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3. Press CAL once (quickly).
4. Immediately and simultaneously press the MODE and ON/OFF buttons for
approximately 2 seconds, until "oFF" is briefly displayed.
To disengage this feature, turn the unit off with the ON/OFF button. The next time
the unit is powered up, Auto Power OFF mode will be engaged again.
Low Battery Indicator
The "BAT" indicator will be displayed when the batteries become weak. Refer to the
Maintenance section for battery replacement information.
Measurement and Display Considerations
¬ If the unit appears to be locked (display frozen). It is possible that the Data
Hold mode has been inadvertently accessed by pressing the MODE button.
("HOLD" will be displayed in the bottom left of the display.) Press the MODE
button again or turn the meter off and then on.
¬ For maximum accuracy, allow sufficient time for the temperature of the
probe to reach the temperature of the sample before calibrating. This will be
indicated by a stable temperature reading on the display.
Considerations and Technique
¬ Do not touch the inner surfaces of the conductivity electrodes. Touching the
surface of the platinized electodes may damage and reduce the life of the
probe.
¬ Store the electrode in the wetting cap with the sponge moistened with pH 4.0
buffer solution.
¬ Always rinse the electrode in deionized or distilled water between
measurements to avoid cross contamination of the sample. Double rinsing is
recommended when high accuracy is required.
¬ Periodically, accumulated salt deposits from the reference electrode may
build up in the storage cap, and should be rinsed away. These deposits could
affect measured values of low conductivity samples.
¬ When measuring low conductivity samples, extra care is recommended
in rinsing the probe to avoid contamination of the sample with electrolyte
from the pH reference electrode. This will only be a factor when
the volume of the sample. (Example: Try a 200 to 500 mL sample.)
¬ When a 20mL sample cup is usedthe electrode should not be allowed to sit in
the sample for any longer than necessary, to avoid electrolyte leakage into the
sample, raising the conductivity value.
TESTING
Getting Started
¬ Remove the cap from the bottom of the Tracer to expose the pH electrode,
reference junction and conductivity electrodes.
¬ Before the first use or after storage, soak the electrode in tap water or pH 4
buffer solution for about 10 minutes.
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