1.1These test methods cover the determination of the electrical conductivity and resistivity of water. The following test methods are included:

	Range	Sections
Test Method A-Field and Routine Laboratory	10 to 200 000	12 to 18
Measurement of Static (Non-Flowing) Samples	μS/cm
Test Method B-Continuous In-Line Measure	5 to 200 000	19 to 23
ment	μS/cm

1.2These test methods have been tested in reagent water. It is the user's responsibility to ensure the validity of these test methods for waters of untested matrices.

1.3For measurements below the range of these test methods, refer to Test Method D5391.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.