Appendices

alarms (+ and -) are used. A difference kind of diagnostic can be provided by a precision check resistor in place of one cell to give continuous Analyzer/Controller checking at one value. Also see 15.11 Appendix J – Discussion on Chemical Interferences on Measured DO Currents.

UDA2182 ANALYZER

OUTPUT SIGNAL

DIFFERENCE ALARM

PROCESS

CELL 1

CELL 2

 

 

Parts Rinsing

Parts rinsing is usually controlled by conductivity to obtain adequate rinsing without wasting excess water, whether a single stage or a counter-current series of tanks. The two-cell ratio approach can determine whether inadequate rinsing is due to low flowrate or due to poor supply water quality.

CELL 2 CELL 1

 

PARTS FLOW

RINSE

WASTE WATER

 

WATER

 

Conductivity Ratio = Cell1

Typical Ratio Range is 0.1 to 1.1

Cell2

 

January 2009

UDA2182 Universal Dual Analyzer Product Manual

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Honeywell UDA2182 manual Parts Rinsing