This manual provides instructions for using the Hanna Instruments Inc. HI 96811, HI 96812, HI 96813, and HI 96814 refractometers for wine and grape product measurements.
The HI 96811, HI 96812, HI 96813, and HI 96814 are rugged, portable, and water-resistant digital refractometers designed for measuring the sugar content of grape or must samples. These optical instruments utilize Automatic Temperature Compensation (ATC) and feature a dual-level LCD display to provide quick and precise readings in various units such as %Brix, °Baumé, and potential alcohol.
The manual details the preliminary examination, general description, and specifications for each model. It explains the principle of operation based on refractive index measurement and provides step-by-step instructions for calibration using distilled or deionized water, as well as the measurement procedure. Additional sections cover changing measurement units, error messages, battery replacement, and warranty information.
| Measurement Time | Approximately 1.5 seconds |
|---|---|
| Minimum Sample Volume | 100 μL |
| Enclosure Rating | IP 65 |
| Battery Type | 1 X 9V |
| Auto-Off Timer | 3 minutes |
| HI 96811 Range | 0 to 50 %Brix |
| HI 96812 Range | 0 to 28 °Baumé |
| HI 96813 Range | 0 to 50 %Brix / 0 to 25 % v/v Potential Alcohol |
| HI 96814 Range | 0 to 50 %Brix / 0 to 230 °Oechsle |
Calibration should be performed daily, before measurements are made, when the battery has been replaced, or between a long series of measurements.
The minimum sample volume is 100 μL, which is enough to cover the prism totally.
No, the instrument is water-resistant (IP65) but should not be immersed under water or sprayed with water except on the sample well.
The battery icon on the display will blink when a low battery condition is detected.