Honeywell UDA2182 manual Degassed CO2, PH Calculation from Specific and Cation Conductivity Setup

Operating the Analyzer

Degassed CO2

The dual input UDA can also be configured for degassed CO2 measurement by employing cells #2 and #3. Here the cation effluent stream is degassed of CO2, typically by heating the cation effluent stream to a near boiling temperature. This heating step results in CO2 out-gassing. The resulting 25°C compensated conductivity measurement of Cell #3 is lower in value in proportion to the amount of dissolved CO2.

5.9.3pH Calculation from Specific and Cation Conductivity Setup

Connect cell 1 to input 1 and cell 2 to input 2. Follow the appropriate instructions to configure the UDA for Cation Calc (See Section 6.18 – Maintenance Configuration.) Under the sub menu selection of Inputs, the Cation Calc parameter offers two possible selections.

1.pH Ammonia: Specific conductivity temperature compensation assumes ammonia (NH3) is the base reagent. In addition to display of conductivity values, this selection provides for determination and display of solution pH value.

2.pH Amine pH: Specific conductivity temperature compensation assuming a generic amine base. These include any one or combination of the following amines:

Hydrazine Morpholine Ethanolamine Aminomethylpropanol Methoxypropylamine 4-aminobutanol

5-aminopentanol Diaminopropane Cyclohexylamine Methylamine Dimethylamine

1,5-diaminopentane Piperidine Pyrrolidine

This generic selection employs ammonia temperature compensation and optimizes pH calculation for these base reagents.

38 UDA2182 Universal Dual Analyzer Product Manual January 2009