NOTE 1—The Emcee Model 1153 and D-2 Inc. Model JF-1A-HH measures and stores the sample temperature during the test cycle. Model JF-1A-ST measures and displays sample temperature at the completion of the test cycle.
NOTE 3—The Emcee Model 1153 automatically measures and records the reading at 3 s. The D-2 Model JF-1A-HH Samples 10 times upon activation, allow the center bar indicator on the display to come to center which indicates the current reading has repeated, once repeated press the sample button again to display the conductivity, temperature data and store the data to the instruments memory. The JF-1A-ST powers and indicates ‘Ready’ when ready to sample, once probe is immersed into a sample the user presses the sample button a second time to activate sampling, 10 measures are made indicated by a completion bar, once complete the result is average from data collected, the average result is displayed alternatively with sample temperature.
NOTE 5—With the Emcee Model 1152 Digital Meter and the MLA 900 Meter, measurements exceeding the range of the meter are indicated by a single digit “1” in the left side of the display where 1000s are shown. The D-2 Model JF-1A & JF-1A-ST reports to the display the text, “Value is Over Reading Out of Range.” A qualitative conductivity estimate (for which precision has not been established) can be made by inserting the probe in the sample to the first set of holes closest to the tip, which are at the mid point of the sensing portion of the probe. Since the displayed conductivity is inversely proportional to the depth of immersion, the value displayed, if any, should be doubled. Conductivities less than 1 pS/m up to 20 000 pS/m can be determined using Test Method D4308. When using the Emcee Model 1153 Digital Meter, measurements exceeding the range of the meter “OVER” will be displayed.
13. Precision and Bias 6
13.1 As the precision was determined from results obtained at a single location, the reproducibility value may not be comparable when results obtained at different times and locations are compared, due to changes in the property of interest: sampling, shipping, storage, environmental conditions and other factors. The precision of this test method as determined by statistical analysis of test results obtained by operator–instrument pairs at a common test site is as follows. The precision data