Description; General Description & Intended Use - Hanna Instruments HI97101 Instruction Manual

5. DESCRIPTION

5.1. GENERAL DESCRIPTION & INTENDED USE
The HI97101 is an auto-diagnostic portable meter that benefits from Hanna's years
of experience as a manufacturer of analytical instruments. It has an advanced optical
system that uses a Light Emitting Diode (LED) and a narrow band interference filter that
allows for accurate and repeatable readings.
The optical system is sealed from outside dust, dirt and water. The meter uses an
exclusive positive-locking system to ensure that the cuvettes are placed into the holder
in the same position every time.
With the CAL Check™ functionality, users are able to validate the performance of the
instrument at any time and apply a user calibration (if necessary). Hanna Instruments
CAL Check cuvettes are made with NIST traceable standards.
The built-in tutorial mode guides users step-by-step through the measurement process. It
includes all steps required for sample preparation, the required reagents and quantities.
The HI97101 meter measures seven important parameters in the treatment and
disinfection of drinking water, wastewater and swimming pools.
Bromine and chlorine are widely used disinfectants. In order for chlorine to be effective
the pH of the water should be less then 8.0. The method for pH is an adaptation of the
Phenol Red Method, for chlorine is an adaptation of the US EPA Method 330.5, DPD
Colori metric Method and for bromine is an adaptation of Standard Methods for the
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Examination of Water and Wastewater, 18 Edition, DPD Method.
Cyanuric Acid is added to increase the life of chlorine, without it chlorine levels can be
reduced by up to 90% in hours, when exposed to sunlight. The method for cyanuric
acid is an adaptation of the Turbidimetric Method.
Iron is present in drinking water in low concentrations, the solubility of iron compounds
increases at lower pH values. The method for iron is an adaptation of the TPTZ Method.
Iodine is used for cleaning and disinfection, and can end up in surface waters through
evaporation and rainfall. The method for iodine is an adaptation of Standard Methods
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for the Examination of Water and Wastewater, 18 Edition, DPD Method.
The HI97101 photometer is a compact and versatile meter suitable for field or bench
measurements, featuring a:
• Sophisticated optical system
• Meter validation using certified CAL Check cuvettes
• Tutorial mode guides the user step-by-step
• Auto logging
• Waterproof IP67, floating case
• GLP features
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