Instruction Manual HI 993310 Portable Water Conductivity & Soil Activity Meter www.hannainst.
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 correct use of the instrument, as well as a more precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. directives.
SOIL ACTIVITY SOIL ACTIVITY Plants absorb nutritive elements dissolved in irrigation water. The ion concentration of the soil solution depends on the type of soil. Soil can be rich or poor in nutrients depending on its chemical composition and its property in retaining water and chemical elements. For example, clay soil retains more water than sandy soil since it holds more cations and has a greater microporosity, so that there is a different availability of ions for the roots.
ORNAMENTAL PLANTS & FLOWERS Amaranthus Anthurium Azalea Begonia Chrysanthemum Croton Cyclamen Dahlia Dieffenbachia Dracaena Euphorbia Ficus Gerbera Kalanchoe Lilium Orchid Pelargonium Peperomia Philodendron Rose Saintpaulia Violet LAWN Lawn ORCHARD Apricot Orange Cherry Lemon Apple Walnut Pear Peach Plum Grapevine 6 IDEAL VALUES 0.4-0.6 0.2-0.4 0.3-0.5 0.3-0.6 0.4-0.7 0.2-0.4 0.4-0.6 0.4-0.5 0.4-0.6 0.2-0.4 0.4-0.6 0.4-0.7 0.4-0.6 0.2-0.5 0.3-0.6 0.2-0.4 0.2-0.4 0.3-0.5 0.4-0.6 0.2-0.5 0.3-0.5 0.2-0.
WATER CONDUCTIVITY NUTRITIVE SOLUTIONS The nutritive solutions constitute one of the most important factors in determining the plant’s growth and yield. Hence, putting the right solution at the plant’s disposal is indispensable to get the best result. Conductivity (EC) of nutritive solutions must be checked regularly to ensure that it agrees with plant’s requirements. The plants also have seasonal preferences, typically requiring lower concentrations in the summer.
Tolerance of some common plants to the soil conductivity (Ayers & Westcot, 1976). • EC0 = maximum of tolerated soil conductivity (salinity). • EC75 = with this soil conductivity value the 75% of the maximum yield is produced. • EC100 = minimum soil conductivity value, then the yield starts decreasing. ORCHARD EC0 (mS/cm) Grapevine 12 Orange & Lemon 8 Apple & Pear 8 Walnut 8 Plum 7 Peach 6.5 Apricot 6 VEGETABLES & HERBACEOUS CULTIVATIONS Melon 16 Spinach 15 Cauliflower 13.5 Tomato 12.
FUNCTIONAL DESCRIPTION SPECIFICATIONS Range Act. EC Resolution Act. EC Accuracy (@20°C/68°F) Typical EMC Deviation Calibration 1) 2) 3) 4) 5) 6) 7) Liquid Crystal Display (LCD) ON/OFF key Water Conductivity selection key Calibration knob Soil Activity selection key LED indicators Alarm LED 12 0.00 to 1.00 0.00 to 19.99 mS/cm 0.01 0.01 mS/cm ±2% F.S. (from 0 to 15.00 mS/cm) excluding probe error ±2 % F.S.
CALIBRATION OPERATIONAL GUIDE The soil activity range is calibrated by performing the calibration of the conductivity range. Should the soil activity measurements be not calibrated, contact the nearest Hanna service center for re-calibration. • Each meter is supplied complete with a 9V battery. Slide off the battery compartment cover on the back of the meter and install the battery while paying attention to its polarity.
Note: Before taking any soil measurement, it is recommended to rub the tip of the HI 76305 soil probe with fine sandpaper. • After measurements have been completed, switch the meter off, or it will automatically turn itself off after approximately 2 minutes of non-use. • Clean and dry the probes after use (see the below section). PROBE MAINTENANCE HI 76305 Clean the tip with fine sandpaper prior to each measurement. After use, dry the probe with a cloth.
OTHER PRODUCTS FROM HANNA ACCESSORIES CONDUCTIVITY CALIBRATION SOLUTIONS HI 7030L HI 7030M HI 7031L HI 7031M HI 7039L HI 7039M 12.88 mS/cm calibration solution, 500 mL bottle 12.88 mS/cm calibration solution, 230 mL bottle 1.41 mS/cm calibration solution, 500 mL bottle 1.41 mS/cm calibration solution, 230 mL bottle 5.00 mS/cm calibration solution, 500 mL bottle 5.
SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (21) 4584.2941 • Fax (21) 4584.2942 Japan: Tel. (03) 3258.9565 • Fax (03) 3258.9567 Korea: Tel. (02) 2278.5147 • Fax (02) 2264.1729 Malaysia: Tel. (603) 5638.9940 • Fax (603) 5638.9829 Singapore: Tel. 6296.
