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Summary of Contents for Hanna Instruments HI99121
- Page 1 HI99121 Direct Soil pH Portable Meter...
- Page 2 If you need additional technical information, do not hesitate to e‑mail us at tech@hannainst.com or view our worldwide contact list at www.hannainst.com. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
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Page 3: Table Of Contents
Table of Contents ........................ Preliminary Examination ..................... General Description and Intended Use .................. Main Features ........................Specifications ........................Display Description ......................Operational Guide ......................Meter Setup ........................Soil pH ..........................Organic Substrate ....................... Irrigation Water ........................Nutrient Solution ........................ Battery Replacement ......................Electrode Maintenance ...................... - Page 4 Note: Save all packing material until you are sure that the meter functions correctly. All defective items must be returned in the original packing together with the supplied accessories. HI99121 is the perfect portable pH meter for soil testing. With the...
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Page 5: Main Features
Main features: • Simultaneous pH and temperature measurements on a large dual‑line LCD display • Automatic pH calibration at one or two points within two memorized buffer sets (standard or NIST) • Selectable temperature unit (°C or °F) • Electrode condition indicator •... - Page 6 ‑2.00 to 16.00 pH / ‑2.0 to 16.0 pH Range* ±825 mV (pH‑mV) ‑5.0 to 105.0 °C/23.0 to 221.0 °F 0.01 pH / 0.1 pH Resolution 1 mV 0.1 °C/0.1 °F ±0.02 pH / ±0.1 pH Accuracy ±1 mV (pH‑mV) ±0.5 °C up to 60 °C;...
- Page 7 8 Temperature unit 9 Secondary LCD 10 Meter modes indicator 11 pH calibration buffer(s) used Each meter is supplied with batteries. Before using the meter for the first time, open the battery compartment and insert batteries, observing the polarity (see “Battery Replacement“). TO CONNECT THE ELECTRODE With the meter turned off, connect the HI12923...
- Page 8 TO FREEZE THE MEASUREMENT VALUES While in measurement mode, press and hold the SET button until “HOLD“ appears on the second‑ ary LCD. The “HOLD“ remains for 1 second and reading of pH, mV and temperature will be frozen on the LCD with “H” blinking. →...
- Page 9 pH calibration Enter calibration mode while in pH measurement mode. Place the sensor into the first calibration buffer. If performing a two‑point calibration, use pH 7.01 (pH 6.86 for NIST) buffer first. The meter will enter the calibration mode, display‑ ing “pH 7.01 USE”...
- Page 10 ELECTRODE CONDITION The display is provided with a probe icon (unless the feature is disabled from setup) which indicates the electrode status after calibration. The “condition” remains active for 12 hours (unless the batteries are removed). The electrode condition is evaluated only if the current calibration has two points. 5 bars: excellent condition 4 bars: very good condition 3 bars: good condition...
- Page 11 Setup mode allows the selection of the Temperature unit, Auto‑off, Beep, the type of pH buffer set, the Resolution and Information. To enter Setup mode press and hold button until “STD“ and tag is replaced by “SETUP“ and tag. Release the button. •...
- Page 12 pH is the measure of the hydrogen ion concentration [H ]. The pH scale goes from 0 (very acidic) to 14 (basic) with pH 7 being neutral. Soil can be acid, neutral or alkaline. 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;...
- Page 13 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 example, 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.
- Page 14 Different naturally occurring minerals may effect soil pH the same way, but the method for correction may differ. Take for example elevated soil pH: ‑ Soils rich with limestone: Add organic matter (non‑organic ameliorants such as sulfur and sulfuric acid might not make economic sense due to the large quantities needed).
- Page 15 For best results, it is advisable to measure the pH of a soil solution, using a sample of soil and soil preparation solution HI7051. 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) Verify meter is set up corectly and pH electrode is calibrated.
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Page 16: Organic Substrate
The pH measurement 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). -
Page 17: Nutrient Solution
A rational fertilization program is required for optimum plant 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. - Page 18 LAWN Preferred pH Range Lawn 6‑7.5 GARDEN PLANTS AND FLOWERS Preferred pH Range Preferred pH Range Acacia 6‑8 Ligustrum 5‑7.5 Acanthus 6‑7 Magnolia 5‑6 Amaranth 6‑6.5 Narcissus 6‑8,5 Bougainvillea 5.5‑7.5 Oleander 6‑7.5 Dahlia 6‑7.5 Paulownia 6‑8 Erica 4.5‑6 Portulaca 5.5‑7.5 Euphorbia 6‑7 Primula...
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Page 19: Battery Replacement
Dieffenbachia 5‑6 Philodendron 5‑6 Dracaena 5‑6 Yucca 6‑7.5 Freesia 6‑7.5 Table 3. Optimum pH for various Plants. BATTERY REPLACEMENT When the remaining battery life is less than 10% the battery tag blinks on the display to warn the user. Battery Error Prevention System (BEPS) If the battery is too weak (“0%”) the display shows “bAtt“, “DEAD“... - Page 20 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 dirt that has to be removed from the electrode.
- Page 21 Glass body, pre‑amplified pH electrode for soil measurement with internal temperature HI12923 sensor, DIN connector and 1 m (3.3’) cable HI7004L pH 4.01 buffer solution, 500 mL HI7006L pH 6.86 buffer solution, 500 mL HI7007L pH 7.01 buffer solution, 500 mL HI7009L pH 9.18 buffer solution, 500 mL HI7010L...
- Page 22 All Hanna Instruments conform to the CE European Directives. RoHS compliant Disposal of Electrical & Electronic Equipment. The product should not be treated as household waste. Instead hand it over to the appropriate collection point for the recycling of electrical and electronic equipment which will conserve natural resources.
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Page 23: Recommendation For Users
Technical Service department and then send it with shipping costs prepaid. When shipping any meter, make sure it is properly packed for complete protection. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice. - Page 24 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com Local Office Hanna Instruments Inc. 270 George Washington Highway Smithfield, RI 02917 Phone: 800.426.6287 Fax: 401.765.7575 e‑mail: tech@hannainst.com MAN99121N Printed in ROMANIA...
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