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January 2009 UDA2182 Universal Dual Analyzer Product Manual 215
SPECIFIC
CONDUCTIVITY
UDA2182
ANALYZER
CATION
CONDUCTIVITY
SAMPLE
CELL 1 CELL 2
CATION
EXCHANGER
SAMPLE
REBOILER
SPECIFIC
CONDUCTIVITY
CATION
CONDUCTIVITY
DEGASSED
CONDUCTIVITY
(ANIONS)
CARBON DIOXIDE
BY CALCULATION
UDA2182
ANALYZER
UDA2182
ANALYZER
CELL 1
CELL 2
CATION
EXCHANGER
SPECIFIC
CONDUCTIVITY
UDA2182
ANALYZER
UDA2182
ANALYZER
CATION
CONDUCTIVITY
SAMPLE
CELL 1 CELL 2
CATION
EXCHANGER
SAMPLE
REBOILER
SPECIFIC
CONDUCTIVITY
CATION
CONDUCTIVITY
DEGASSED
CONDUCTIVITY
(ANIONS)
CARBON DIOXIDE
BY CALCULATION
UDA2182
ANALYZER
UDA2182
ANALYZER
UDA2182
ANALYZER
UDA2182
ANALYZER
CELL 1
CELL 2
CATION
EXCHANGER
Sodium Hydroxide and 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 UDA2182 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.