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TECHNICAL SUPPORT,
continued
"Keeping Tabs on Excess Chlorine". By Charles W. Ingrahm. Reprinted
from Water Engineering & Management, April, 1983.
This article describes the use of an on-line instrument for measuring
chlorine in effluent at a 12 mgd facility.
"Nonradioactive Silica Can Be Monitored On-line". By Clifford Hach.
Reprinted from Power, Vol. 128, No. 1, 1984.
Combining turbidity measurement with on-line measurement of reactive
silica provides a much needed tool for protection of high-pressure-
system components.
Spectrophotometric Analysis
DR/2000. This brochure describes the capabilities of the DR/2000
spectrophotometer. This instrument combines microprocessor
technology, sophisticated optics and prepackaged reagents to make
colorimetric analysis easier than ever before. Over 120 preprogrammed
calibrations are stored n the instrument's memory.
DR/3000. This brochure describes the capabilities of the DR/3000
spectrophotometer. This instrument is Hach's top-of-the-line
spectrophotometer and features advanced, single-beam optics. Over 100
preprogrammed calibrations are stored in the instrument's memory.
Turbidity
Introduction to the Ratio Turbidimeter. By Richard D. Vanous, 1986.
Describes the design objectives and applications for the Ratio
Turbidimeter in laboratory and process control settings, The unique
optics of this instrument permit turbidity measurement in virtually any
liquid, regardless of color.
Principals of Surface Scatter Turbidimetry Measurement. By Clifford
Hach, 1986.
Addresses the problems of upper turbidity range limit, stray light
interference and loss of sensitivity due to dirty optical surfaces. A design
that minimizes these adverse effects is also presented.
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