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Summary of Contents for Hanna Instruments HI99121
- Page 1 HI99121 Waterproof pH & Temperature Meter for Direct Measurement in Soil...
- 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
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......................Accessories ......................... Electrode maintenance ......................Certification ........................ -
Page 4: Preliminary Examination
PRELIMINARY EXAMINATION Remove the instrument and accessories from the packaging and examine it carefully to make sure that no damage has occurred during shipping. Notify your nearest Hanna Instruments Customer Service Center if damage is observed. Each HI99121 is delivered in a rugged carrying case and is supplied with: •... -
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: Specifications
SPECIFICATIONS ‑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: Operational Guide
OPERATIONAL GUIDE 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“). CONNECTING THE ELECTRODE With the meter turned off, connect the HI12923 probe to the DIN socket on the bottom of the meter by aligning the pins and pushing in the plug firmly. - Page 8 FREEZING MEASUREMENT VALUES While in measurement mode, press and hold the SET button until “HOLD“ appears on the secondary 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, displaying “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...
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Page 11: Meter Setup
METER SETUP Setup mode allows the selection of the Temperature unit, Auto‑off, Beep confirmation tone, 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. -
Page 12: Soil Ph
SOIL pH 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. Figure 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 affect 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 Procedure for the measurement of soil solution 1) Ensure meter is set up corectly and pH electrode is calibrated. 2) Sampling a) Extract soil sample for testing. For small sample area at least 2 samples are recommended. For larger areas take 1 sample per 1000 m (0.25 acre).
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Page 16: Organic Substrate
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 bought substrate is that desired (pH can change if too much time elapses from the date of packaging to the moment of utilization). 1) Ensure pH meter is set up correctly and pH electrode is calibrated. -
Page 17: Nutrient Solution
NUTRIENT SOLUTION A rational fertilization program is required for optimum plant growth in greenhouses. pH value of nutrient solution (water + fertilizer) has to meet plant needs. If a fertigation system with automatic pH control is used, ensure that it is functioning properly. Check the pH of the irrigation solution as well as of 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
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“ for a few seconds then the meter powers off. -
Page 20: Accessories
ACCESSORIES Combination preamplified pH/temperature probe with conical tip, DIN HI12923 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 pH 10.01 buffer solution, 500 mL HI70300L... -
Page 21: Electrode Maintenance
ELECTRODE MAINTENANCE PREPARATION • Remove the protective cap. Do not be alarmed if any salt deposits are present. Rinse with water. • Shake the electrode down as you would do with a clinical thermometer to eliminate any air bubbles inside the glass tip. •... -
Page 22: Certification
CERTIFICATION 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. -
Page 23: Recommendations 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 MAN99121N Printed in ROMANIA...