Glossary ABS Acrylonitrile butadiene styrene is a common thermoplastic. ABS/LAS Alkyl benzene sulfonate / Linear alkyl sulfonate (detergents) Absorbance Absorption of light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices. Accuracy The accuracy of an analytical procedure expresses the closeness of agreement between the value which is accepted either as a conventional true value or an accepted reference value and the value found. AISI The American Iron and Steel Institute. Alkalinity The quantitative capacity of a water sample to neutralize an acid to a set pH. Analytical Procedure The analytical procedure refers to the way of performing the analysis. This may include but is not limited to: the sample, the reference standard and the reagents preparations, use of the apparatus, generation of the calibration curve, use of the formula for the calculation, etc. Amphel® Hanna AmpHel electrodes incorporate a miniaturized amplifier which resolves most of the problems associated with high impedance signals. The amplifier circuitry is located right on top of the electrode and is completely sealed. As a result, a strong, low impedance signal is emitted and ordinary connectors with long unshielded cables can be used. This breakthrough technology provides a stable signal for industrial monitoring as well as a major saving in low noise coaxial cable costs. In some cases, the need for a transmitter is also eliminated, resulting in further cost reductions. AOAC Association of Official Analytical Chemists ASBC American Society of Brewing Chemists. ASTM American Society for Testing and Materials. ATC Automatically Temperature Compensation. Auto-feedback With a Hanna magnetic stirrer incorporating auto-feedback, any change in viscosity or volume of the solution is automatically compensated for to keep the speed constant. Backlight A form of illumination used in LCD’s; backlights illuminate the LCD from the side or back of the display panel. Backpack Lab® Backpack Lab from Hanna are portable student laboratories that include a collection of well constructed lessons and activities, testing instruments, and kits for use by educators and students of environmental science. °Baumé The Baumé scale is used to measure density of various liquids. Notated variously as degrees Baume, degrees Baumé, B°, Be°, Bé, Baume. BEPS Battery Error Prevention System. Alerts the user in the event that low battery power could adversely affect readings BNC Connector Bayonet Neill-Concelman connector is a common type of radiofrequency connector used for the coaxial cable which connects various devices; usually is applied for frequencies below 3 GHz. BOD Biochemical Oxygen Demand (BOD) gives an indication of the biodegradable organic material present in a sample of water. The dissolved oxygen concentration is measured before and after an incubation period of 5 days and the BOD is calculated in mg/L from the difference. % Brix Degrees Brix is a unit representative of the sugar content of an aqueous solution. One degree Brix corresponds to 1 gram of sucrose in 100 grams of solution (% w/w). °C Celsius temperature degree; °C = (°F-32) / 5/9 CAL Check™ With the Hanna exclusive CAL Check validation function, users are able to verify the performance of the instrument at any time. Taking just a few short steps, the validation procedure is extremely user friendly and ensures that the meter is properly calibrated. 16 Glossary 16.6 | www.hannainst.com
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