LaMotte PockeTester 1766 User manual

pH/Conductivity/TDS/Salinity Meter!
Tracer pH/TDS/Salt
PockeTesterTM
Code 1766
Do Not allow pH sensor to dry out.
¬ Store Upright
¬ Before first use, tap meter against
palm to move electrolyte to tip.
See pages 10 and 19.
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TRACER
pH/TDS/SALT POCKETESTERTM CODE 1766
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
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4 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
INTRODUCTION
Congratulations on your purchase of the pH/TDS/SALT (pH/
conductivity/TDS/Salinity) TRACER PockeTester. The TRACER is
a revolutionary, first 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.
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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 5
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 Permanent gel, non-refillable
Conductivity Range 0 to 199.9 μS/cm
200 to 1999 μS/cm
2.00 to 19.99 μS/cm
TDS Range 0 to 99.9 ppm and mg/L
100 to 999 ppm and mg/L
1.00 to 9.99 ppt and g/L
(variable ratio)
Salinity Range 0 to 99.9 ppm S
100 to 999 ppm S
1.00 to 9.99 ppt S
(fixed ratio of 0.5)
TDS Ratio 0.4 to 1.0, adjustable
Salinity Ratio 0.5 fixed
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)
±5.4°F; 3°C; (from 122 to 194°F; 50 to 90°C)
Conductivity ATC Range 32.0°F to 140°F (0.0°C to 60.0°C)
Accuracy Conductivity: ±2% FS
TDS: ±2% FS
Salinity: ±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
(override available)
Operating Conditions 23 to 122 °F (–5 to 50 °C)
NOTE: 1 part per thousand (ppt) equals 1000 parts per million (ppm).
Example: 3.1ppt=3,100 ppm
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6 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 7
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
5. Temperature display
6. Renew indicator
7. HOLD indicator
2
4
1
6
7
3
5
HML
0
0
2
10
20
12
5
10
7
BAT pH
mg/L
m
μS
t
m
pp
88.88
°C
°F
-8.8.8
RENEW
HOLD
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8 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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 fixed at 0.5. The stored ratio
factor will briefly appear in the lower temperature display when the
meter is first 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
change the ratio value in steps of 0.1.
4. When the desired ratio is displayed,
press and release the CAL/RECALL
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.
L
020
10
0.7
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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 9
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
briefly 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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10 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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 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.
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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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 11
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.
• Before first 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 fill
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 first, 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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12 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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, briefly press the MODE/HOLD button to turn it off.
MEASUREMENT PROCEDURE
Measurement
1. For small samples fill 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 flash “0000”
while auto-ranging.
7. If the TRACER is in the pH mode, the reading
will flash 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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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 13
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 flask.
3. Add 100 mL of distilled water. Stopper and shake vigorously.
4. Wait 30 minute. (Shake the flask vigorously three or four times
during this period.)
5. Filter the contents of the flask. Collect the filtrate 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 filtrate. Make sure the tip of the
electrode is completely immersed.
9. Stir the filtrate with the electrode to create a homogeneous solution.
10. Gently stir the filtrate with the electrode. Read the TDS value of the
filtrate from the display.
11. Rinse the electrode in distilled water. Replace the cap.
01000
Sppm
790
°C
25.0
Salinity
HML
pH
212
7
pH
790
°F
78.6
TDS (mgL)
01000
mgL
790
°C
25.0
TDS (ppm)
01000
ppm
790
°C
25.0
Conductivity
01000
μS
°C
100.9
25.0
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14 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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. 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 first 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 briefly appear and
then the value stored in that location will appear. The displayed units
will flash, indicating that the storage recall mode is active.
2. The last stored reading taken will be displayed first. To advance to
the previously stored readings, press the MODE/HOLD button. The
location number is displayed first, 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 briefly display “clr” when the memory is cleared.
L
220
10
μS
1563
4
HOLD
L
220
10
μS
1423
°F
72.3
220
10
15
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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 15
CALIBRATION
For the most accurate results, 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.
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 first, 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 first, 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 flash. When
the calibration is complete, the TRACER will display “SA” and
“End” and return to normal operation.
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16 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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 configuration
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 flashing “RENEW” indicator will appear on the display to warn that
the electrode is not performing to expected specifications. 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 verification 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 first to obtain the best accuracy. Calibrate the ranges
from low to high
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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 17
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 flash.
4. The meter will automatically recognize and calibrate to the
conductivity standard. The display will briefly 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.
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 flow of the pH electrolyte may affect the readings
and result in artificially high conductivity readings. To eliminate the
interference, low level conductivity or TDS measurements should be
taken with a meter that measures conductivity only.
H
M
LLow Range, 84 μS/cm
Medium Range, 1413 μS/cm
High Range, 12.88 mS/cm (12,880 μS/cm)
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18 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
OPERATIONAL MATRIX
Function/
Resulting
Action Power Mode Key Press Sequence
On/Off On or Off Any Momentary press of ON/
OFF button
Calibration On pH or Con Press & hold CAL/
RECALL button for 2
seconds until CAL is
displayed
Store Reading On Any Momentary press of
MODE/HOLD button
Hold Release On Hold Momentary press of
MODE/HOLD button
Enter Memory
Retrieval
On Any
Measurement
Mode
Momentary press of CAL/
RECALL button followed
by a momentary press
of MODE/HOLD button
within 4 seconds.
Scroll Stored
Readings
On Memory Recall Momentary press of
MODE/HOLD button.
Displays last in first out.
Exit Memory
Retrieval
On Memory Recall Momentary press of CAL/
RECALL button
Clear Stored
Memory
On Any Memory
Mode
Press and hold the ON/OFF
button for 4 seconds until
“clr” is displayed.
Change
Measurement
Mode
On Any Press and hold the MODE/
HOLD button for at least 2
seconds Modes will scroll
by until button is released
Enter CON/
TDS Ratio
On TDS (ppm or
mg/L)
Press and release the CAL/
RECALL button twice in
succession
Change CON/
TDS Ratio
On TDS (ppm or
mg/L)
Momentary press of
MODE/HOLD button.
Each press increases ratio
by 0.1 from 0.4 to 1.0.
Exit CON/TDS
Ratio
On TDS (ppm or
mg/L)
Momentary press of CAL/
RECALL button.
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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 19
Function/
Resulting
Action Power Mode Key Press Sequence
Change
Temperature
Units
Off Off Press and hold CAL/
RECALL button then
momentarily press ON/
OFF button. Release CAL/
RECALL button after “Self
Cal” is displayed.
Override Auto
Power Off
On Any
Measurement
Mode
Momentarily press CAL/
RECALL button then
simultaneously press
and hold ON/OFF and
MODE/HOLD buttons for
2 seconds until “oFF” is
displayed.
Default Reset Off N/A Simultaneously press ON/
OFF, CAL/RECALL and
MODE/HOLD buttons
momentarily. “dFlt” will be
displayed.
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20 LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction
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 finger. 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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LaMotte TRACER pH/TDS/Salt PockeTesterTM 1766 Instruction 21
REPLACING THE ELECTRODE
1. Unscrew and remove the electrode collar. Turn collar counter-
clockwise.
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.
Recondition in pH 4 or 7 buffer
for 1 hour.
Grease and oil Warm water and
household detergent
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.
Heavy grease Alcohol Soak for a maximum of
5minutes. Scrub with a soft
brush. Rinse thoroughly with DI
water. Recondition in pH 4 or 7
buffer for 1 hour.
Lime and
hydroxide
coatings
10% Acetic acid Soak until coating dissolves,
maximum 5 minutes. Rinse
thoroughly with DI water.
Recondition in pH 4 or 7 buffer
for 1 hour.
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