Honeywell UDA2182 Manual do Utilizador Página 225

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Appendices
January 2009 UDA2182 Universal Dual Analyzer Product Manual 213
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
CELL 2CELL 1
PROCESS
UDA2182 ANALYZER
OUTPUT SIGNAL
DIFFERENCE ALARM
CELL 2CELL 1
PROCESS
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 1
CELL 2
PARTS FLOW
RINSE
WATER
WASTE WATER
Conductivity Ratio =
Typical Ratio Range is 0.1 to 1.1
Cell1
Cell2
Cell1
Cell2
CELL 1
CELL 2
PARTS FLOW
RINSE
WATER
WASTE WATER
Conductivity Ratio =
Typical Ratio Range is 0.1 to 1.1
Cell1
Cell2
Cell1
Cell2
Conductivity Ratio =
Typical Ratio Range is 0.1 to 1.1
Cell1
Cell2
Cell1
Cell2
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