User manual HANNA INSTRUMENTS HI 83225

[. . . ] Instruction Manual HI 83225 Grow Master for Nutrient Analyses MAN83225R1 04/05 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. 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. These instruments are in compliance with directives. HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. [. . . ] · young leafs become distorted · bud development is inhibited · root tips often die · plant growth stunted with short internodes · no consistent visual symptoms, usually associated with excess carbonates REQUIRED REAGENTS Code HI 93750A-0 A HI 93750B-0 B Description Potassium Reagent Powder Reagent Quantity 6 drops 1 packet SHORTAGE EFFECTS REAGENT SETS HI 93750-01 Reagents for 100 tests HI 93750-03 Reagents for 300 tests For other accessories see page 56. EXCESS EFFECTS MEASUREMENT PROCEDURE Note: for sample preparation follow the IRRIGATION WATER (LR) procedure at page 19. · Select the program number 10 "Potassium LR" on the secondary LCD by pressing PROGRAM M and L. · Fill the cuvet with 10 mL of sample, up to the mark. 10 mL MAGNESIUM Magnesium (Mg) is essential for the formation of chlorophyll and it stimulates the absorption of phosphorus by plants. PRESENT IN ACTION chlorophyll · it acts similar like calcium · is present in chlorophyll and pectin · it stimulates absorption of phosphourus · interveinal chlorosis which first develops in older leaves · small veins and not green · severe starvation, older leaves shrivel and die · very little information available on visual symptoms SHORTAGE EFFECTS · Add six drops of HI 93750A, replace the cap and swirl the solution. x6 EXCESS EFFECTS · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. 16 45 Potassium LR · Wait for a few seconds and the display will show "-0. 0-". · Add 10 drops of HI 93706A Molybdate reagent. x 10 SULPHUR Sulphur (S) is a constituent of plant proteins and hormones. PRESENT IN ACTION SHORTAGE EFFECTS proteins, hormones, vitamins and essential oils · plant metabolism · stimulates absorption of atmospheric nitrogen · upper leaves remain small, and curl downward · yellowing of younger leaves · leave symptoms often absent or poor defined · sometimes interveinal yellowing and burning · Add the content of one packet of HI 93706B Phosphorus Reagent B (Amino Acid) to the cuvet. Replace the cap and shake gently until dissolution is complete. EXCESS EFFECTS · reduction of growth and leave size · Reinsert the cuvet into the instrument. · 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. · The instrument directly displays concentration in mg/L of phosphorus (P) 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 44 17 WATER AND NUTRIENT MANAGEMENT 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. In choosing type and quantity of fertilizer to be used, it is important to consider this information, in order not to waste fertilizer nor to induce soil pollution. PHOSPHORUS HIGH RANGE SPECIFICATIONS Range Resolution Accuracy Light Source Method 0 to 100 mg/L 1 mg/L ±5 mg/L ±4% of reading 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 REQUIRED REAGENTS Code HI 93706A-0 HI 93706B-0 REAGENT SETS NUTRIENTS SOLUTIONS (MEDIUM AND HIGH RANGE) The nutrients requirements of the plants are determined by the type of plant, its age and the environmental conditions. The control of chemical composition of nutrients solutions given to the plants is an operation that allows a correct preparation of the fertilizer. In analyzing the solution, it is possible to choose between medium range and high range values, depending on the concentration of substances. Medium range usually covers the analysis of residual solutions in recycling systems. The nutritive elements are differently absorbed by the plants, hence the nutrient solution loses substances, becomes impoverished and must be enriched. High range normally corresponds to the typical values of nutrients solutions. It is therefore possible to verify that the solution given to the plants contains the correct quantities of nutritive substances. HI 93706-01 Reagents for 100 tests HI 93706-03 Reagents for 300 tests For other accessories see page 56. MEASUREMENT PROCEDURE Note: for sample preparation follow the NUTRIENTS SOLUTION (HR) procedure at page 21. [. . . ] · Select the program number 4 "Nitrate LR" on the secondary LCD by pressing PROGRAM M and L. · Using the pipette, fill the cuvet with 6mL of sample, up to half of its height, and replace the cap. · Place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove. · Wait for a few seconds and the display will show "-0. 0-". [. . . ]