Specifications HI97771 Free Chlorine and Total Chlorine UHR Free Chlorine (powder and liquid) Range 0.00 to 5.00 mg/L (as Clº) Resolution 0.01 mg/L Accuracy @25°C (77°F) ±0.03 mg/L ±3% of reading at 25°C Method Adaptation of the EPA DPD method 330.5 Total Chlorine Ultra High Range Range 0 to 500 mg/L (as Clº) Resolution 1 mg/L Accuracy @25°C (77°F) ±3 mg/L ±3% of reading at 25 °C Method adaptation of the Standard Methods for Examination of Water and Wastewater, 20th edition, 4500-Cl. Measurement System Light Source light emitting diode Bandpass filter 525 nm Bandpass filter bandwidth 8 nm Bandpass filter wavelength accuracy ±1.0 nm Light Detector silicon photocell Cuvette type round 24.6 mm diameter (22 mm inside) Additional Specifications Auto logging 50 readings Display 128 x 64 pixel B/W LCD with backlight Auto-off after 15 minutes of inactivity (30 minutes before a READ measurement) Battery type / Life alkaline 1.5 V AA (3) / > 800 measurements (without backlight) Environment 0 to 50°C (32 to 122°F); 0 to 100% RH, non-serviceable Dimensions 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0") Weight 380 g (13.4 oz.) Ordering Information HI97771 is supplied with sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), instrument quality certificate, and instruction manual. CAL Check standards and testing reagents sold separately HI97771C includes photometer, CAL Check standards, sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), cuvette wiping cloth, scissors, CAL Check standard certificate, instrument quality certificate, instruction manual, and HI7101412 rigid carrying case. Reagents sold separately Reagents and Standards HI97771 HI97701-11 CAL Check standard cuvettes for free and total chl orine HI93701-01 free chlorine powder reagent for 100 tests HI93701-03 free chlorine powder reagent for 300 tests HI93701-F free chlorine liquid reagent for 300 tests HI97771-11 CAL Check standard cuvettes for total chlorine UHR HI95771-01 total chlorine UHR reagent for 100 tests HI95771-03 total chlorine UHR reagent for 300 tests HI97771 Free Chlorine and Total Chlorine UHR Portable Photometer • Advanced LED optical system · Innovative optical design that utilizes a reference detector and focusing lens to eliminate errors from changes in the light source and from imperfections in the glass cuvette. · LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat, which could otherwise affect electronic stability. • CAL Check™ · Validate instrument performance at any time using CAL Check cuvettes made with NIST traceable standards. The CAL Check screen guides the user step-by-step through the validation process and user calibration. • On-screen tutorial mode with animations · Guides users step-by-step through the measurement process • Waterproof and floating IP67 case • Unit of measure is displayed along with reading • Built-in timer · Built-in reaction timer that ensures consistency between tests. • Error messages on display · Alerts to problems including no cap, high zero, and standard too low • GLP data · Displays the last calibration date. • Auto logging • Battery status indicator • Auto-shut off Signi¡cance of Use As one of the most common forms of disinfectants used, chlorine improves water quality by destroying disease-producing microorganisms and by reacting with other organic and inorganic substances. Chlorine levels must be actively monitored to ensure su¤cient chlorine is present for disinfection, as well as to control adverse eects such as taste, odor, and potential reactions with organic matter to form harmful disinfection byproducts. See page 10.128 for standard reagents; see page 10.129 for CAL Check kits; see page 10.66 for general accessories 10 Photometers 10.114 | www.hannainst.com portable
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