LaMotte Tracer ORP Meter User Manual

DISSOLVED OXYGEN

TRACER

POCKETESTER

See Short form Instruction on the back cover. Read the entire manual before use.

CODE 1761

WARNING! This set contains chemicals

that may be harmful if misused. Read

cautions on individual containers

carefully. Not to be used by children

except under adult supervision

TRACER

DISSOLVED OXYGEN • CODE 1761

Table of Contents

Introduction ................................ 4

Specifications ............................... 4

Contents ..................................

Parts & Accessories ............................ 5

Meter Description ............................. 6

Front Panel Description.......................... 6

TRACER Display ............................. 6

SetUp................................... 7

Polarization ................................ 7

Calibration ................................ 7

Measuring Dissolved Oxygen ....................... 8

Basic Operation .............................. 8

Powering the TRACER.......................... 9

Changing the Temperature Units .................... 9

Changing Salinity Compensation .................... 9

Changing the Altitude Compensation .................. 9

Changing Measurement Units ...................... 9

Data Hold ................................ 10

Low Battery Indicator .......................... 10

Storing Readings ............................ 10

Recalling Stored Readings........................ 10

Clearing Stored Memory ........................ 11

Disable Auto Power Off ......................... 11

Calibration ................................ 11

Calibration................................ 12

Zero Oxygen Calibration....................... 13-14

Operational Matrix ............................ 15

Maintenance ............................... 15

Battery Replacement .......................... 15

Replacing the Electrode ......................... 15

Storage.................................. 15

Electrode Cleaning Recommendations ................. 16

Membrane Cap Assembly Replacement ............... 16-17

Troubleshooting ............................. 18

Warranty ................................. 19

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 and °C or °F for temperature. Advanced features include data hold, 25 point memory, auto shut off, automatic temperature compensation, and salinity/altitude compensation. Careful use and maintenance will provide years of reliable service.

SPECIFICATIONS

Display Dual function 3 ½ digit LCD with Bar Graph

Display size: 24 mm x 20 mm

Range % Sat: 0 to 200.0%

DO: 0 to 20.00 mg/L, 0 to 20.00 ppm Temp: 0 to 50°C, 32 to 122°F

Resolution: % Sat: 0.1%

DO: 0.01 mg/L, 0.01 ppm Temp: 0.1°C, 0.1°F (0 to 99°F),

1.0 °F (>100 °F)

Accuracy: % Sat: ±2.0% full scale

DO: ±2% full scale Temp: ±1.0°C, ±1.8°F

Operating Temperature

0 to 50°C (32 to 122°F)

Range

Automatic Temperature

0 to 50°C (32 to 122°F)

Compensation

Salinity Compensation 0 to 50 ppt in 1 ppt increments

Altitude Compensation 0 to 20,000 ft in 1000 ft increments

Sensor Polarographic type

Membrane Bonded membrane cap with threaded fitting

Data Storage 25 tagged (numbered) data sets with recall

Auto Power Off After 10 minutes of no button presses

(override available)

Battery Power Four 303/357 button batteries

Low Battery Indicator ‘BAT’ appears on LCD

Dimensions 1.4 X 6.8 X 1.6 inches (36 X 173 X 41 mm)

CONTENTS

Dissolved Oxygen TRACER Kit Code 1761

Includes:

DO TRACER Body

DO Bonded Membrane Cap Assemblies (2)

Electrolyte Solution Code D0600-EL

Sample cup

Lanyard

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, 5 meters (with probe guard and weight)

Code1762

Code 1761M

Code 1763

Code 1764

METER DESCRIPTION

Front Panel Description

Battery compartment cap

2. LCD display

3. MODE/HOLD button – change

mode, hold data, store data

4. CAL/RECALL button –

calibration, change temperature units, recall data

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.)

Bottom View of Electrode

Cathode

TRACER Display

Bar graph reading

2. Measurement units

3. Main display

4. Battery indicator

5. Temperature display

6. Reading hold indicator

Membrane

SET UP

Polarization

It will take 2-3 minutes for the probe to polarize. When the meter is first turned on very high oxygen readings will be displayed. However, these readings will drop to a steady state as oxygen that was absorbed in the electrolyte solution, while the meter was turned off, is reduced. Once this steady state is reached, polarization is complete. The meter may have to be calibrated after polarization.

1. The meter must be in the % saturation mode. If the meter is not in the

% saturation mode, press and hold the MODE/HOLD button to change to the next unit of measure in the sequence:

% saturation

dissolved oxygen, mg/L

dissolved oxygen, ppm

Release the MODE/HOLD button when % saturation is displayed.

2. Observe the % saturation reading on the display. The electrode will be

polarized when the reading has stopped drifting and is steady. If the % saturation value that is displayed is 101.7%, proceed to Testing/Measurement.

3. If the displayed % saturation is not 101.7% the meter must be

calibrated.

NOTE: The auto-power off feature will automatically shut the meter off 10 minutes after the last button was pressed. If the initial polarization of the electrode takes longer than 10 minutes, the auto-power off feature must be disabled. See page 11.

Calibration

Calibration should be performed daily. The electrode membrane must be clean and dry or the calibration will be incorrect. This is a water saturated air calibration.

1. Press the ON/OFF button to turn the meter on.

2. The meter must be in the % saturation mode. If the meter is not in the

% saturation mode, press and hold the MODE/HOLD button to change to the next unit of measure in the sequence:

% saturation

dissolved oxygen, mg/L

dissolved oxygen, ppm

Release the MODE/HOLD button when % saturation is displayed.

3. Observe the % saturation reading on the display. Wait until the reading

is stable.

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