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General| Model | HI97771 |
|---|---|
| Category | Measuring Instruments |
| Type | Photometer |
| Measurement Range (Free Chlorine) | 0.00 to 5.00 mg/L (ppm) |
| Measurement Range (Chlorine Dioxide) | 0.00 to 5.00 mg/L (ppm) |
| Resolution (Free Chlorine) | 0.01 mg/L (ppm) |
| Resolution (Chlorine Dioxide) | 0.01 mg/L (ppm) |
| Light Source | LED |
| Wavelength | 525 nm |
| Light Detector | Silicon Photocell |
| Display | LCD |
| Auto-off | After 15 minutes of inactivity |
| Resolution (Total Hardness) | 1 mg/L (ppm) |
| Accuracy (Total Hardness) | ±5% of reading |
| Power Supply | 1.5V AA batteries (3) |
| Operating Conditions | 0 to 50°C; 0 to 95% RH |
| Method | Adaptation of the USEPA method 330.5 for wastewater and Standard Method 4500-Cl G. The reaction between free chlorine and the DPD reagent causes a pink tint in the sample. Adaptation of the chlorophenol red method. The reaction between chlorine dioxide and the chlorophenol red reagent causes a red tint in the sample. Adaptation of the EDTA method. The reaction between hardness and the EDTA reagent causes a blue tint in the sample. |
| Dimensions | 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0 in) |
Details the instrument's advanced optical system, CAL Check functionality, and primary uses.
Explains the key components of the photometer, including the display, keypad, and cuvette holder.
Defines and illustrates the concepts of precision and accuracy in measurement results.
Explains the Lambert-Beer Law and the photometric principles behind the instrument's measurements.
Describes the instrument's internal optical system, including LED light source and filters.
Details the step-by-step process for validating meter performance using CAL Check standards.
Explains the Good Laboratory Practice (GLP) features for tracking calibration and measurement data.
Describes how to automatically log measurements and recall stored data.
Covers user-configurable settings such as backlight, contrast, date/time, and language.
Lists the required reagents and optional accessories available for the instrument.
Explains how to access the instrument's interactive help mode for guidance.
Details battery status indicators and automatic power-saving features.
Guides users on selecting the correct measurement method from the instrument's menu.
Explains the proper techniques for sample collection and reagent addition.
Details the critical steps for preparing cuvettes to ensure accurate and reproducible results.
Detailed procedure for measuring Free Chlorine using the powder reagent method.
Detailed procedure for measuring Free Chlorine using the liquid reagent method.
Detailed procedure for measuring Total Chlorine Ultra High Range.
Details the available reagent kits for Free Chlorine and Total Chlorine UHR.
Lists additional accessories such as carrying cases, cleaning cloths, and cuvettes.
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