LaMotte Tracer DO PockeTester, 1761 User Manual
Tracer DO PockeTesterTM
Code 1761
FILL - Before first use
POLARIZE - Weekly
CALIBRATE - Daily
See Pages 9-12
Water Testing Leader Since 1919!
WARNING! This set contains chemicals
that may be harmful if misued. Read
cautions on individual containers
carefully. Not to be used by children
except under adult supervision.
TRACER
DISSOLVED OXYGEN • CODE 1761
Introduction .....................................................................................4
Specifi cations ..................................................................................4
Contents ..........................................................................................4
Parts & Accessories ........................................................................5
Meter Description
Front Panel Description ............................................................... 5
Display .......................................................................................... 5
Operation
Filling the Electrode ..................................................................... 6
Powering the TRACER ................................................................. 6
Startup Polarization Period .......................................................... 6
Turn-on Diagnostics .................................................................... 6
Changing the Temperature Units ................................................ 6
Changing Salinity Compensation................................................ 7
Changing the Altitude Compensation ......................................... 7
Changing Measurement Units ..................................................... 7
Auto-Power Off Feature ............................................................... 8
Disabling Auto-Power Off Feature ............................................... 8
Low Battery Indicator ................................................................... 8
Storing Readings ......................................................................... 8
Recalling Stored Readings .......................................................... 8
Clearing Stored Readings ........................................................... 8
Set Up
Membrane Cap Assembly - Filling and Replacement ................ 9
Polarization ................................................................................. 10
Calibration ................................................................................... 10
Optional Zero Oxygen Calibration.............................................. 11
Dissolved Oxygen Measurement ...................................................12
Operational Matrix ..........................................................................13
Troubleshooting .............................................................................16
Maintenance
Battery Replacement ..................................................................17
Battery Safety .............................................................................. 17
Electrode Replacement ............................................................. 17
Replacing the Membrane Cap .................................................... 17
Electrode Storage ....................................................................... 18
Warranty ...................................................................................... 18
Short Form Instructions (back cover)
INTRODUCTION
Congratulations on your purchase of the Dissolved Oxygen/Temperature TRACER.
Units of measure are % saturation, mg/L or ppm for dissolved oxygen
for temperature. Advanced features include data hold, 25 point memory,
automatic temperature compensation, and salinity/altitude compensation.
Careful use and maintenance will provide years of reliable service.
and C° or F°
auto shut off,
SPECIFICATIONS
Display 2000 count, Dual function 3 ½ digit LCD
Display size 24 mm x 20 mm
Sensor Polarographic type
Membrane Bonded membrane cap with threaded f tting
Operating Temp. Range 0 to 50°C (32 to 122°F)
ATC Range 0 to 50°C (32 to 122°F)
Salinity Compensation 0 to 50 ppt in 1 ppt (part per thousand) increments
Altitude compensation 6000 m (0 to 20,000 ft) in 300m (1000 ft) increments
Measurement Storage 25 tagged (numbered) data sets with recall
Battery Power Four (4) CR2032 button batteries
Low Battery Indication ‘BAT’ appears on the LCD
Auto Power Off
Dimensions/Weight 36 x 173 x 41mm (1.4 x 6.8 x 1.6”); 110g (3.8 oz)
Measurement Range Resolution Accuracy
% Saturation 0 to 200.0% 0.1% ±2.0% FS (full scale)
Dissolved Oxygen 0 to 20.00 mg/l 0.01 mg/l ±2% FS
Concentration 0 to 20.00 ppm 0.01 ppm ±2% FS
Temperature 0 to 50 °C 0.1 °C ±1.0 °C
with Bar graph
After 10 minutes of inactivity (APO override available)
32 to 122°F 0.1 °F (0 to 99ºF);
1.0 °F (>100°F)
±1.8°F
CONTENTS
Dissolved Oxygen TRACER Kit Code 1761
Includes:
DO TRACER Body
DO Bonded Membrane Cap Assembly
Electrolyte Solution Code DO600-EL
Sample cup and Lanyard
4
PARTS & ACCESSORIES
DO Replacement Sensor Kit (sensor module,
membrane cap assembly, electrolyte solution)
DO Membrane Cap Kit (6 membrane cap assemblies,
electrolyte solution, Polishing Strips)
DO Extension Cable, 1 meter (with probe guard and weight)
DO Extension Cable, 1 meter (with probe guard and weight)
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)
Code 1762
Code 1761M
Code 1763
Code 1764
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)
5
10
7
t
2
mg/L
10
20
12
%
5
6
5
*
OPERATION
Filling the Electrode
The electrode is shipped dry and requires f lling with the supplied electrolyte
solution before the f rst use. The membrane should be in place and does not need
to be replaced. Follow the procedure on page 9 for f lling 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 f rst 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 will keep the electrode
polarized and enables the user to make immediate measurements within a 7 day
period without waiting for the electrode to re-polarize. Each time the Tracer is
turned on, the polarization timer is reset and the 7 day polarization period is
initiated. A small asterisk at the bottom right corner of the display will indicate
that the polarization timer circuit is active only when the meter is off. If the
Tracer is not used for more than seven days, a 3 minute waiting period is required
before a measurement can be made.
Turn-On Diagnostics
1. When the meter is turned on ‘SELF’ and ‘CAL’ will be displayed while
the meter runs a diagnostic routine.
2. During this time the meter is recalling the User Calibration data, performing
self diagnostics & initializing the circuitry.
3. After this function is complete, the meter proceeds to the normal
measurement mode.
Changing the T
emperature Units
To change the displayed temperature units between °F and °C
1. With the unit OFF, press and hold CAL.
2. With CAL depressed, momentarily press
ON/OFF
to turn the Tracer ON.
3. Release CAL. ‘SELF CAL’ will be displayed.
4. Repeat Steps 1 – 3 to change to the other temperature unit.
6
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