Honeywell 9782 Series manual Softener Monitoring, Steam Power Measurements

Two-Cell Applications

Softener Monitoring

Softener monitoring by conductivity ratio gives a continuous indication of performance. Sodium is typically more conductive than the hardness minerals it displaces, yielding a higher conductivity at the outlet. A ratio approaching 1 indicates that hardness ions are breaking through and that regeneration is needed.

(Hard) Water Supply

Cell 1

a/n 23192

Cell 2

(Soft) Treated Water

Cell1
Softening Ratio = Cell2	Typical Ratio Range is 1 to 1.25

Steam Power Measurements

The three conductivity measurements in power plants relate to water chemistry parameters as follows:

∙Specific conductivity -- chemical treatment level

∙Cation conductivity -- total anion contaminants

∙Degassed conductivity -- non-volatile anion contaminants

∙Cation minus degassed conductivities -- carbon dioxide

The 9782 Standard Range Analyzer/Controller includes a complete menu of field-selectable functions for these determinations. In addition to specialized high purity temperature compensation for specific and cation conductivity, the 9782 includes reboiler measurement functions to automate ASTM Test Method D4519 for determining anions and carbon dioxide.

7/99 9782 Series Conductivity/Resistivity Analyzer/Controller - Operator’s Manual Appendix B - 3