LaMotte POCKETESTER EC/TDS/SAL TRACER, Manual, Page: 10 / 16

Measurement
1.
Fill a sample cup to the 20 mL line with the test
sample. Sample depth must be greater than or
equal to 1.5 inches.
2. Immerse the TRACER electrode in the sample.
Make sure the electrode is completely submersed.
3. Press the ON/OFF button. (8888 and then
SELF CAL will appear in the display during the
initial diagnostics).
4. Slowly stir the sample with the TRACER to
remove air bubbles.
5. The meter will autorange to the proper range
and the reading will be displayed. The display
will flash “0000” while autoranging.
6. Rinse the electrode in distilled water. Replace
the cap.
Measuring the TDS of Soil
1.
Fill a 50 mL beaker with the soil sample. Tap the beaker lightly on a
hard surface to remove trapped air. Remove excess soil from the
surface.
2. Empty the soil into a 250 mL wide-mouth flask.
3. Add 100 mL of distilled water. Stopper and shake vigorously.
4. Wait 30 minute. (Shake the flask vigorously three or four times
during this period.)
5. Filter the contents of the flask. Collect the filtrate in a beaker.
6.
Rinse the electrode with distilled or deionized water to remove
impurities.
7. Press the ON/OFF button to turn the TRACER on. Make sure the
meter is in the TDS mode.
8. Immerse the electrode in the filtrate. Make sure the tip of the
electrode is completely immersed.
10
t