Manual

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pH/Conductivity Instrumentation

Accuracy • Reliability • Simplicity

AGRI-METERS

Operation Instructions

User Manual for Models AG-5

AG6/PH

2450 Impala Drive

Carlsbad, CA 92010-7226 USA

Tel 760-438-2021

Fax 800-869-7668 / 760-931-9189

www.myronl.com

Summary of content (6 pages)

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AGRI-METERS Operation Instructions User Manual for Models AG-5 AG6/PH 2450 Impala Drive Carlsbad, CA 92010-7226 USA Tel 760-438-2021 Fax 800-869-7668 / 760-931-9189 www.myronl.
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DESCRIPTION This manual describes your Myron L Agri-Meter, tells you how to use it, and how to keep it working accurately for many years. Myron L AG-5 and AG6/pH Agri-Meters are compact, light-weight, self-contained conductivity and conductivity/pH meters. They contain a built-in sample cell cup and, in the case of the AG6/pH, a replaceable pH sensor. Both Agri-Meters have dials cailibrated in millimhos. The AG6/pH dial is also calibrated in pH units.
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USING YOUR METER SOIL TESTING CONDUCTIVITY MEASUREMENT 1. Rinse the celI cup three times with the sample you want to test. (For very hot or very cold samples see TEMPERATURE COMPENSATION below.) NEVER FILL THE CELL BY DIPPING THE METER INTO WATER! 2. Fill the cell with another sample to at least 1/4" (6mm) above the upper electrode. 3. Press the black button. 4. Read the conductivity in millimhos indicated by the pointer on the dial's black scale. 5.
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CALIBRATION/FIELD CALIBRATION MAINTENANCE/ACCESSORIES CONDUCTIVITY STANDARD SOLUTIONS: A Standard Solution has a known conductivity value. Your meter was calibrated at the factory using Myron LCompany 442-3000 Standard Solution. You can keep your meter accurate by using the same Standard Solution. How often you calibrate your meter depends on how much you use it. For once a day use, recalibrate it every three months. CHECKING CONDUCTIVITY CALIBRATION 1. Test a sample of Myron L 442-3000 Standard Solution.
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FIELD CALIBRATION NOTE: The feature described below is on the AG-5 only. It is intended as a quick field calibration check, or for using the range doubling technique. It is not replacement for calibration with Standard Solution. INTERNAL STANDARD: Your AG-5 has an INTERNAL STANDARD value on the bottom cover of each meter. Use it between normal calibrations as a field check of your meter's accuracy. To verify your meter's calibration: 1. Press the red button. 2.
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ACCESSORIES CONDUCTIVITY STANDARD SOLUTIONS YourAgri-Meter has been factory calibrated with a Standard Solution of 3.9 millimhos (3900 micromhos) conductivity. You can keep your meter accurate by using this same Standard Solution. All Myron L Company Conductivity Standard Solutions are within 1.0% of Potassium Chloride reference solutions. The concentrations of the reference solutions are calculated from data in the International Critical Tables, Vol. 6.