500 (19.7) minimum
– see Caution 2 Tundish
A
Sample In
Fig. 3.12 Typical System Installation for 7998 Series Turbidity Systems
Caution.
1. To prevent degassing of the sample and very erratic readings, do not exceed this measurement.
2. This is the minimum installation distance that ensures adequate flowrate through the sensor. Increase this distance as
necessary if using long or small-bore tubing.
IM/4690–EN Rev. A
A
such that the overflow from the de-bubbler is at a minimum.
De-bubbler
150 (5.9) maximum
– see Caution 1
B
B
.
4690
Sample Outlet
Connector
7998 Series
Inlet/Isolating
Drain Valve
valve
Optional
3 Installation
4695
150 (5.9) maximum
– see Caution 1
Tundish
11