Glossary EC Electrical conductivity is a measure of how well a material accommodates the transport of electric charge. Its SI derived unit is the Siemens per meter, (A2s3m-3kg-1) (named after Werner von Siemens). It is the ratio of the current density to the electric field strength. This applies also to the electrolytic conductivity of a fluid. EDTA Edetic acid; etylenediaminetetraacetic acid EES Sodium exchangeable ( in meq/100 g soil) Electromagnetic Compatibility See page 16.4 Electromagnetic Interferences (EMI) See page 16.4 EPA (U.S. EPA) United States Environmental Protection Agency °F Fahrenheit temperature degree; °F = °C x 9/5 + 32 FAO Food and Agriculture Organization Fast Tracker™—Tag Identification System Hanna’s Fact Tracker™—Tag Identification System simplifies test logging. iButton®s with a unique ID can be installed at various sampling sites. When the matching connector on the meter contacts the location button, measurements are logged and labeled with the alphanumeric user-entered location ID. Location, date, time and measurements are logged into the meter which can be transferred to a PC. FDA US Food & Drug Administration. FDA bottle = bottles that meet FDA Standards. Filling Solution Solution containing the anion to which the reference electrode of the operational pH cell is reversible, eg. Chloride for Ag-AgCl electrodes. FNU Formazin Nephelometric Unit. FTU Formazin Turbidity Unit. F.S. (or f.s.) Full scale Glass Membrane Hanna utilizes four different types of pH sensitive glass to cover a vast number of applications. Our manufacturing processes are specific for each pH electrode design. For instance, some electrodes with low impedance glass are particularly suited at performing measurements in solutions with low conductivity or cold solutions. For industrial grade electrodes, Hanna produces a specific range of sensitive glass that guarantees a linear response over a wide pH range as well as being resistant to harsh environments. To optimize a pH measurement for a particular application, the pH glass characteristics are considered, as well as materials of construction including reference junctions, wetted materials and internal seals. Hanna provides the best materials and performance for a particular application to ensure reliable measurements. GP General Purpose HT High Temperature LT Low Temperature HF Samples with Fluoride GLP Good Laboratory Practice. The phrase good laboratory practice especially refers to a Quality System concerned with the organizational process and the conditions under which non-clinical health and environmental safety studies are planned, performed, monitored, recorded, archived and reported. GP Glass Hanna’s GP (general purpose) hydrogen sensitive glass provides the best response over the entire pH range and can be used for a wide range of applications. Great results are obtained with sphere geometry with diameter of 9.5 mm (0.37’’). This achieves a system with 100 MΩ, impedance. The GP glass is also used on smaller diameter spheres. GPS Global Positioning System GR Gypsum Requirement (metric ton/ha or ton/acre). H₂T Tartaric Acid. HACCP Hazard Analysis and Critical Control Points. HC Handheld Colorimeter. 16 Glossary 16.9 www.hannainst.com |
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