HI 93749 Chromium VI Low Range ISM Instruction Manual
The HI 93749 is a portable instrument designed to measure hexavalent chromium (Cr VI) content in water and wastewater within a range of 0 to 300 µg/L. It utilizes an exclusive positive-locking system for cuvet placement and employs the diphenyl-carbohydrazide method adapted from ASTM Manual D1687-92. The device features a light-emitting diode source at 555 nm and a silicon photocell detector, with results displayed on a liquid crystal screen.
| Accuracy | + 1 µg/L + 4% of reading |
|---|---|
| Light Source | LED @ 555 nm |
| Battery Life | 40 hours |
| Auto-Shut off | After 10 minutes of non-use |
The instrument is powered by a single 9V battery which provides approximately 40 hours of operation.
It uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1687-92, diphenyl-carbohydrazide method.