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Conductivity/Resistivity Analyzer/Controller
Appendix B - 4 9782 Series Conductivity/Resistivity Analyzer/Controller - Operator’s Manual 7/99
7082
Analyzer
Specific
Conductivity
Carbon Dioxide
by Calculation
Cation
Conductivity
Degassed
Conductivity
(Anions)
Reboiler
Cell 2Cell 1
Cation
Exchanger
Sample
9782
Analyzer
Specific
Conductivity
Cation
Conductivity
Cell 2Cell 1
Cation
Exchanger
Sample
9782
Analyzer
a
/
n 23193
Sodium Hydroxide & Hydrochloric Acid Concentration Measurements
The measurement range of sodium hydroxide by conductivity is limited by temperature. The
conductivity is limited by temperature. The conductivity of sodium hydroxide reaches a
maximum value near 14% at 0º C and 29% at 100º C. Near the maximum there is poor resolution
and no reliable way to know which side of the peak is being measured. Therefore, the 7082
measurement range is restricted by temperature to assure reliable values. Maximum
concentrations are 10% at 0º C, 13% at 25º C and 20% at 75º C and above, with linear
interpolation between these points. Operation above these limits gives a flashing display.
The measurement range of hydrochloric acid is restricted to less than 15.5% above 40º C and less
than 18% below 40º C.