9032X
10
1.3.1
WET SECTION UNIT
The 9032X Sodium system is capable of monitoring sodium concentrations in sample
feed. Three solenoid valves are used to select between analyzing the sample,
calibration solution 1 (CAL1), calibration solution 2 (CAL2) and grab sample.
In normal mode, the feed water flows through the flow switch, into the heat exchanger,
through the solenoid valves and into the flowcell where it comes into contact with the
sodium and reference electrodes. The electrodes transmit a voltage proportional to the
sodium content in the feed water. This output is then measured by the electrical system
and converted into a ppb/ppm measurement. An internal thermistor (housed in
flowcell) is used to monitor the sample temperature for temperature compensation. If
the sample temperature exceeds 131°F, sample automatically gets diverted to drain and
the system displays “HOT”.
Figure 2.
Sample flow during normal operation.
Sample
Inlet
Heat
Exchanger
Solenoid
1
Constant
Head Unit
Solenoid
2
Solenoid
3
Flowcell
Reference
Electrode
Measuring
Electrode
Thermistor
Entrainment
“T”
Reagent
Bottle
High
Calibration
Bladder
Grab
Sample
Bottle
Low
Calibration
Bladder
Overflow
Drain
Waste
Drain
