3
METER DESCRIPTION
Front Panel Description
1. Battery compartment cover
2. LCD Display
3. MODE button
4. CAL button
5. ON/OFF button
6. Electrode Retaining Collar
7. Dissolved Oxygen Sensor
8. Bonded membrane cap assembly
9. Membrane & cathode (Note: The Electrode storage cap is
not shown)
Display
1. Bar graph display
2. Measurement units
3. Main display
4. Low Battery indicator
5. Temperature display
6. Reading Hold indicator
7. Polarization indicator (meter off)
OPERATION
Filling the Electrode
The electrode is shipped dry and requires filling with the supplied
electrolyte solution before the first use. The membrane should be in place and
does not need to be replaced. Follow the procedure on page 6 for filling the
membrane cap.
Powering the Tracer
The Tracer uses four (4) CR2032 Lithium Ion Batteries. Press the
ON/OFF
button to turn the meter on or off. If the batteries are weak, the ‘BAT’ indicator
will appear on the display. The auto power off feature shuts the Tracer off
automatically after approximately 10 minutes of inactivity. The auto power
off feature may be temporarily disabled for convenience or for extended
polarization time.
Startup Polarization Period
When the DO Tracer is powered up for the first time, the electrode requires
polarization. In order for this to occur a polarization period of approximately
three minutes must elapse before measurements can be made. After the
meter has been turned on, a special circuit in the meter will maintain a
very small biasing current to the electrode for a period of seven days. This
2
t
5
10
7
10
20
12
mg/L
*
5
6
%
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