Measurement Procedure
Contents
1. C CT Onguard Ag 90880009000 90880015000 SMC AB 90880016000 30 ppm Y044 300 ppm Y042 90880013000 90880011000 1 MEAS 52. 1 1 ON OFF PEWEANS CAL HORIBA eae D ann me Y g PUSH 300 ppm 4 1 Cr CYUMICEE SMA ABERLS 60 mL 70 mL 4 5 MEAS NA PUSH HORIBA MEAS S Fin Nop O O a ILI ppmNOs CAL 4 5 259 6 1 5 1 5
3. kg 10a LCD foom NN CAL 3 J a MEAS 1 0 5 1 1 CAL It m MEAS 2 30 ppm 3 CAL 2 4 1 1 5 300 ppm 1 2
4. ion mode from the special setting modes Perform two calibrations when you want higher precision measurement 1 Follow the steps below to set the two calibration mode Press and hold the MEAS switch for at least 5 seconds to enter the special setting modes All the LCD segments light then the display on the right appears kg 10a 9 mVg L ppmNo3 N Press and hold the CAL switch until the icon and the number 3 appear Press the MEAS switch once 0 5 second to display the number of calibrations currently set When one calibration is set the number 1 appears I Press the CAL switch to display the number 2 Press the MEAS switch The two calibration mode is now set and the meter returns to the standard measurement mode 2 Add some drops of the 30 ppm standard solution to the sensor and close the light shield cover 3 Press the CAL switch for at least 2 seconds The icon flashes 4 When the icon changes from flashing to steadily lit the first calibration has been finalized The first calibration must be finalized before you can perform the second calibration 5 Add some drops of the 300 ppm standard solution to the sensor and perform the second calibration by the same procedure used for the first twinno B 342 CODE GZ00000961 11 October 2007 2007 HORIBA Ltd 1 PE 3
5. out 1 5 Measurement results are affected by the actual soil moisture concentration To eliminate the effect of the soil s moisture concentration allow the soil to air dry mix it with water in a ratio of 1 part soil to 5 parts water and sample the water from the top after the mixture has settled Accurate measurements can t be obtained from measuring fluid soil suspensions turbid samples Use the dedicated filter paper to perform measurement You don t need the dedicated filter paper when you have created your own method of removing suspended particles using equipment such as a centrifugal separator or general purpose filter paper The sensor is affected by light so avoid direct sunlight Measurement may be impeded in soil with significantly high electrical conductivity chloride ion C concentration or oil concentration Using the Onguard Ag chloride ion removal precolumn sold by Dionex is an effective way to remove chloride ions CI Consumable parts supplies Name Part No Replacement sensor 90880009000 Dedicated filter papers 90880015000 Filter paper holder cover 90880016000 30 ppm dedicated standard solution Y044 90880013000 300 ppm dedicated standard solution Y042 90880011000 Rinse off the sensor with water CD Note Read the Instruction Manual in addition to this procedure e Procedure for Two Calibrations For More Accurate Measurement Select the two calibrat
6. twinno Model B 342 Measurement Procedure 010 5 EFA 0 00 kk October 2007 2007 HORIBA Ltd 1 When using the meter for the first time change the sensor co 2 Turn the power ON x h 3 Calibrate the sensor to ensure correct measurement Replace the existing sensor cover with Press the ON OFF switch the filter paper holder cover provided 4 Take the measurement Always calibrate the sensor at least once per day MEAS Add the standard Press the CAL switch iO AD Eg 300 ppm standard solution Insert a filter paper Add the soil sample to water Se Add enough of the sample to 60 mL of water to bring the total volume to 70 mL Place the filter paper in the sensor unit and close the filter paper holder cover Shake the soil water mixture for 1 minute Sample the clear fluid on top S Sample the fluid after allowing the mixture to settle for several minutes 5 Always rinse the sensor after use 9 Press the MEAS switch Press Drop the sampled fluid onto paper HORIBA MEAS MEAS 5 HO CAL i 3171 LI ppmnoz Wait until the stability icon lights before Guideline 4 or 5 drops 4 pressing the switch e Soil Measurement Supplementary Information The measurement procedure printed is just an example Soil with a moisture content of 25 has a soil to water ratio of ab
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