User manual HANNA INSTRUMENTS HI 96821

[. . . ] 5 DISPLAY ELEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 MEASUREMENT GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 CALIBRATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 MEASUREMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Battery Cover 10. Battery Compartment 5 DISPLAY ELEMENTS 1. 9. Battery (blinks when low battery condition detected) Measurement in Progress Tag SETUP: Factory Calibration Tag CAL: Calibration Tag Automatic Temperature Compensation (blinks when temperature exceeds 10-40°C / 50-104°F range) Primary Display (displays measurement and error messages) Temperature Units Secondary Display (displays temperature measurements; when blinking, temperature has exceeded operation range: 0-80°C / 32-176°F) Range indicator MEASUREMENT GUIDELINES · · · · · · · Handle instrument carefully. Do not spray water to any part of instrument except the "sample well" located over the prism. The instrument is intended to measure sodium chloride solutions. Do not expose instrument or prism to solvents that will damage it. This includes most organic solvents and extremely hot or cold solutions. Particulate matter in a sample may scratch the prism. Absorb sample on soft tissue and rinse sample well with deionized or distilled water between samples. Use plastic pipettes to transfer all solutions. Do not use metallic tools such as needles, spoons or tweezers as these will scratch the prism. Cover sample well with hand if measuring in direct sun. 6 CALIBRATION PROCEDURE Calibration should be performed daily, before measurements are made, when the battery has been replaced, or between a long series of measurements. Two instrument test screens will be displayed briefly; all LCD segments followed by the percentage of remaining battery life. It will briefly display an indication of the measurement units set. When the LCD displays dashes, the instrument is ready. 2. Using a plastic pipette, fill the sample well with distilled or deionized water. Make sure the prism is completely covered. Note: If the ZERO sample is subject to intense light such as sunlight or another strong source, cover the sample well with your hand or other shade during the calibration. If no error messages appear, your unit is calibrated. (For a description of ERROR MESSAGES see page 11). Note: The 0. 0 screen will remain until a sample is measured or the instrument is turned off. Gently absorb the ZERO water standard with a soft tissue. Use care not to scratch the prism surface. The instrument is ready for sample measurement. [. . . ] · Turn instrument upside down and remove the battery cover by turning it counterclockwise. · Extract the battery from its location. · Replace with a new 9V battery making sure to observe polarity. · Insert the back battery cover and fasten it by turning clockwise to engage. WARRANTY The HI 96821 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement free of charge. [. . . ]