Cardy Potassium K+ Meter User`s Manual
Contents
1. or tissue etc Rinse with deionized water then wipe dry with a piece of sampling sheet or tissue etc Repeat rinsing and blot dry 3 Place a piece of sampling sheet onto the sensor pad and drip 2 to 5 drops of the standard STD solution on it or drip the solution directly onto the sensor pad 4 After the readout has stabilized adjust the STD dial so that the display reads 20 X 100 5 After cleaning the sensor according to step 2 apply the standard 15 X 10 SLOPE solution as in step 3 After the readout has stabilized pull the rubber plug and use the driver end of the tweezers to adjust the SLOPE until the display reads 15 X 10 6 After cleaning several times with distilled water measure the standard STD solution again Recalibrate if the reading is not 20 2 X 100 MEASUREMENT OF TISSUE SAP Sample Collection When conducting a test on plant materials the biggest source of error is due to sampling This error results when a sample is not representative of the source Follow these steps to gather and care for your sample 1 Do not sample plants which show obvious signs of nutrient deficiency or damage from disease insects or chemicals unless these plants are the subject of a study Plants which have been under stress for a period of time may not give a true picture of the nutrient status of the field 2 The leaves or parts of leaves selected should be of the same age and relative position on2. A A Mm C gt c Zz gt Z Cardy Potassium K Meter Catalog 2400 Spectrum Technologies Inc CONTENTS Specificati h Suc 2 General Overview uiceeeeeeerrrerrrenrens 2 Meter Components and Accessories 3 Meter Component Functions 3 Care for Your Cardy Meter 4 Calibration arca 5 Measurement of Tissue Sap 5 Measurement Procedure 5 Soil Test Instructions eeeeeeeeeeeea 6 Maintenance and Service 6 Petiole Sufficiency Levels 8 A tic saetenideaseeseesaccce ce 9 Service and Support 9 Product Return usadas 9 This manual will familiarize you with the features and operation of your Cardy Potassium Meter Please read this manual thoroughly before using your meter For customer support or to place an order call Spectrum Technologies Inc at 815 436 4440 between 7 30 am and 5 30 PM CST or FAX at 815 436 4460 E Mail soecmeters aol com Website www specmeters com Spectrum Technologies Inc at 23839 W Andrew Rd Plainfield IL 60544 SPECIFICATIONS Display LCD two digit display Display Range O 99 x 100 ppm 9 900 ppm 0 Battery 2 CR 2025 lithium user replaceable Battery Life Approximately 500 Hrs continuous use Resolution e ppm for 0 99 ppm e 10ppm for 10 99 x 10 ppm e 100ppm for 10 99 x 100 ppm Calibration 2 point calibrati
3. ance with the stipulations laid down herein The term of this warranty shall be for three months from date of purchase This warranty excludes batteries sensor and accessories Warranty Stipulations 1 The product shall be repaired or replaced free of charge should any trouble occur during the course of normal use if returned within the warranty period three months from date of purchase In which event contact the dealer of purchase Return CARDY with proof of date of purchase 2 Expenses shall be incurred in the following instances within the warranty period Costs such as postage shall be borne by the customer a When the date of purchase and store name is not written on the warranty b When trouble or damage has been incurred due to misuse abuse and or improper handling c When the CARDY has been repaired modified and dismantled by persons other than a HORIBA designated agent or service shop d In the event of changes in external appearance such as scratches or dirt caused during use or battery fluid leakage e In the event of unsuitable movement dropping or accidents such as fire earthquake floods or burglary f When replacing consumables and accessories g When cause of trouble lies not in the CARDY itself h When this warranty is not shown and when necessary particulars have not been written in the warranty Our obligation under this warranty is to repair or replace the CARDY free of
4. charge in accordance with the conditions laid down herein Accordingly this warranty does not limit your specific legal rights The warranty card must be completed and mailed promptly in order to register your CARDY under our warranty SERVICE AND SUPPORT For technical service and support call your distributor or Spectrum Technologies Inc When calling for technical support have a detailed explanation of the problem that you are experiencing The more information you can provide the faster and easier a technical support person will be able to assist you For technical support call 815 436 4440 PRODUCT RETURN If for any reason you are not satisfied or the meter has failed and you need to return the product for service you will need to contact Spectrum Technologies Inc Before returning a failed unit you must obtain a Returned Goods Authorization RGA number from Spectrum You must ship the product s properly packaged against further damage back to Spectrum at your expense with the RGA number marked clearly on the outside of the package Spectrum is not responsible for any package that is returned without a valid RGA number or for the loss of the package by any shipping company Spectrum Technologies Inc 23839 W Andrew Rd Plainfield IL 60544 800 248 8873 or 815 436 4440 Fax 815 436 4460 E Mail SpecMeters aol com Website www specmeters com
5. eplacing To replace batteries turn the meter over and remove the circular battery cover Release the cover by placing a coin in the slot and turning it in the direction shown to open Place new batteries CR2025 with the positive terminal up and under the metal tab Replace the battery cover Replace both batteries at the same time Do not throw old batteries into a fire Do not leave old batteries in reach of children If a child does accidentally swallow a battery cell call a doctor immediately Sensor The field replaceable sensor has a life of approximately 200 400 measurements depending on the sensor age frequency of use and maintenance The sensor is worn out when a the sensor will not calibrate to the slope standard there is no more adjustment in the slope screw or b the meter drifts from its calibration standards when rechecking the two 2 point calibration Repeat the calibration and check for drift Samples likely to damage the sensor pad include organic solvents surface activators cement alcohol strong acid strong alkali etc The sensor pad is a thin soft film Do not handle in such a way that will scratch or damage the sensor If samples have a small amount of oil it may be necessary to clean the sensor with a mild detergent solution To replace the sensor turn the meter over and take the sensor off both hooks with the tweezers or a similar tool Attach the new sensor to the meter pro
6. ight SOIL TEST INSTRUCTIONS Soil testing of mineral soil requires the Soil Test Kit A starter kit is included with the Cardy K meter 2400 Additional supplies can be ordered through a distributor or by calling Spectrum Tech directly Measurement Procedure 1 Measure 1 level measuring spoon 11cc full of dry soil into the soil sample cup The soil should be pulverized and sifted through a flour sifter 2 Add 2 50cc measuring spoons of aluminum sulfate extractant to the soil 3 Mix the soil and the solution by stirring with the spoon for at least 2 minutes making sure the soil sample is thoroughly mixed with the distilled water Let stand for 5 minutes 4 Fold a circular filter in half twice and open it up to form a cone Place it in the soil suspension as far as possible The filtration will take place from the outside of the filter to the inside 5 As soon as sufficient filtrate accumulates in the filter use the small pipette to transfer the soil extract onto the sensor of the Cardy Meter 6 After the value has stabilized 30 45 sec read the value from the digital display Multiply the display value by 10 to correct for the dilution For Ibs acre multiply by 2 7 Rinse sensor and blot dry Display should read 0 with distilled water on it if not rinse again MAINTENANCE AND SERVICE Battery When the meter LCD display shows the battery symbol B batteries need r
7. ized water Sensor pad Tweezers Sampling sheet SLOPE volume METER COMPONENT FUNCTIONS 1 Power Switch Turns the power ON or OFF 2 STD dial calibrates the Cardy with Standard 3 SLOPE volume Calibrates the Cardy to the SLOPE calibration solution 4 LCD display Expressed as ppm K Displayed by one of three automatically switched ranges X1 0 99 ppm X10 100 990 ppm X 100 1000 9900 ppm 5 Sensor pad lon specific electrode principle replaceable 6 Sensor cover protects the sensor during storage 7 Battery box contains two CR 2025 lithium cells A B shows up in the display if the batteries are low 8 Tweezers Use for handling sample sheet Use the head of the tweezers for adjusting the SLOPE volume screw 9 Sampling sheet Use for measuring samples and calibrating meter Assures that the solution bridges across the sensor pad properly 10 Pipette Use for depositing solutions on the sensor for measurement 11 Standard Solutions Use for calibrating the meter 12 Yellow Seal Use to cover the sensor reference junction when meter is idle for more than 30 days 3 CARE FOR YOUR CARDY METER 1 If the sensor is new or has been inactive for over a month drip 3 to 4 drops of either one of the standardizing solutions onto the sensor pad using a sampling sheet to warm up the sensor for 20 to 30 minutes The meter can be off This improves sensor response time and reduce
8. on by STD SLOPE con trols using standard calibration solutions Weight 1 4 0z approximately 40 g Repeatability 20 of indication value Compensated Sample Temperature At ambient temperature GENERAL OVERVIEW Congratulations on the purchase of your Cardy Potassium meter This manual describes how to use your Cardy meter and how to keep it working accurately for many years Read it thoroughly in order to make effective use of your meter The Cardy Potassium meter presents a completely new concept in sample measurement This self contained digital meter delivers high quality answers to potassium level questions in soils plants and water based solutions The replaceable flat sensor makes the measurement of small samples much more convenient When replacement of the sensor is required the sensor cartridge snaps in and out of the meter at a touch The readout of the measurement value is an LCD display It a has a total display range of O 9900 PPM This is provided by three automatically switched ranges the X 1 range 0 99 ppm the X10 range 100 990 ppm and the X 100 range 1000 9900 ppm To get the final value you simply multiply the reading on the LCD display by the proper number 1 10 or 100 as indicated by the small arrow on the right side of the display window METER COMPONENTS AND ACCESSORIES Power Switch STO dial Standard STD solution LCD display Sensor Cover seal Deion
9. perly until it makes a Clear click sound Replacement sensors can be ordered from your distributor or Spectrum Technologies Inc Petiole Potassium Sufficiency Levels Source University of Florida Crop Growth Stage K ppm Tomato field First Buds 3500 4000 First Open Flowers 3500 4000 First 1 inch Diameter 3000 3500 First 2 inch Diameter 3000 3500 First Harvest 2500 3000 Second Harvest 2000 2500 Tomato Greenhouse Transplant to second fruit cluster 4500 5000 Second cluster to fifth fruit cluster 4000 5000 Harvest Season Dec June 3500 4000 Bell Pepper First Flower Buds 3200 3500 First Open Flowers 3000 3200 Fruits Half Growth 3000 3200 First Harvest 2400 3000 Second Harvest 2000 2400 Eggplant First Fruit 2 inches long 4500 5000 First Harvest 4000 4500 Mid Harvest 3500 4000 Potatoes Plants 8 inches Tall 4500 5000 First Open Flowers 4500 5000 50 of Flowers Open 4000 4500 100 of Flowers Open 3500 4000 Tops Falling Over 2500 3000 Annual Hill November 3000 3500 Strawberries December 3000 3500 January 2500 3000 February 2000 2500 March 1800 2000 April 1500 2000 Watermelon Vines 6 inches Long 4000 5000 Fruit 2 inches Long 4000 5000 Fruit One Half Mature 3500 4000 At First Harvest 3000 3500 WARRANTY This product has been brought to you having passed severe quality control and inspections Should any trouble occur during the course of normal use the CARDY shall be repaired or replaced free of charge in accord
10. s the drift of the readings 2 Astable meter reading occurs when the value on the LCD display has not changed for a period of three 3 seconds 3 Wait 30 to 45 seconds after the solution has been placed on the sensor pad when calibrating or making a reading A functional sensor should reach a stable reading during that time 4 When measuring a sample make sure that the sample is covering the two black round sensors in the sensor pad The ion concentration cannot be measured if the electrodes are not covered by the sample 5 Use clean tweezers to handle the sampling sheet 6 In order to obtain measurement values of high repeatability maintain identical conditions as much as possible 7 Any kind of soft wiping tissue may be used to blot the sensor pad dry after rinsing Sometimes there will appear to be some liquid on a spot of the small electrode It is normal simply rinse and blot dry Don t press the sensor pad with undue pressure Don t drop the CARDY or don t apply undue pressure Dont allow the CARDY to become wet Don t measure hot samples over 40 degrees Don t place the CARDY in direct sunlight or in hot or humid places Don t put the CARDY directly into the solution in a beaker etc CALIBRATION 2 Point Calibration Perform at least once a month 1 Turn the power ON 2 Open the sensor cover and wipe the sensor pad clean with a piece of sampling sheet
11. the plant The most recently matured leaves should be used These are the leaves that have stopped expanding in size The petiole or leaf stem of the leaf or appropriated plant material should be used for the test 3 A minimum of 25 petioles or leaves should be collected This is enough to represent a five to ten acre field if the field is judged to be uniform Chop up the petioles and mix and sub sample these pieces for testing Crops with small dry petioles such as strawberries require much larger samples to get enough sap compared to fleshy crops such as tomatoes Store whole petioles not leaves at room temperature for up to 112 hours or on ice for up to eight hours Cold petioles should be warmed to room temperature before taking a measurement MEASUREMENT PROCEDURE 1 Measurement can be aided by placing the sample onto a piece of sampling sheet Using the pipette included in the case transfer 3 to 5 drops of the pressed plant liquid onto the sensor pad A sampling paper may also be placed on the sensor and saturated with the liquid Note the plant sap press may be ordered from Spectrum Technologies Inc or your distributor 2 After the value has stabilized 30 to 45 seconds read the results from the display 3 Rinse the sensor pad with the distilled water and blot it dry with tissue or a paper towel Repeat rinse and blot dry Important Do not make measurements with the meter sensor in direct sunl
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