This document describes the usage and characteristics of Hanna hardness low range test kit.
This document is an instruction manual for the Hanna Instruments HI 3840 Hardness Low Range Test Kit. It provides guidance on unpacking the kit, which includes a reagent bottle and a calibrated plastic vessel, and outlines safety precautions before use.
The manual details the chemical reaction method (drop count titration using EDTA) to measure total water hardness ranging from 0 to 150 mg/L CaCO3. It includes step-by-step instructions for performing the test, interpreting results based on drop counts, and provides conversion tables for various units including French, German, and English degrees.
| Range | 0 to 150 mg/L (ppm) CaCO3 |
|---|---|
| Smallest Increment | 5 mg/L (ppm) CaCO3 |
| Analysis Method | Drop count titration |
| Sample Size | 50 ml |
| Number of Tests | 50 (average) |
Add 5 to the number of drops required for the color change.
Water hardness is a quantitative measure of calcium and magnesium ions in the water sample.
The color change of the indicator from red to blue.