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_ W n _ <br /> r u. 3 ,w = <br /> yr KEE <br /> . <br /> CONDUCTIVITY (continued) <br /> APPENDIX La <br /> Paige 2 of 2 <br /> Notes <br /> A. When operating in the 2 umhoslcm range,the instrument should be operated on battery power to prevent <br /> outside AC power interference.Depending on the nature of the vessel in which measurements are taken, <br /> battery operation may be advisable in other ranges and in the temperature mode also to eliminate possible <br /> effects of ground loops. <br /> B. Additional conductivity meter stales have been included as part of the eondMdVity option to provide <br /> equivalent readings in ohms-cm,mg/L sodium chloride and gr/galsodium chloride.Keep in mind that the <br /> sodium chloride calibrations we based on pure NaCl solutions.headings taken from these scales <br /> should <br /> be considered as mpmsenting only the concentration of sodium chloride which is the conductivity equiva- <br /> lent to the conductivity of the sample solution and does not necessarily represent the acts:al concentration <br /> of sodium chloride in the sample. <br /> C. Water sample containing oils,,reases or fats will coat the elccuodes and arfett the accuracy of the read. <br /> r ings.Should this occur,the probe should be cleaned with a strong detergent solution or dipped in a one-to- <br /> s' one mixture of hydrochloric Acid and demineralised water and then thoroughly rinse,l with de- <br /> mineralized water. <br /> 9 <br /> r� <br /> MT, <br /> gg w - <br /> i <br /> i <br />