HI 99121 Soil pH Test Kit
Contents
1. Orchards from 20 to 60 cm of depth 8 to 24 5 Spread the soil samples on the pages of a newspaper and let the soil dry a shady place or put it in an oven at 40 C 6 Crumble the dried soil and mix all the samples together to obtain a homogeneous mixture discarding stones and vegetable residues 7 From this mixture take the soil sample for analysis B Soil solution preparation and measurement 1 Sift the soil at 2 mm 2 Weigh 10 g of soil and put it in 25 ml of soil preparation solution 7051 use the apposite beaker or 20 of soil per 50 ml of soil preparation solution HI 7051 3 Mix for 30 seconds 4 Wait for about 5 minutes 5 Mix again and measure the pH of the solution ORGANIC SUBSTRATE pH measurements of organic substrates is important in greenhouses and nursery growing pots pH should be checked at the outset to make sure that the pH of the substrate bought is that desired pH can change if too much time elapses from the date of packaging to the moment of utilization A Direct measurement in pot If the substrate is dry add a little distilled water Insert the electrode into the soil and take measurement B Measurement of the organic substrate solution 1 2 Let the substrate dry and discard the coarse vegetable residues and pebbles Prepare a solution composed of 1 part of mould and 2 parts of HI 7051 solution for example fill the beaker with the substrate up to 50 ml press it gently2. and carefully replace the 3 AA batteries located in the battery com partment while paying attention to their polarity Reattach the back making sure that the gasket is in place and tighten the 4 screws to ensure a watertight seal TECHNICAL SERVICE CONTACTS Australia Tel 03 9769 0666 Fax 03 9769 0699 China Tel 10 88570068 Fax 10 88570060 Egypt Tel amp 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 7118 Fax 6291 6906 South Africa Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061 United Kingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fax 401 765 7575 EXLTLO6NVW S0 60 For e mail contacts and complete list of Sales and Technical offices please see www hannainst com
3. the meter ON and check the battery status Press the ON OFF MODE button until the display lights up At Start up all the LCD segments are displayed for 1 second then the percent indication of the remaining battery life is shown for another second E g 100 BATT The meter then enters the normal measuring mode Note If the display needs to be checked keep the ON button pressed while turning the meter on The meter will display all segments as long as the button is pressed To freeze the display While in measurement mode press the SET HOLD button HOLD appears on the secondary display and the reading will be frozen on the LCD E g pH 5 73 HOLD Press any button to return to normal mode To turn the meter OFF While in normal measurement mode press the ON OFF MODE button OFF will appear on the secondary display Release the button Note The meteris provided with an acoustic signal feature which can be disabled using the switch located in the battery com partment Note When the meter detects the absence ofa temperature probe input the Automatic Temperature Compensation is turned off and the meter uses a default value of 25 C 77 F forthe temperature measurement and compensation In this condi tion the secondary LCD shows 25 0 C 77 0 F blinking When probe is connected the meter automatically retums to the ATC mode the ATC tag is turned on and the tempera ture is shown on the secondary d
4. CD shows the accepted value with the OK 2 message on the secondary display The meter then returns to the normal measuring mode Note When the calibration is completed the CAL tag is tumed on To quit calibration and to reset to the default values After entering the calibration mode and before the first pointis ac cepted itis possible to quit the procedure and return to the last calibration data by pressing ON OFF MODE The secondary LCD displays ESC for1 sec and the meter returns to normal mode To reset to the default values and clear previous calibration press the SET HOLD button after entering the calibration mode and before the first pointis accepted The secondary LCD displays CLR for 1 sec the meter resets to the default calibration and the CAL tag on the LCD disappears METER SETUP Setup mode allows to selectthe temperature unit and the pH buffer set To enter the Setup mode press amp hold ON OFF MODE until CAL on the secondary display is replaced by TEMP and the current temperature unit E g TEMP C Then for selection use the SET HOLD button After the tem perature unit has been selected press ON OFF MODE to enter the buffer set selection mode press ON OFF MODE twice to return to the normal measuring mode to change the calibration buffer set after setting the tempera ture unit the meter will show the current buffer set pH 7 01 BUFF for 4 01 7 01 10 01 or pH 6 86 BUFF fo
5. ER SPECIFICATIONS Automatic temperature Measuring unit compensation indicator for primary display Stability ATC pH Primary indicator 8 display Battery Secondary percentage display pH calibration M Selectable indicator 5 VIN VAN IN temperature Low battery indicator Range 2 00 to 16 00 pH 5 0 to 105 0 C 23 0 to 221 0 F Resolution 0 01 pH 0 1 0 1 F Accuracy 0 02 pH 20 C 68 F 0 5 C up to 60 C 1 C outside 1 F up to 140 F 2 F outside Temperature Compensation Automatic pH Calibration Automatic 1 or 2 point with 2 sets of memorized buffers Probe included HI 1292D pH temperature probe Battery Type Life 3x 1 5V AA IEC LR6 approx 1500 hours Auto off After 8 minutes of non use Environment 0 to 50 C 32 to 122 F RH 100 Dimensions 150 x 80 x 36 mm 5 9 3 2 1 4 Weight 2109 7 4 02 The temperature range is limited to 80 176 if using the HI1292D probe To clean the meter use water only 11 OPERATING THE METER To connect the probe With the meter turned off connectthe HI 1292D probe to the DIN socket on the top of the meter by aligning the pins and pushing in the plug Tighten the nutto ensure a good connection Remove the protective cap from the probe before taking any measure ments To turn
6. Instruction Manual 99121 Soil pH Test Kit 5 Dear Customer Thank you for choosing a HANNA instruments product Please read this instruction manual carefully before using the instrument 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 TABLE OF CONTENTS PRELIMINARY EXAMINATION 3 WARRANTY 3 SOIL pH 4 ORGANIC SUBSTRATE 8 IRRIGATION WATER 8 NUTRIENT SOLUTION 8 METER SPECIFICATIONS 11 OPERATING THE pH METER 12 MEASUREMENT amp CALIBRATION 13 METER SETUP 14 ELECTRODE CLEANING 15 BATTERY REPLACEMENT 15 2 PRELIMINARY EXAMINATION Remove the test kit from the packing material and examine it carefully to make sure that no damage has occurred during shipping If there is any damage immediately notify your dealer Each kit includes HI 99121 port
7. able pH meter e 12920 pH electrode pH 4 01 amp pH 7 01 buffer solutions 20 mL each HI 700663 cleaning solution for inorganic soil deposits HI 700664 cleaning solution for organic soil deposits e 705118 preparation solution HI 721319 ground auger 3x 1 5V AA alkaline batteries e instruction manual rugged carrying case Note Save all packing material until you are sure that the instrument functions correctly All defective items must be returned in the original packing with the supplied accessories WARRANTY All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions The probes are warranted for a period of six months This warranty is limited to repair or replacement free of charge Damage due to accidents misuse tampering or lack of prescribed maintenance are not covered If service is required contact the dealer from whom you purchased the instrument If under warranty report the model number date of purchase serial number and the nature of the problem First obtain a Returned Goods Authorization number from the Cus tomer Service department then return the instrument with the Authorization number included along with shipment costs prepaid If the repair is not covered by the warranty you will be notified of the charges When shipping any instrument make sure itis p
8. ample iron copper and manganese are not soluble in an alkaline environment This means that plants needing these elements should theoretically be in an acidic type of soil Nitrogen phosphorus potassium and sulfur on the other hand are readily available in a pH range close to neutrality Furthermore abnormal pH values increase the concentration of toxic elements for plants For example in acid conditions there can be an excess of aluminum ions in such quantities that the plant can not tolerate Negative effects on chemical and physical structure are also present when pH values are too far from neutral conditions break up of aggregates a less permeable and more compact Soil Management of the soil in relation to the pH value Once the pH value is known it is advisable to choose crops that are suitable for this range e g in an acid soil cultivate rice potato strawberry Add fertilizers that do not increase acidity for example urea calcium nitrate ammonium nitrate and superphosphate or lower alkalinity e g ammonium sulfate It is recommended that a cost evaluation is made prior to commencement of the soil pH modification Corrective substances can be added to modify the soil pH however the effects are generally slow and not persistent For example by adding lime the effects in clay soil can last for as long as 10 years but only 2 3 years in a sandy soil Foran acid soil we can use substances such as lime dolomiti
9. c limestone and marl according to the nature of the soil 1 SoilAmeliorants Clay soil Silty soil Sandy soil 30 50 20 30 10 20 Ca OH 39 66 26 39 13 26 CaMg CO 49 82 33 49 16 33 54 90 36 54 18 36 Tab 1 Quantity q na of pure compound necessary to in crease 1 unit of pH High pH levels can depend on different elements hence there are different methods for its correction Soils rich with limestone Add organic matter this is due to the fact that non organic ameliorants such as sulfur and sulfuric acid might not make economic sense due to the large quantities needed Alkaline saline soils Alkalinity is due to the presence of salts in particular a high concentration of sodium can be harmful Irrigation washes away salts hence an appropriate use of irrigation can provide positive results drop irrigation being the most recommended If alkalinity is caused by sodium it is recommended to add Substances such as gypsum calcium sulfate sulfur or other sulfuric compounds Tab 2 Also in this case a cost evaluation is necessary Soil ameliorants pure compounds Quantity kg Calcium chloride CaCl 2H 0 85 Sulfuric acid 50 57 Sulfur S 19 Iron sulfate Fe SO 7H 0 162 Aluminum sulfate Al 50 129 Tab 2 Quantities provide the same result as 100 kg of gypsum Procedure for direct ground measurement 1 Dig discarding 5 cm of topsoil 2 Perforate the soil wit
10. empty the content in another container and add 100 ml of HI 7051 solution Mix for 30 seconds and then wait for 5 minutes Mix again and measure the pH of the solution IRRIGATION WATER The quality of irrigation water is a very important factor If the pH value is very far from pH 7 it is possible that other anomalies are present Ranges for evaluation of water quality 6 to 8 5 pH good it can be utilized without problems 5 to 6 pH or 8 5 to 9 pH sufficient sensible crops could have problems 4 to 5 pH or 9 to 10 pH scarce use it carefully avoid wetting the vegetation pH lt 4 or pH gt 10 very scarce there are other anomalies that have to be identified via chemical analysis NUTRIENT SOLUTION A rational fertilization is needed for optimum plants growth in greenhouses The pH value of the nutrient solution water fertilizer has to meet the plants need If a fertirrigation system with automatic pH control is used ensure that it is functioning properly Check the pH of the irrigation solution as well as any recycled solution ORCHARD PLANTS Preferred pH Range Apple 5 6 5 Apricot 6 7 Cherry Grapefruit Grapevine Lemon Nectarine 5 5 AWA 27 27 7 7 27 5 Preferred pH Range Orange 5 7 Peach 6 7 5 Pear 6 7 5 Plum 6 7 5 Pomegranate 5 5 6 5 Walnut 6 8 VEGETABLES AND HERBACEOUS CULTIVATIONS Preferred pH Range Preferred pH Range Artichoke 6 5 7 5 Pepper 6 7 A
11. h HI 721319 soil drill to a depth of about 20 cm or more 3 If the soil is dry moisten it with a small amount of distilled water 4 Wash the electrode with tap water not distilled 5 Insert the electrode pushing it slightly into the soil to ensure proper contact 6 Observe the measurement 7 Wash the electrode with tap water not distilled and using a finger gently remove any soil remaining on the electrode avoid using a rag or cloth 8 Repeat the procedure in different locations in the field 9 Consider the average of the measured data For best result itis advisable to measure the pH of a soil solution using a sample of soil and soil preparation solution 7051 it is better to use this procedure if you have to test a stony field in which you risk damaging the electrode Procedure for the measurement of soil solution 1 2 5 A Sampling 1 Extracting Soil Sample Take 1 sample per 1000 m 0 25 acre of homogeneous area Even for small areas 2 samples are recommended the more the samples the better the end results because the result is more representative 2 Avoid extracting samples from soil presenting obvious anomalies and consider them separately 3 Sample quantity Take the same quantity of soil for each sample For example use bags with similar dimensions 1 bag per sample 4 Depth of extraction General dig and discard 5 cm 2 of topsoil Herbaceous crops from 20 to 40 of depth 8 to 16
12. isplay pH MEASUREMENT amp CALIBRATION Make sure the meter has been calibrated before use If the probe is dry soak it in HI 70300 storage solution for one hour to reactivate it Place the tip of the probe into the sample to be tested stir briefly and wait until the stability symbol on the LCD is turned off The LCD shows the pH value automatically compensated for temperature on the primary LCD while the secondary LCD shows the temperature of the solution lf measurements are taken in differentsamples successively rinse the probe tip thoroughly to avoid contaminations After cleaning rinse the probe tip with some of the sample to be measured pH calibration For better accuracy a frequent electrode cleaning see also pag 15 and meter calibration is recommended In addition the instrument must be recalibrated whenever a The pH electrode is replaced b After testing aggressive chemicals c Where high accuracy is required d Atleast once a month From normal mode press amp hold ON OFF MODE until OFF on the secondary display is replaced by CAL Release the button The LCD enters the calibration mode displaying pH 7 01 USE or pH 6 86 USE ifthe NIST buffer setwas selected After 1 second the meter activates the automatic buffer recognition fea ture If a valid buffer is detected then its value is shown on the primary display and REC appears on the secondary LCD If no valid buffer is detected the
13. meter keeps the USE indication active for 12 seconds and then replaces itwith WRNG indicat ing that the sample being measured is nota valid buffer For a single point calibration with buffers pH 4 01 9 18 or 10 01 the meter automatically accepts the calibration when the reading is stable the meter will show on the primary display the accepted buffer with the message OK 1 on the secondary display and an audible signal is produced After 1 second the meter automatically returns to the normal measuring mode If a single point calibration with buffers pH 7 01 or 6 86 is de sired then after the calibration pointhas been accepted press the ON OFF MODE button in order to return to the normal measuring mode After the button is pressed the meter shows 13 7 01 or 6 86 1 and an audible signal is produced After 1 second the meter automatically returns to the normal measuring mode Note Itis always recommended to carry outa two point calibra tion for better accuracy Fora two point calibration place the probe in pH 7 01 or pH 6 86 buffer After the calibration point has been accepted the pH 4 01 USE message appears The message is held 12 seconds unless a valid buffer is recognized If no valid buffer is recognized then the WRNG message is shown If a valid buffer pH 4 01 pH 10 01 or pH 9 18 is detected then the meter completes the calibration procedure When the buffer is accepted the L
14. r 4 01 6 86 9 18 Change the set with the SET HOLD button then press ON OFF MODE to return to normal mode 14 ELECTRODE CLEANING A frequent cleaning of the pH electrode is strongly recommended to ensure correct calibration and reliable readings Hanna Instruments has developed a complete series of cleaning solutions dedicated to specific applications and kind of dirty thathas to be removed from the electrode In soil measurements you can choose between two different solu tions accordingly to the type of tested soil HI 700663 is indicated for inorganic soil deposits as minerals limestone adsorbed clays e HI 700664 is specific for organic soil deposits humus Ifcleaning is performed frequently soak the electrode in the specific solution few minutes If the electrode has not be cleaned for a while for a complete removal of soil deposits proceed as follows e wipe the electrode body not bulb with paper or softtissue the reference with abrasive paper immerse into cleaning solution for atleast 15 minutes BATTERY REPLACEMENT The meter displays the remaining battery percentage when turned on When the level is below 5 the symbol on the bottom left of the LCD blinks to indicate a low battery condition If the battery level is low enough to cause erroneous readings the Battery Error Prevention System BEPS turns the meter off Unscrew the 4 screws located on the back of the meter
15. roperly packaged for complete protection SOIL pH is the measure of the hydrogen ion concentration Soil can be acid neutral or alkaline according to its pH value Fig 1 shows the relationship between the scale of pH and types of soil Most plants prefer a pH range from 5 5 to 7 5 but some species prefer more acid or alkaline soils Nevertheless every plant requires a particular range of pH for optimum growth 1 4 8 8 8 Fig 1 Types of soil according to the pH value pH strongly influences the availability of nutrients and the presence of microorganisms and plants in the soil For example fungi prefer acidic conditions whereas most bacteria especially those supplying nutrients to the plants have a preference for moderately acidic or slightly alkaline Soils In fact in strongly acidic conditions nitrogen fixing and the mineralization of vegetable residual is reduced Plants absorb the nutrients dissolved in the soil water and the nutrient solubility depends largely on the pH value Hence the availability of elements is different at different pH levels Fig 2 45 50 55 0 65 70 75 Fig 2 Solubility of the elements according to varying pH 4 Each plant needs elements in different quantities and this is the reason why each plant requires a particular range of pH to optimize its growth For ex
16. sparagus 6 8 Early Potato 4 5 6 Barley 6 7 Late Potato 4 5 6 Bean 6 7 5 Sweet Potato 5 5 6 Brussels Sprout 6 7 5 5 5 7 5 Early carrot 5 5 7 5 6 5 Late carrot 5 5 7 Soybean 5 5 6 5 Cucumber 5 5 7 5 Spinach 6 7 5 Egg Plant 5 5 7 Strawberry 5 7 5 Lettuce 6 7 String 6 7 5 Maize 6 7 5 Sugar beet 6 7 Melon 5 5 6 5 Sunflower 6 7 5 Oat 6 7 Tomato 5 5 6 5 Onion 6 7 Watermelon 5 5 6 5 Pea 6 7 5 Wheat 6 7 LAWN Preferred pH Range Lawn 6 7 5 GARDEN PLANTS AND FLOWERS Preferred pH Range Acacia 6 8 Acanthus 6 7 Amaranth 6 6 5 Bougainvillea 5 5 7 5 Dahlia 6 7 5 Erica 4 5 6 Euphorbia 6 7 Fuchsia 5 5 7 5 Gentian 5 7 5 Gladiolus 6 7 ellebore 6 7 5 yacinth 6 5 7 5 ris 5 6 5 Juniper 5 6 5 Preferred pH Range Ligustrum 5 7 5 Magnolia 5 6 arcissus 6 8 5 Oleander 6 7 5 Paulownia 6 8 Portulaca 5 5 7 5 Primula 6 7 5 Rhododendron 4 5 6 Roses 5 5 7 Sedum 6 7 5 Sunflower 5 7 Tulip 6 7 Viola 5 5 6 5 HOUSE PLANTS Preferred pH Range Abutilon African violet Anthurium Araucaria Azalea Begonia Camellia Croton Cyclamen Dieffenbachia Dracaena Freesia 5 5 6 5 Gardenia Geranium Hibiscus Jasmine Kalanchoe Mimosa Orchid Palms Peperomia Philodendron Yucca 5 tr No an 6 Preferred pH Range 5 6 ON o wr 0 pH MET
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