Hanna Instruments HI 96785 - Manual (Page 3)

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GENERAL DESCRIPTION
ABBREVIATIONS
The HI 96785 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s
years of experience as a manufacturer of analytical instruments. It has the advanced optical
system based on two special tungsten lamps and two narrow band interference filters that allows
most accurate and repeatable readings. All instruments are factory calibrated and the electronic
and optical design minimizes the need of frequent calibration.
Display messages aid the user in routine operation. The meter has an auto-shut off feature that
will turn off the instrument after 10 minutes of non use in
measurement mode.
The meter uses an exclusive positive-locking system to ensure that the cuvette is in the same
position every time it is placed into the measurement cell.
The
HI 96785 measures the percent of light transmittance of honey compared to analytical
reagent grade glycerol. The instrument directly displays the measurement result expressed in
mm Pfund.
millivolts
milliliter
Liquid Crystal Display
milliliters Pfund
US Department of Agriculture mV:
mL:
LCD:
mm Pfund:
USDA:
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 aging, 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.
USDA Color Standards Designation Color Range Pfund Scale (mm)
Water White 8 or less
Extra White 8 to 17
White 17 to 34
Extra Light Amber 34 to 50
Light Amber 50 to 85
Amber 85 to 114
Dark Amber more than 114