User manual HANNA INSTRUMENTS HI 96801

[. . . ] Key features include: · Dual-level LCD · Automatic Temperature Compensation (ATC) · Easy setup and storage · Battery operation with Low Power indicator (BEPS) · Automatically turns off after 3 minutes of non-use. TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 PRINCIPLE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] A result of this property is that light will "bend", or change direction, when it travels through a substance of different refractive index. When passing from a material with a higher to lower refractive index, there is a critical angle at which an incoming beam of light can no longer refract, but will instead be reflected off the interface. The critical angle can be used to easily calculate the refractive index according to the equation: FUNCTIONAL DESCRIPTION TOP VIEW sin (critical) = n2 / n1 Where n2 is the refractive index of the lower-density medium; n1 is the refractive index of the higher-density medium. In the HI 96801, light from an LED passes through a prism in contact with the sample. An image sensor determines the critical angle at which the light is no longer refracted through the sample. The HI 96801 automatically applies temperature compensation to the measurement and converts the refractive index of the sample to sucrose concentration in units of percent (by weight) Brix. 1. Battery Compartment 4 5 DISPLAY ELEMENTS ERROR MESSAGES Error Code Err Descript ion Genera l fa ilure. Sa mp le is rea d ing lower tha n the 0 % BRIX sta nd a rd used for meter ca lib ra tion. Temp era ture exceed s ATC low limit (10 °C) d uring ca lib ra tion. Temp era ture exceed s ATC hig h limit (40 °C) d uring ca lib ra tion. LO Top d isp la y HI Top d isp la y LO Top d isp la y Cal seg ment ON 1. 8. SETUP: Factory Calibration Tag Measurement in Progress Tag Battery (blinks when low battery condition detected) 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) HI Top d isp la y Cal seg ment ON t LO Top d isp la y Cal seg ment ON t HI Top d isp la y Cal seg ment ON Air Prism surfa ce insufficiently covered . Conta ct Ha nna . MEASUREMENT GUIDELINES · · · · Handle instrument carefully. Do not spray water to any part of instrument except the "sample well" located over the prism. This includes most organic solvents and extremely hot or cold solutions. Absorb sample on soft tissue and rinse sample well with deionized or distilled water between samples. Do not use metallic tools such as needles, spoons or tweezers as these will scratch the prism. Elt nLt Ba ttery seg ment b linking <5% of b a ttery life is rema ining . · · Temp era ture va lues a re b linking 0. 0° or 80. 0°C Temp era ture mea surement out of sa mp ling ra ng e (0. 0 to 80. 0°C). Conta ct Ha nna . ATC seg ment b linking SETUP seg ment b linking 6 7 CALIBRATION 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; a LCD segment followed by the percentage of remaining battery life. When LCD displays dashes, the instrument is ready. MEASUREMENT Verify the instrument has been calibrated before taking measurements. [. . . ] The total quantity can be scaled proportionally for smaller containers but accuracy may be sacrificed. Example with 25% Brix: %Brix g Sucrose 25 25. 000 g Water 75. 000 Total g Total 100. 000 BATTERY REPLACEMENT To replace the instrument's battery, follow these steps: · Turn the instrument OFF by pressing the ON/OFF key. · Turn instrument upside down and remove the battery cover by turning it counterclockwise. TO CHANGE TEMPERATURE UNITS To change the temperature measurement unit from Celsius to Fahrenheit (or vice versa), follow this procedure. Press and hold the ON/OFF key continuously for aproximately 15 seconds. The LCD will display the "all segment" screen followed by a screen with the model number on the primary display and the version number on the secondary display. [. . . ]