LaMotte Tracer Total Chlorine Meter - Manual (Page 8)

TESTING
Conditioning the Electrode
The TRACER electrode comes in a factory cleaned condition. If the
meter is new or has been in storage for an extended period of time, at
least two tests should be performed to condition the electrode. The
electrode will perform best when in continuous use. Gently wipe the
electrode surface with a paper towel between uses.
Measurement
1. Fill a sample cup with exactly 20 ml of the sample water.
NOTE: Turbidity of the solution has no effect on the reading.
2. Add one TRACER TCL Tablet (7044A).
3. Use the tablet crusher (0175) to crush the tablet.
4. Cap and shake vigorously for 20-30 seconds. The tablet should be
completely disintegrated.
5. Turn the TRACER on. Wait 3 seconds for self-calibration.
Immediately immerse in the sample.
6. Stir the sample with the TRACER for 10 seconds. Stop stirring. The
sample and the electrode must remain still and stable during the
entire measurement.
7. The display will flash while readings are changing rapidly. The result
should be read when the display stabilizes. The reading will be held and
the HOLD annunciator will come on after 120 seconds.
8. Remove the TRACER from the sample. Turn the unit off. Replace
electrode cap.
NOTE: If a series of subsequent measurements is to be carried out,
briefly rinse the electrode with water (deionized, if available) and
shake off. Gently wipe the electrode surface with a paper towel
between uses.
9. The TRACER must be turned off and on again between samples.
Storing Readings
1. When the display is steady and not flashing, press the MODE/HOLD
button to store the data. The storage location number, the stored
reading and HOLD will be displayed. Press MODE/HOLD to return
to the current reading.
2. Only one reading can be stored during the 120 second measurement
cycle.
3. After fifteen readings are stored, the sixteenth stored reading will
over-write the first stored reading.
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