LaMotte 1766 User manual

Tracer pH/TDS/Salt

TM

PockeTester

Code 1766

Do Not allow pH sensor to dry out.

¬ Store Upright

¬ Before fi rst use, tap meter against

palm to move electrolyte to tip.

See pages 10 and 19.

pH/Conductivity/TDS/Salinity Meter!

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TRACER

pH/TDS/SALT POCKETESTER

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

Specifications ................................................................................5

Contents .........................................................................................6

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

Meter Description

Front Panel Description .................................................................. 7

TRACER Display ............................................................................. 7

Basic Operation

Powering the TRACER .................................................................... 8

Electrode Recognition .................................................................... 8

Automatic Calibration ..................................................................... 8

TDS Conversion Ratio .................................................................... 8

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

Data Hold ........................................................................................ 9

Auto-Power Off ............................................................................... 9

Low Battery Indicator ..................................................................... 9

Measurement and Display............................................................. 10

Technique ....................................................................................... 10

Testing

Getting Started ............................................................................... 11

Changing the Measurement Function .......................................... 11

Measurement ................................................................................. 12

Measuring the TDS of Soil ............................................................ 13

Storing Readings ........................................................................... 14

Recalling Stored Readings ............................................................ 14

Clearing the Memory ..................................................................... 14

Calibration

pH ................................................................................................... 15

Conductivity ................................................................................... 16

Operational Matrix ............................................................................. 18

Maintenance

Storage ........................................................................................... 20

Battery Replacement ..................................................................... 20

Electrode Care ............................................................................... 20

Replacing the Electrode ................................................................ 21

Electrode Cleaning Recommendations ........................................ 21

Troubleshooting ................................................................................ 22

Warranty .............................................................................................23

TM

CODE 1766

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INTRODUCTION

Congratulations on your purchase of the pH/TDS/SALT (pH/
conductivity/TDS/Salinity) TRACER PockeTester. The TRACER is
a revolutionary, fi rst of its kind measurement device that offers direct
reading of pH, conductivity, TDS and salinity with one electrode. Careful
use and maintenance will provide years of reliable service.

4 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction

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SPECIFICATIONS

Display 2000 count LCD with Bar Graph

pH Range 0.00 to 14.00

pH Accuracy ± 0.01 pH typical

pH ATC Range 32 to 194 °F (0 to 90 °C)

pH Measurement Storage 25 tagged (numbered) readings

pH Reference Junction

Conductivity Range 0 to 199.9 μS/cm

TDS Range 0 to 99.9 ppm and mg/L

Salinity Range 0 to 99.9 ppm S

TDS Ratio 0.4 to 1.0, adjustable

Salinity Ratio 0.5 fi xed

Conductivity ATC 2.0% per °C

Conductivity ATC Range 32.0 to 140.0 °F (0.0 to 60.0 °C)

Temperature Range 23.0°F to 194°F (–5.0°C to 90.0°C)

Temperature Resolution 0.1 up to 99.9, 1 >100

Temperature Accuracy ±1.8°F; 1°C; (from 23 to 122°F; -5 to 50°C)

Conductivity ATC Range 32.0°F to 140°F (0.0°C to 60.0°C)

Accuracy Conductivity: ±2% FS

Measurement Storage 25 numbered readings

Low Battery Indication ‘BAT’ appears on the LCD

Power Four CR2032 Lithium Ion batteries

Auto Power Off After 10 minutes of no button presses

Operating Conditions 23 to 122 °F (–5 to 50 °C)

Permanent gel, non-refi llable

200 to 1999 μS/cm

2.00 to 19.99 μS/cm

100 to 999 ppm and mg/L

1.00 to 9.99 ppt and g/L
(variable ratio)

100 to 999 ppm S

1.00 to 9.99 ppt S
(fi xed ratio of 0.5)

±5.4°F; 3°C; (from 122 to 194°F; 50 to 90°C)

TDS: ±2% FS
Salinity: ±2% FS

(override available)

NOTE: 1 part per thousand (ppt) equals 1000 parts per million (ppm).
Example: 3.1ppt=3,100 ppm

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CONTENTS

pH/CON TRACER PockeTester Kit Code 1766
Includes:
Sample Cup w/cap *
Tablet Crusher Code 0175
Buffer Tablets, pH 4.0, 7.0 & 10.0 *
*Not sold in this quantity. See below.

PARTS & ACCESSORIES

pH/TDS/SALT Replacement Electrode Code 1755
Weighted Stand w/Sample Cups (5) Code 1746
Sample Cups w/caps (24) Code 1745
pH 4.0 Mini Buffer Tablets (100) Code 3983A-J
pH 7.0 Mini Buffer Tablets (100) Code 3984A-J
pH 10.0 Mini Buffer Tablets (100) Code 3985A-J
Conductivity Standard, 84 μS, 30 mL, 500 mL Code 6312-G, L
Conductivity Standard, 1413 μS, 30 mL, 500 mL Code 6354-G, L
Conductivity Standard, 12,880 μS, 30 mL, 500 mL Code 6317-G, L

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METER DESCRIPTION

Front Panel Description

1. 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 Collar

7. Electrode

NOTE: The Electrode cap is not
shown.

TRACER DISPLAY

1. Bar graph display

2. Measurement units

3. Main display

4. Range calibration
and battery indicators

1
2

5. Temperature display

6. Renew indicator

7. HOLD indicator

6
7

LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 7

5

10

7

0
0

m

t

mg/L

S

pp

2

μ

m

88.88

BAT pH

HML

RENEW

-8.8.8

HOLD

10
20
12

3
4

°C

5

°F

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BASIC OPERATION

Powering the TRACER

The Tracer uses four CR 2032 Lithium Ion batteries. If the batteries are
weak, the BAT indicator will appear on the display. Press the ON/OFF
button to turn the TRACER on or off. The auto power off feature will
shut the TRACER off automatically after 10 minutes after the last button
push.

Automatic Calibration

When the TRACER is turned on, it will enter the Automatic Calibration
mode. SELF and CAL will appear while the calibration is in progress.
After the calibration is completed, the SELF and CAL display icons will
extinguish.

TDS Conversion Ratio

The TDS value is determined by multiplying the conductivity
measurement by a known conversion ratio factor. The meter allows
the selection of a conversion ratio factor in the range of 0.4 to 1.0. The
selected ratio will vary with application but is typically set between 0.5
and 0.7. In the salinity mode, the ratio is fi xed at 0.5. The stored ratio
factor will briefl y appear in the lower temperature display when the
meter is fi rst turned on or when changing the measurement function to
TDS.

To change the ratio while in the TDS measurement mode:

1. Turn the TRACER on.

2. Press and release the CAL/RECALL
button twice. The stored ratio will appear
in the display.

3. Press the MODE/HOLD button to

10

0

20

change the ratio value in steps of 0.1.

4. When the desired ratio is displayed,
press and release the CAL/RECALL

0.7

L

button to store the value and return to the
normal mode.

5. If no buttons are pressed for 5 seconds,
the meter will return to the measurement mode.

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Changing the Displayed Temperature Units

To change the displayed temperature units between °C or °F:

1. With the TRACER off, press and hold the CAL/RECALL button.

2. With the CAL/RECALL button pressed, momentarily press the ON/
OFF button. When SELF CAL appears in the display, release the
CAL/RECALL button. The TRACER will return to the operational
mode with the temperature displayed in the new units.

Data Hold

Press the MODE/HOLD button to freeze the current reading. The HOLD
icon will appear. The reading will be stored. Press the MODE/HOLD key
to return to normal operation.

Auto-Power Off

The auto-power off feature will automatically shut the meter off 10
minutes after the last button was pressed. To disable the auto-off feature:

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

2. Wait for the SELF display screen to appear. This is the second
screen to appear after turning on the meter. IMPORTANT: Review
the instructions for the next 3 steps before proceeding. Step 3 must
be followed immediately by Step 4.

3. Press CAL/RECALL button once.

4. Press MODE/HOLD and ON/OFF buttons simultaneously, for
approximately 2 seconds.

5. oFF will be displayed on the screen. Watch carefully. It will
disappear quickly.

6. To re-enable the auto-off feature, repeat steps 3 and 4. ON will be
briefl y displayed on the screen.

7. The auto power off feature will be restored automatically when the
meter is turned off. Auto-off is the default function when the meter
is turned on.

Low Battery Indicator

The “BAT” indicator will be displayed when the batteries become weak.
Refer to the Maintenance section for battery replacement information.

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Measurement and Display

• 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 suffi cient 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.

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.

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TESTING

Getting Started

• Remove the cap from the bottom of the Tracer to expose the pH

electrode, reference junction and conductivity electrodes.

• Before the fi rst use or after storage, soak the electrode in tap water or

pH 4 buffer solution for about 10 minutes.

• Before fi rst use, hold the meter by the top battery compartment

and swiftly tap the back of the meter downward into your palm
(not a hard surface). This assures that the internal electrolyte
moves to the very tip of the electrode. The electrolyte should fi ll
the circular junction window at the tip of the electrode.

• White KCL crystals may be present in the cap or on the electrode.

This is to be expected depending on the length of time in storage.
These crystals will dissolve while soaking the electrode or they can
be rinsed away with tap water.

• For best results calibrate with pH 7 buffer solution fi rst, then calibrate

with the buffer solution closest to the expected pH value of the solution
or material to be tested.

• To preserve the pH electrode life keep the sponge in the protective cap

soaked with tap water or pH 4 buffer solution.

• For best results, calibrate for conductivity with a standard in the

expected range of the sample. For maximum accuracy calibrate from
low conductivity value standards to high value standards.

• When the meter is calibrated for conductivity, salinity or TDS the

meter must be in the conductivity mode. See page 15. For storage see
page 19.

Changing the Measurement Function

The meter can be set to measure Conductivity, pH, Salinity (ppm), TDS
(ppm), or TDS (mg/L). To change the mode:

1. Turn the TRACER on.

2. Press and hold the MODE/HOLD button for 2 seconds. The display
will begin to scroll through the units.

μS or mS (Conductivity)
pH
ppm S or ppt S (Salinity)
ppm or ppt (TDS)
mg/L (TDS)

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NOTE: 1 part per thousand (ppt) equals 1000 parts per million
(ppm). Example: 3.1 ppt = 3,100 ppm

3. Release the MODE/HOLD key when the desired mode is displayed.

NOTE: The “HOLD” function cannot be used when changing the
measurement function. If “HOLD” is displayed in the lower left corner
of the display, briefl y press the MODE/HOLD button to turn it off.

MEASUREMENT PROCEDURE

Measurement

1. For small samples fi ll a sample cup to
the 20 mL line with the test sample.
Sample depth must be greater than or
equal to 1.5 inches. pH can also be
measured by contact of the electrode
tip with a wet surface. For larger
samples, like pools, go to step 2

2. Press the ON/OFF button. (8888 and
then SELF CAL will appear in the display
during the initial diagnostics).

3. Press and hold the MODE/HOLD button to
scroll to the desired measurement mode.

4. Immerse the TRACER electrode in the sample.
Make sure the electrode is completely submersed.

5. Slowly stir the sample with the TRACER to
remove air bubbles if in the Conductivity,
TDS or Salinity mode.

6. If the TRACER is in the Conductivity, TDS,
or Salinity mode, the meter will automatically
auto-range to the proper range and then display
the reading. The display will fl ash “0000”
while auto-ranging.

7. If the TRACER is in the pH mode, the reading
will fl ash until it has stabilized. This may take
several seconds depending on the buffer capacity
of the sample.

8. Rinse the electrode in distilled water. Replace the cap.

NOTE: 1 part per thousand (ppt) equals 1000 parts per million (ppm).
Example: 3.1ppt=3,100 ppm

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Conductivity

TDS (ppm)

TDS (mgL)

pH

Salinity

0

μS

100.9

25.0

1000

0

ppm

1000

0

790

°C

25.0

°C

mgL

790

25.0

1000

°C

2

7

790

pH

HML

78.6

12

0

1000

Sppm

790

°F

25.0

NOTE: When measuring samples with low conductivity, thoroughly
rinse the probe with distilled or deionized water before placing it in the
sample to avoid contamination of the sample with electrolyte from the
pH reference electrode. Also increase the sample size to 200 to 500 mL
to decrease the chance of contamination. If a sample cup is used, do
not allow the probe to sit in the sample for any longer than necessary
to avoid electrolyte leakage into the sample. Leakage will raise the
conductivity level.

Measuring the TDS of Soil

1. Fill a 50 mL beaker with the soil sample. Tap the beaker lightly on
a hard surface to remove trapped air. Remove excess soil from the
surface.

2. Empty the soil into a 250 mL wide-mouth fl ask.

3. Add 100 mL of distilled water. Stopper and shake vigorously.

4. Wait 30 minute. (Shake the fl ask vigorously three or four times
during this period.)

5. Filter the contents of the fl ask. Collect the fi ltrate in a beaker.

6. Rinse the electrode with distilled or deionized water to remove
impurities.

7. Press the ON/OFF button to turn the TRACER on. Make sure the
meter is in the TDS mode.

8. Immerse the electrode in the fi ltrate. Make sure the tip of the
electrode is completely immersed.

9. Stir the fi ltrate with the electrode to create a homogeneous solution.

10. Gently stir the fi ltrate with the electrode. Read the TDS value of the
fi ltrate from the display.

11. Rinse the electrode in distilled water. Replace the cap.

°C

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Storing Readings

1. After the reading is displayed press and hold
the MODE/HOLD button to store the current
reading. The meter will enter the HOLD
mode and HOLD will be displayed. The
storage location number (1 through 25) will be
displayed on the lower display followed by the
reading being stored.

2

1563

L

HOLD

10

20

μS

4

2. Press the MODE/HOLD button to exit the
HOLD mode and return to normal operation.

3. If an attempt is made to store more than 25 readings, the stored
readings will be overwritten starting with the fi rst reading.

Recalling Stored Readings

NOTE: First ensure that the HOLD symbol is not displayed. If it is, exit
the HOLD function by pressing the MODE/HOLD button.

1. Press the CAL/RECALL button and then press the MODE/HOLD
button. The location number (1 through 25) will briefl y appear and
then the value stored in that location will appear. The displayed units
will fl ash, indicating that the storage recall mode is active.

10

2

20

15

2

1423

L

10

μS

72.3

20

°F

2. The last stored reading taken will be displayed fi rst. To advance to
the previously stored readings, press the MODE/HOLD button. The
location number is displayed fi rst, followed by the reading stored in
that location.

3. To exit the storage mode, press the CAL/RECALL button and the
TRACER will return to normal operation after displaying “End”.

Clearing Stored Memory

Turn the TRACER on. Press and hold the ON/OFF button for 4 seconds.
The display will briefl y display “clr” when the memory is cleared.

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CALIBRATION

For the most accurate results, allow suffi cient 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.

pH

The TRACER can be calibrated at 1, 2 or 3 points. For the most accurate
results with a two point calibration, calibrate the TRACER with a pH 7
buffer fi rst, then calibrate with either a pH 4 or pH 10 buffer whichever
is closest to the pH value of the sample to be tested. When performing a
three point calibration, calibrate with the pH 7 buffer fi rst, followed with
the pH 4 buffer and then the pH 10 buffer.

Preparation of Buffers

1. Fill a sample cup with 20 mL of distilled or deionized water.

2. Add one buffer tablet:
pH 4.0 Code 3983A

pH 7.0 Code 3984A
pH 10.0 Code 3985A

3. Use the tablet crusher (0175) to crush the tablet. Stir until the tablet
has disintegrated.

NOTE: Buffers should be prepared fresh daily.

Calibration

1. Fill a sample cup to the 20 mL line with a buffer solution.

2. Press the ON/OFF button to turn the TRACER ON.

3. Place the electrode in the buffer solution. Press and hold the CAL/
RECALL button until “CAL” appears in the lower display. The
meter will automatically recognize the buffer and calibrate itself to
that value. The circled number on the display will match the value of
the buffer.

NOTE: If the buffer solution is more than 1 pH unit off from 4,
7, or 10, or the electrode slope is low, the meter will assume that
there is an error and the calibration will be terminated. END will be
displayed.

4. During the calibration the pH value on the display will fl ash. When
the calibration is complete, the TRACER will display “SA” and
“End” and return to normal operation.

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5. The appropriately circled indicator (L, M or H) will appear on the
display when a calibration has been completed within one power on
cycle.

6. For a two or three point calibration, repeat steps 1-5 with the
remaining buffers.

7. When the TRACER is turned off, the circled indicator confi guration
and the calibration data will be memorized.

Calibration Reminder

The “CAL” indicator will appear when the TRACER is in the pH mode
and a calibration is required. The “CAL” indicator will appear if the
meter has not been calibrated after 15 on/off cycles of the meter. Some
applications may require more frequent calibrations than others. The
“CAL” indicator is only a reminder and will not affect function in any
way. The indicator will no longer be displayed when the pH electrode is
recalibrated.

RENEW Indicator

A fl ashing “RENEW” indicator will appear on the display to warn that
the electrode is not performing to expected specifi cations. If cleaning
or recalibration does not cause the RENEW indicator to disappear, the
electrode should be replaced. The RENEW indicator will appear when
the pH electrode slope falls below 70% of a nominal slope.

Conductivity

Meter accuracy verifi cation should be performed on a periodic basis
as needed. If calibration is required, the meter must be in the

conductivity mode to perform all calibrations for conductivity,
TDS and salinity. The meter can perform calibrations and store the

data for each of the three ranges–low, medium and high. The automatic
calibration recognition procedure will recognize conductivity standards
of 84μS (Low), 1413μS (Medium) or 12,880μS (12.88mS) (High).
(See Page 6). Always calibrate in the range closest to the expected
measurement value. For salinity samples within the range of 1.00 to

9.99 ppt salinity, calibrate with a 12,880μS calibration standard.

1. Fill a sample cup to 20 mL line with a conductivity standard.
NOTE: The meter allows for a 1, 2, or 3 point calibration. If

calibration is done for more than one point, the lowest concentration
should be done fi rst to obtain the best accuracy. Calibrate the ranges
from low to high

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2. Press the ON/OFF button to turn the TRACER on. Insert the
electrode into the standard. Tap or stir the sample with the Tracer to
dislodge air bubbles.

3. Press and hold the CAL/RECALL button for approximately 2
seconds until the display begins to fl ash.

4. The meter will automatically recognize and calibrate to the
conductivity standard. The display will briefl y indicate “SA” and
“End” and then return to the measurement mode.

NOTE: “SA” will not appear if the calibration fails.

5. The calibration range indicator will appear on the display for each
range that is calibrated during a power on cycle.

L

Low Range, 84 μS/cm

M

Medium Range, 1413 μS/cm

H

High Range, 12.88 mS/cm (12,880 μS/cm)

NOTE: Each time the calibration mode is entered all calibration range
indicators will be cleared, but only the calibration data for the currently
selected range will be replaced. The calibrations for the other two ranges
will be saved even though the indicators for those ranges are no longer
displayed. Calibration of all three ranges must be performed during one
power on period for all three calibration range indicators to be displayed.

NOTE: As with all combination pH/conductivity probes, at low
conductivity levels the fl ow of the pH electrolyte may affect the readings
and result in artifi cially high conductivity readings. To eliminate the
interference, low level conductivity or TDS measurements should be
taken with a meter that measures conductivity only.

LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 17

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OPERATIONAL MATRIX

Function/
Resulting
Action Power Mode Key Press Sequence

On/Off On or Off Any Momentary press of ON/

Calibration On pH or Con Press & hold CAL/

Store Reading On Any Momentary press of

Hold Release On Hold Momentary press of

Enter Memory
Retrieval

Scroll Stored
Readings

Exit Memory
Retrieval

Clear Stored
Memory

Change
Measurement
Mode

Enter CON/
TDS Ratio

Change CON/
TDS Ratio

Exit CON/TDS
Ratio

On Any

Measurement
Mode

On Memory Recall Momentary press of

On Memory Recall Momentary press of CAL/

On Any Memory

Mode

On Any Press and hold the MODE/

On TDS (ppm or

mg/L)

On TDS (ppm or

mg/L)

On TDS (ppm or

mg/L)

OFF button

RECALL button for 2
seconds until CAL is
displayed

MODE/HOLD button

MODE/HOLD button

Momentary press of CAL/
RECALL button followed
by a momentary press
of MODE/HOLD button
within 4 seconds.

MODE/HOLD button.
Displays last in fi rst out.

RECALL button

Press and hold the ON/OFF
button for 4 seconds until
“clr” is displayed.

HOLD button for at least 2
seconds Modes will scroll
by until button is released

Press and release the CAL/
RECALL button twice in
succession

Momentary press of
MODE/HOLD button.
Each press increases ratio
by 0.1 from 0.4 to 1.0.

Momentary press of CAL/
RECALL button.

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Function/
Resulting
Action Power Mode Key Press Sequence

Change
Temperature
Units

Override Auto
Power Off

Default Reset Off N/A Simultaneously press ON/

Off Off Press and hold CAL/

On Any

Measurement
Mode

RECALL button then
momentarily press ON/
OFF button. Release CAL/
RECALL button after “Self
Cal” is displayed.

Momentarily press CAL/
RECALL button then
simultaneously press
and hold ON/OFF and
MODE/HOLD buttons for
2 seconds until “oFF” is
displayed.

OFF, CAL/RECALL and
MODE/HOLD buttons
momentarily. “dFlt” will be
displayed.

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MAINTENANCE

Storage

1. Rinse the electrode in distilled or deionized water.

2. Store the electrode with the cap on. Keep the sponge in the cap

soaked with tap water or pH 4 buffer solution. Do not allow
sensor to dry out. Store upright.

3. Always rinse the electrode in deionized water between
measurements to avoid cross contamination. Double rinsing is
recommended when high accuracy is required.

4. Salt deposits may build up in the storage cap and should periodically
be rinsed away. These deposits could affect measurements at low
conductivity.

Battery Replacement

1. Twist off the battery compartment cap.

2. Hold the battery housing in place with one fi nger. Remove the
battery carrier by pulling on the small tabs.

3. Replace the four CR2032 batteries. Observe polarity.

4. Replace the battery compartment cap.

Electrode Care

1. Always rinse the electrode in distilled or deionized water between
measurements to avoid cross-contamination of the samples. Double
rinsing is recommended when high accuracy is required.

2. Do not touch the electrodes. Touching the surface of the platinized
electrodes may damage and reduce the life of the electrodes.

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REPLACING THE ELECTRODE

1. Unscrew and remove the electrode collar. Turn collar counter­clockwise.

2. Gently rock the electrode side to side, while pulling it away from the
meter, until it disconnects from the electrode socket.

3. To attach an electrode, align the slots and carefully plug the
electrode into the meter socket.

4. Firmly tighten the electrode collar to create a seal with the rubber
gasket between the electrode and the meter.

Electrode Cleaning Recommendations

Do not soak the electrode in the solutions for longer than the
recommended length of time. To do so may cause a reference potential
shift which will cause degradation in performance or failure. When
cleaning the electrode, take care not to scratch or damage the sensing
surface or the platinized electrode surfaces.

Contaminant Cleaning Solution Procedure

Water soluble Deionized water Soak or scrub with a soft brush.

Grease and oil Warm water and

Heavy grease Alcohol Soak for a maximum of

Lime and
hydroxide
coatings

household detergent

10% Acetic acid Soak until coating dissolves,

Recondition in pH 4 or 7 buffer
for 1 hour.

Soak or scrub with a soft brush,
maximum 10 minutes. Rinse
thoroughly with DI water.
Recondition in pH 4 or 7 buffer
for 1 hour.

5minutes. Scrub with a soft
brush. Rinse thoroughly with DI
water. Recondition in pH 4 or 7
buffer for 1 hour.

maximum 5 minutes. Rinse
thoroughly with DI water.
Recondition in pH 4 or 7 buffer
for 1 hour.

LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 21

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TROUBLESHOOTING

Problem Possible Cause Action

Reading is
frozen

"BAT" message

Meter will not
calibrate in pH

Meter will not
calibrate in
conductivity
mode

Unit will not
turn on

“RENEW”
message

Unit will not
respond to any
key presses

Unit is in "HOLD" mode

Batteries are low Replace batteries.

Low pH slope Replace electrode.

Clogged or contaminated
reference junction

Damaged or worn
sensing membrane

Contaminated pH
buffers

Trapped air bubbles Tap or stir to release air bubbles.

Dirty probe Clean conductivity probe.

Damaged conductivity
probe

Contaminated
conductivity standards

Batteries low or dead Replace batteries.

Battery installed with
incorrect polarity

pH sensor needs
recalibration

pH sensor slope has
fallen below acceptable
limits

Internal fault Perform hard reboot: Remove

Press MODE button to exit
"HOLD" mode.

Clean junction.
See cleaning instructions.

Replace electrode.

Use fresh buffers.

See cleaning instructions.

Replace electrode.

Use fresh standards.

Replace batteries, observe
polarity.

Recalibrate unit.
Use fresh buffers.

Replace electrode.

batteries, hold ON/OFF switch
down for 5 seconds, replace
batteries.

22 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction

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WARRANTY

LaMotte Company warrants this instrument to be free of defects in parts
and workmanship for 1 year from the date of shipment and warrants this
probe be free of defects in parts and workmanship for 6 months from the
date of shipment. If it should become necessary to return the instrument for
service during or beyond the warranty period, contact our Technical Service

shipping charges, freight, insurance and proper packaging to prevent damage
in transit. This warranty does not apply to defects resulting from action of
the user such as misuse, improper wiring, operation outside of specifi cation,
improper maintenance or repair, or unauthorized modifi cation. LaMotte
Company specifi cally disclaims any implied warranties or merchantability
or fi tness for a specifi c purpose and will not be liable for any direct, indirect,
incidental or consequential damages. LaMotte Company’s total liability is
limited to repair or replacement of the product. The warranty set forth above
is inclusive and no other warranty, whether written or oral, is expressed or
implied.

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