This document introduces the use of the HI 96720C Calcium Hardness ISM product produced by Hanna Instruments Inc.
The HI 96720C is an auto-diagnostic portable microprocessor meter designed to measure calcium hardness content as CaCO3 in water and wastewater within the range of 0.00 to 2.70 mg/L. It utilizes an advanced optical system based on a special tungsten lamp and a narrow band interference filter to ensure accurate and repeatable readings. The instrument features a powerful CAL CHECK validation function and is splash waterproof for field applications.
The manual covers the preliminary examination of the instrument, general description, abbreviations, and technical specifications. It details the principle of operation based on photometric chemical analysis using the calmagite method. Instructions are provided for startup, measurement, validation, and calibration procedures, as well as battery management and accessory usage.
| Resolution | 0.01 mg/L |
|---|---|
| Accuracy | +/-0.11 mg/L +5% of reading |
| Light Source | Tungsten lamp |
| Light Detector | Silicon Photocell with narrow band interference filter @ 525 nm |
| Environment | 0 to 50°C (32 to 122°F); max 95% RH non-condensing |
| Battery Type | 1x9 volt |
| Dimensions | 192 x 102 x 67 mm (7.6 x 4 x 2.6") |
| Weight | 290 g (10 oz) |
The instrument features a powerful CAL CHECK validation function to verify performance and can be recalibrated if necessary.
The meter measures calcium hardness content in the 0.00 to 2.70 mg/L (ppm) range.
The instrument turns off after 10 minutes of non-use in measurement mode or after 1 hour if left in calibration mode.