Residual Chlorine Analyzers for Water and Wastewater
Treatment Applications Performance Evaluation Report
This test reports presents both bench and field-test
results of 11 instruments from six manufacturers of online chlorine residual
analyzer systems utilizing amperometric, colorimetric and polarographic
technologies. Both free and total
chlorine analyzers for water and wastewater treatment applications were
field-tested at a calibration range of 0-2 mg/L.
Bench Tests
Bench tests were conducted in an environmentally controlled
chamber in which one parameter at a time was changed to ascertain the individual
effect and to evaluate accuracy related measurements and the effects of commonly
encountered interferences. Bench
tests included warm-up effects; reagent addition; flow sensitivity; loss of
sample; signal noise; calibration; drift; reproducibility; dead band; detection
limit; response time; recovery time; ambient temperature effects; sample
temperature effects and interference.
Field Tests
Field tests consisted of operating the
free chlorine residual analyzers at an operating water treatment plant and the
total residual chlorine analyzers at a wastewater treatment plant for a 45-day
period. Laboratory conformance measurements were performed twice per day to
compare with analyzer output to demonstrate the instrument's overall accuracy
when subjected to many simultaneously changing parameters as experienced in
real-time monitoring conditions.
Field test results can can provide information regarding instrument design,
operation and maintenance requirements which influence the performance of the
instruments in field applications.
Instruments evaluated in this test report include:
Free Chlorine Residual Analyzers
Delta (Rosemont Analytical) Free Chlorine Model 924
Enterra (Hach American Sigma) Free Chlorine Model 5150
Fischer & Porter Free Chlorine Model Anachlor II
Hach Free Chlorine Model CL-17
Wallace & Tiernan Free Chlorine Model Micro 2000
Total Chlorine Residual Analyzers
Delta
(Rosemont Analytical) Total Chlorine Model 925 & PWC-92125
Enterra (Hach American Sigma) Total Chlorine Model 5151T
Fischer & Porter Total Chlorine Model Anachlor II
Hach Total Chlorine Model CL-17
Orion Total Chlorine Model 1770
Wallace & Tiernan Total Chlorine Model Micro 2000
227 pages
132 MB
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