- CAL CHECK™
- User calibration
- Certified calibration and verification standards
- BEPS (Battery Error Prevention System)
- TIMER function
- Auto shut-off
- GLP Features
The HI 96761 meter measures the traces of total chlorine (Cl2) content in drinking water samples.
This meter uses an exclusive positive-locking system to ensure that the cuvette is in the same place every time it is placed into the measurement cell.
Chlorine is integrated into water supplies in it’s molecular form for the purpose of destroying unwanted microorganisms. Once introduced to the water, chlorine will form into three different forms; free chlorine, hypochlorous acid, and hypochlorous ions. Free chlorine will combine itself with ammonia and nitrogen compounds, creating combined chlorine. When chlorine and ammonia combine, it creates chloramines (monochloramine, dichloramine, and nitrogen trichloride. Proper testing should be administered when chlorinating any water supply, as potentially harmful compounds such as chloroform may be formed. N, N-diethyl-p-phenylenediamine (DPD) as well as other methods are available for measuring total residual chlorine.
Spesification :
| Range | 0.000 to 0.500 mg/L | |
| Resolution | 0.001 mg/L | |
| Accuracy | ±0.020 mg/L ±3% of reading @ 25°C | |
| Light Source | Tungsten lamp | |
| Light Detector | Silicon photocell with narrow band interference filter @ 525 nm | |
| Power Supply | 9V battery | |
| Auto-off | After 10 minutes of non-use in measurement mode; after 1 hour of non-use in calibration mode; with last reading reminder. | |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing | |
| Dimensions | 192 x 104 x 69 mm (7.6 x 4.1 x 2.7") | |
| Weight | 360 g (12.7 oz.) | |
| Method | adaptation of the USEPA method 330.5 and Standard Method 4500-Cl G |