User manual HANNA INSTRUMENTS C 215

[. . . ] Instruction Manual C 215 HI 83215 Grow Master Basic for Nutrient Analyses MANC215R6 01/05 w w w . h a n n a i n s t . c o m www. hannainst. com This Instrument is in Compliance with the CE Directives Dear Customer, Thank you for choosing a Hanna product. Please read this instruction manual carefully before using the meter. 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. [. . . ] Shortage or excess of even only one nutritive element may cause an imbalance in plant physiology and in the absorption of the other nutrients. Nutrients shortages may result in irregular plant growth, low resistance to diseases, scarce production both in quantity and quality, while nutrients excess may cause waste of fertilizer, pollution of the groundwater and the possible accumulation of dangerous substances in the crops produced. POTASSIUM LOW RANGE SPECIFICATIONS Range Resolution Accuracy Typical EMC Deviation Light Source Method 0. 0 to 20. 0 mg/L 0. 5 mg/L ±3. 0 mg/L ±7% of reading ±0. 5 mg/L Tungsten lamp with narrow band interference filter @ 610 nm Adaptation of the Turbidimetric Tetraphenylborate method. The reaction between Potassium and reagents causes turbidity in the sample. Description Potassium Reagent Powder Reagent Quantity 6 drops 1 packet REQUIRED REAGENTS Code HI 93750A-0 A HI 93750B-0 B NITROGEN Nitrogen (N) is mostly absorbed by plants as nitrates (NO3-) and, in smaller amount, in the form of ammonium (NH4+). In hydroponics, an adequate ratio between the two forms is generally used in nutritive solutions. PRESENT IN ACTION proteins, enzymes, chlorophyll, hormones, vitamins, DNA and RNA · is fundamental for plants in phase of growth · promotes the lengthening of trunks and sprouts · increases the production of foliage · helps to absorb other nutrients (in particular phosphorus) · assists a bigger production for both size and number of fruits · slower growth · smaller leaves · yellowing of leaves · smaller fruits · premature ripening · reduction in resistance to diseases and atmospheric agents · increase of water demand (caused by an excessive production of leaves) · bad quality of fruits · delayed ripening · reduction in potassium absorption REAGENT SETS HI 93750-01 Reagents for 100 tests HI 93750-03 Reagents for 300 tests For other accessories see page 48. MEASUREMENT PROCEDURE Note: for sample preparation follow the IRRIGATION WATER (LR) procedure at page 17. · Select the program number corresponding to Potassium LR on the secondary LCD by pressing PROGRAM M and L. · Fill the cuvet with 10 mL of sample, up to the mark. m L 1 0 SHORTAGE EFFECTS EXCESS EFFECTS · Add six drops of HI 93750A, replace the cap and swirl the solution. x 6 · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. 14 39 Potassium LR · Wait for a few seconds and the display will show "-0. 0-". Now the meter is zeroed and ready for measurement. · Add 10 drops of HI 93706A Molybdate reagent. PHOSPHORUS Phosphorus (P) has an important role in many fundamental biochemical and physiological processes. Plants take up phosphorus in the form of phosphate ion (PO43-). PRESENT IN ACTION x 1 0 · Add the content of one packet of HI 93706B-0 Phosphorus Reagent B (Amino Acid) to the cuvet. Replace the cap and shake gently until dissolution is complete. SHORTAGE EFFECTS EXCESS EFFECTS · Reinsert the cuvet into the instrument. DNA and RNA, ATP, ADP · stimulates the roots growth · stimulates blooming · stimulates fecundation and ripeness · strengthens the plant tissues · is necessary in the formation of seeds · delayed ripening · slower growth · small leaves · decrease of production (smaller fruits and difficult seeds formation) · reduction of root system · premature ripening · excess of fruit-setting · negative effects on the absorption of some microelements such as iron, zinc, boron and copper POTASSIUM · Press TIMER and the display will show the countdown prior to the measurement or, alternatively, wait for 5 minutes and press READ DIRECT. In both cases "SIP" will blink during measurement. Potassium (K) is essential in proteic synthesis. The problem of lack of potassium is quite frequent in calcareous soils. Potassium is absorbed as K+. PRESENT IN ACTION tissues responsible for the growth of plants (primary and secondary meristems), embryos and cell vacuole · improves the quality of fruits and flowers · gives more resistance both to frost and to diseases caused by fungi (increases the cuticular thickness) · regulates the cellular turgidity (helps to regulate the osmotic processes and increases the resistance to dryness) · regulates the stomatic opening and closing (it means a strong influence on transpiration and photosynthesis) · slower growth · smaller fruits, less colored and less preserved · increase of transpiration · less resistance to the cold · The instrument directly displays concentration in mg/L of phosphorus on the Liquid Crystal Display. · To convert the reading to mg/L of phosphate (PO43­), multiply by a factor of 3. 07. INTERFERENCES Calcium above 10000 mg/L as CaCO3 Chloride above 150000 mg/L as Cl­ Ferrous iron above 100 mg/L Magnesium above 40000 mg/L as CaCO3 Sulfide Phosphorus HR SHORTAGE EFFECTS 38 15 EXCESS EFFECTS · reduced absorption of calcium and magnesium · increase of water consumption · increase of the substrate salinity PHOSPHORUS HIGH RANGE SPECIFICATIONS Range Resolution Accuracy Typical EMC Dev. Light Source Method 0 to 100 mg/L 1 mg/L ±5 mg/L ±4% of reading ±1 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, Amino Acid method. The reaction between phosphorus and reagents causes a blue tint in the sample. Description Molybdate Amino Acid Powder Quantity 10 drops 1 packet IRRIGATION WATER (LOW RANGE) In agricultural areas it is quite common to find altered values in the chemical composition of irrigation waters. The problem concerns mostly the high nitrate concentration, usually determined by excessive fertilization or irrational liquid manure spreading. The analysis of irrigation waters allows us to find out which are the substances present in major or minor quantity and to organize an advantageous fertilization plan. For example, if the quantity of water utilized for crop cultivation is 250 mm/ha (= 2500000 L/ha) and the nitrate (NO3-) concentration is 150 mg/L (34 mg/L as nitrate-nitrogen NO3-N), soil receives 85 kg/ ha of nitrogen. [. . . ] The reaction between ammonia and reagents causes a yellow tint in the sample. Description First Reagent Second Reagent Quantity 4 drops (6 drops in seawater) 4 drops (10 drops in seawater) REQUIRED REAGENTS Code HI 93715A-0 HI 93715B-0 REAGENT SETS HI 93715-01 Reagents for 100 tests HI 93715-03 Reagents for 300 tests For other accessories see page 48. MEASUREMENT PROCEDURE Note: for sample preparation follow the NUTRIENTS SOLUTION (HR) procedure at page 19. · Select the program number corresponding to Ammonia HR on the secondary LCD by pressing PROGRAM M and L. · Fill the cuvet with 10 mL of sample, up to the mark, and replace the cap. [. . . ]