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. This instrument is in compliance with the directives.
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna office immediately. The meter is supplied with: • HI 76304 plastic body, conductivity probe with built-in temperature sensor and 1 m (3.3’) cable • HI 76305 probe for direct soil measurements with stainless steel conic tip, built-in temperature sensor and 1 m (3.
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.
particularly sensitive to soil activity. They require a lower quantity of fertilizer because they utilize the reserve of nutrients in the seed. This is true even for resistant species such as sugar beet and alfalfa. Later on, plants can grow faster with proper fertilization, particularly in conjunction with optimum lighting and temperature. If slow releasing fertilizers are employed, their effectiveness can be regularly controlled by testing the soil activity.
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.
IDEAL VALUES VEGETABLES & HERBACEOUS CULTIVATIONS Asparagus Sugar beet Carrot Cauliflower Cucumber Onion Watermelon Cotton Lettuce Maize Egg plant Melon Bean Strawberry Wheat Oat Potato Pepper Pea Tomato Soybean Spinach Tobacco 0.2-0.4 0.3-0.5 0.2-0.4 0.3-0.5 0.3-0.5 0.2-0.5 0.2-0.4 0.2-0.4 0.3-0.5 0.3-0.5 0.2-0.4 0.2-0.4 0.2-0.4 0.2-0.4 0.2-0.4 0.2-0.4 0.2-0.5 0.2-0.4 0.2-0.3 0.2-0.6 0.2-0.3 0.2-0.4 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.
IRRIGATION WATER The irrigation water must be checked regularly, especially in the hydroponics industry. Conductivity is the most important parameter to check since plants can be seriously damaged by too high EC value. Water used for irrigation has been classified in four classes, depending on its conductivity: Class Class Class Class I II III IV EC < 0.75 mS/cm EC = 0.75 to 2.50 mS/cm EC = 2.50 to 4.00 mS/cm EC > 4.00 mS/cm Class I: This type of water can be used without any quantity limitation.
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.
How to prepare the saturated soil-paste samples for analysis A) Soil extraction: 1) Extract the soil as indicated below: - Take one sample for every 1000 m2 (0.25 acre) of homogeneous plot of land. - For smaller plots, at least 2 samples are recommended (the more samples are taken, the more representative the end-result will be). 2) Avoid extracting samples from soil showing obvious anomalies. Treat this type of soil separately. 3) Take the same quantity of soil for each sample.
FUNCTIONAL DESCRIPTION 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
SPECIFICATIONS Range Act. EC Resolution Act. EC Accuracy (@20°C/68°F) Typical EMC Deviation Calibration 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. Conductivity: Manual, single-point through knob Soil Activity: calibrated through the conductivity range calibration Temperature Automatic, from 0 °C to 50 °C Compensation with ß=2%/°C Probes (included) HI 76305 stainless steel conic tip, ATC probe for direct soil meas. with 1 m (3.
CALIBRATION 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. CALIBRATION PROCEDURE • Pour sufficient quantity of a conductivity calibration solution (e.g. HI 7030) into a beaker. If possible, use plastic beaker to minimize any EMC interference. • Immerse the conductivity probe in the solution (approximately 5 cm/2").
OPERATIONAL GUIDE • 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. • Connect the proper probe to the meter: use HI 76305 for measuring soil activity or HI 76304 for conductivity. • Securely connect the probe to the meter by aligning the pins with the socket and pushing the plug in. Always detach the probe by holding it by the connector (and not by the cable).
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.
BATTERY REPLACEMENT The instrument is powered by a 9 V battery and is provided with the Battery Error Prevention System (BEPS), which turns the unit off when a low battery signal is detected. When the remaining battery level is less than 10%, the “V” tag lights up on the display to indicate a low battery condition. It is recommended to replace the battery as soon as the low battery condition is detected. Remove the cover on the meter's back by applying pressure in the indicated direction.
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 5.00 mS/cm calibration solution, 230 mL bottle PROBES HI 76305 HI 76304 Direct soil probe with stainless steel conic tip, built-in temperature sensor and 1m (3.
OTHER PRODUCTS FROM HANNA • • • • • • • • • • • • • • • • • • CALIBRATION AND MAINTENANCE SOLUTIONS CHEMICAL TEST KITS CHLORINE METERS DISSOLVED OXYGEN METERS HYGROMETERS ION SPECIFIC METERS MAGNETIC STIRRERS Na/NaCl METERS pH/ORP METERS PROBES and ELECTRODES PUMPS REAGENTS SOFTWARE THERMOMETERS TITRATORS TRANSMITTERS TURBIDITY METERS Wide Range of Accessories Most Hanna meters are available in the following formats: • BENCH-TOP METERS • POCKET-SIZED METERS • PORTABLE METERS • PRINTING/LOGGING METERS • PR
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