This document is an instruction manual for the HI 93713 Phosphate Low Range ISM instrument, providing information on the design, construction, appearance, warranty, and maintenance of the instrument.
The HI 93713 is a portable instrument designed to measure phosphate (PO4) content in water, wastewater, and seawater within a range of 0.00 to 2.50 mg/L. It utilizes an exclusive positive-locking system for the cuvet holder and employs the ascorbic acid method, where the reaction between phosphate and reagent causes a blue tint in the sample.
| Resolution | 0.01 mg/L |
|---|---|
| Accuracy | + 0.04 mg/L + 4% of reading |
| Light Source | LED @ 890 nm |
| Battery Life | 40 hours |
| Auto-Shut off | After 10 minutes of non-use |
The instrument uses one 9V battery which provides a typical life of 40 hours.
Interference may be caused by Iron above 50 mg/L, Silica above 50 mg/L, and Silicate above 10 mg/L.