This is an instruction manual that describes the use of HI 95711C Free & Total Chlorine ISM 24 produced by Hanna Instruments Inc.
The HI 95711C is an auto-diagnostic portable microprocessor meter designed to measure free and total chlorine content in water samples within a range of 0.00 to 5.00 mg/L (ppm). The instrument features an advanced optical system based on a special tungsten lamp and a narrow band interference filter, ensuring accurate and repeatable readings. It includes the CAL CHECK validation function using NIST traceable standards to verify performance at any time.
The manual provides instructions for preliminary examination, operational procedures, measurement and validation steps, calibration, battery replacement, and maintenance. It also lists required reagents and accessories, such as specific cuvet sets and cleaning solutions compatible with the meter.
| Range Free Cl2 | 0.00 to 5.00 mg/L |
|---|---|
| Range Total Cl2 | 0.00 to 5.00 mg/L |
| Resolution | 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.50 mg/L |
| Precision | +0.02 mg/L @ 1.00 mg/L |
| Light Source | Tungsten lamp with narrow band interference filter @ 525 nm |
| Battery Type | 1x9 volt |
| Auto-Shut off (measurement mode) | After 10 minutes of non-use |
| Dimensions | 180 x 83 x 46 mm (7.1 x 3.3 x 1.8") |
The meter measures free and total chlorine in water samples in the 0.00 to 5.00 mg/L (ppm) range.
Enter calibration mode by holding CAL CHECK for three seconds, then hold ZERO/SET for 10 seconds until the display shows 'F.CAL' and the parameter code.
HI 93701-0 is required for Free Chlorine tests, and HI 93711-0 is required for Total Chlorine tests.