User manual HANNA INSTRUMENTS C 221

[. . . ] If the cap is properly installed, then contact your dealer or the nearest Hanna Customer Service Center. Contact your dealer or the nearest Hanna Customer Service Center. C 221 Honey Color Analyzer General Description www. hannainst. com This Instrument is in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com or call 1-800-426-6287. [. . . ] The meters have an auto-shut off feature that will turn the instrument off after 10 minutes of non-use. REQUIRED STANDARD FRONT PANEL 1) 2) 3) 4) 5) Cuvet Holder Dual Level Liquid Crystal Display (LCD) READ key, to perform measurement CAL key, to calibrate the meter prior to measurement ON/OFF key, to turn the meter on and off Significance and Use Honey color varies naturally in a wide range of tonalities, ranging from light yellow to amber, dark amber and black in extreme cases; sometimes green or red hues may also occur. Color of untreated honey depends on botanical origin: for this reason color is very important for definition and commercial classification of monofloral honeys. Honey darkens with ageing, and other changes in color may result from beekeeper's interventions and from the different ways of conservation (e. g. : use of old honeycombs, contact with metals, high temperatures, exposition to light, etc. ). The primary characteristic for commercial honey classification is color. Color classes are expressed in millimeters (mm) Pfund grades, compared to an analytical grade Glycerol Standard Reference. Table 1 reports the USDA classification for honey samples and the related mm Pfund values. Table 2 shows the color of different monofloral honeys: data are obtained from a statistical set of honey samples. The table reports for each type of honey: average value of color, standard deviation, and the minimum and maximum values measured. REAR PANEL 1) Power Supply 12 VDC 2. 5 Watt 2) RS 232 Socket 3) Batteries Compartment ERROR MESSAGES a) on zero reading: This indicates that the zeroing procedure failed due to a low signal-to-noise ratio. Please check that the sample does not contain any debris. There is not enough light to perform a measurement. Follow the instruction described in the measurement procedure for calibrating the meter. A blinking "0" indicates that the sample absorbs less light than the Glycerol Reference. 1) A flashing value of "150" (maximum measurable value) indicates an over range condition. Repeat the reading procedure. Tips for an Accurate Measurement The instructions listed below should be carefully followed during testing to ensure best accuracy. · Use matched square cuvets, having 4 clear faces and a 10 mm path length. · Whenever the cuvet is placed into the measurement cell, it must be dry outside, and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI 731318 or a lintfree cloth prior to insertion. If bubbles are present, tap the cuvet on the table to remove them. · Press CAL and "SIP" will blink on the display. · Add to a second clean cuvet about 4 mL of honey, up to 5 mm (0. 2") below the rim. [. . . ] · Then it will show a scrolling "c221 Hanna Inst" message. · To perform calibration, fill one cuvet with about 4 mL of Glycerol, up to 5 mm (0. 2") below the rim. Then put the light shield cap on. CE Declaration of Conformity ANALYSIS KIT C219 Kit Kit for Honey Color analysis, including 82 cuvets, 30 mL of Glycerol and two 5 mL syringe (75 tests average) Recommendations for Users Before using these products, make sure that they are entirely suitable for your specific application and for the environment in which they are used. Operation of these instruments may cause unacceptable interferences to other electronic equipments, this requiring the operator to take all necessary steps to correct interferences. [. . . ]