LaMotte TRACER POCKETESTER TDS - Manual (Page 10)

10
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 diagnos-
tics).
4. Press and hold the MODE/HOLD button to scroll to
the desired measurement mode.
5. Slowly stir the sample with the TRACER to remove
air bubbles.
6. The meter will autorange to the proper range and the
reading will be displayed.
7. 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 fl ask.
3. Add 100 mL of distilled water.
Stopper and shake vigorously.
4. Wait 30 minute. (Shake the fl ask
vigorously three or four times
during this period.)
5. Filter the contents of the fl ask.
Collect the fi ltrate in a beaker.
6. Rinse the electrode with distilled
or deionized water to remove
impurities.
SAL/EC/TDS
ON
OFF
MODE
CAL
100.9
72.3
∞F
4.01