7
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 f ash 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, brief y
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 f ashing, 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 f fteen readings are stored, the sixteenth stored reading will over-write
the f rst stored reading.
