Page 1
Open this leaflet for calibration/testing/maintenance
instructions.
Electrode Maintenance
• Rinse the electrode with tap water or electrode
storage solution after each measurement.
• Periodic soaks in warm pH 4.01 buffer will help
remove contaminants.
• If possible, keep a small piece of paper or sponge
in the electrode cap – moistened with clean water
or electrode storage solution (NOT deionized
water) and close the cap over the electrode.
When you need a new electrode, see “Electrode
Replacement” on insert in back of box.
Changing Batteries
1. Open battery
compartment
lid (with
attached
lanyard loop).
2. Remove old
batteries;
replace with
fresh ones.
Note polarity
(shown in Diagram 1).
+
Diagram 1
Self-Diagnostic Messages
bAt Weak batteries – replace with fresh ones
specified by manufacturer.
Er1 Wrong or bad buffer value, or electrode is not in
contact with solution, or electrode is failing.
Or, Ur Over r ange / under range signal, or electrode
is not in contact with solution, or electrode is failing.
Warranty
Eutech Instruments warrants its meter free from
manufacturing defects for 2 years and electrode
module for 6 months. If repair, adjustment or
replacement is necessary and has not been the result
of abuse or misuse within the time period, please
return the tester – freight prepaid – and correction
will be made without charge. Out of warranty products
will be repaired on a charge basis.
Return Of Items
Authorization must be obtained from Eutech’s
distributor before returning items for any reason.
When applying for authorization, please include
information regarding the reason the item(s) are to
be returned.
Note: We reserve the right to make improvements in
design, construction and appearance of products
without notice. Prices are subject to change without
notice.
• Waterproof & Floats
• Replaceable Double
Junction Electrode
• NIST or USA Buffer
Selection
Page 2
WP pHScan 3 Instructions
Before You Begin
Remove electrode cap. To condition electrode,
immerse electrode in electrode solution, buffer
or tap water for at least 30 minutes. DO NOT use
deionized water
Calibration
Calibration should be done regularly, typically
everyday that the tester is used. You can calibrate
at up to three points (pH 4.01, 7.00 and 10.01
or 4.01, 6.86 and 9.18).
1. Press ON/OFF button to switch unit on.
2. Dip electrode about 2 to 3 cm into pH buffer
solution.
3. Press CAL button to enter Calibrate (CAL)
mode. ‘CAL’ flashes on the display. Then, a
pH value close to the pH buffer value will
flash repeatedly.
To abort calibration, press CAL again to
resume measuring mode.
4. After about 2 minutes when the
reading has stabilized, press the
HOLD/CON button to confirm
calibration. The display will show ‘CO’
and then switch to the buffer value
reading.
5. Repeat with other buffers if
necessary. Rinse electrode in tap
water before dipping into next buffer.
Insufficient sampling time. If
the tester does not have a long
enough exposure to the buffer, a stable
calibration point will not be reached.
Wait for about 2 minutes when the
reading has stabilized, press the
HOLD/CON.
Failure to re-hydrate the
electrode. A dry electrode will give
fluctuating readings while it
re-hydrates in a buffer, causing error.
Buffer Set Selection
To choose USA (4.01, 7.00, 10.01) or NIST (4.01,
6.86, 9.18) buffers.
1. With tester off, hold HOLD/CON key while
pressing and releasing ON/OFF key.
2. The display will show “bUF” flashing.
3. Press HOLD/CON key. The display will show
either “USA” or “NST”.
4. Press CAL key to toggle between USA and NIST
buffer sets.
5. Press HOLD/CON key to confirm.
pH Testing
1. Remove cap from the electrode and press the
ON/OFF button to switch tester on.
2. Dip the electrode about 2 to 3 cm into the test
solution. Stir once and let the reading stabilize.
3. Note the pH or press HOLD/CON button to freeze
the reading. Press HOLD/CON again to release
the reading.
4. Press ON/OFF to turn off tester. If you do not
press a button for 8.5 minutes the tester will
automatically shut off to conser ve batteries.
Reset To Factory Default
You can reset calibration data to factory default
settings. This is extremely useful when you want to
take a new set of pH measurements or when using
a new replacement electrode.
1. With tester off, hold CAL key while pressing ON/
OFF key.
2. The display will show “rSt” flashing.
3. Press HOLD/CON key to confirm. The display
will flash “YES” for 2 seconds and the tester will
go back to measurement mode.
4. To exit without confirmation, press CAL key. The
display will flash “NO” for 2 seconds and the
tester will go back to measurement mode.
68X247746 11/00 Rev 0
Page 3
Open this leaflet for calibration/testing/maintenance
instructions.
Electrode Maintenance
• Rinse the electrode with tap water or electrode
storage solution after each measurement.
• Periodic soaks in warm pH 4.01 buffer will
help remove contaminants.
• If possible, keep a small piece of paper or sponge
in the electrode cap – moistened with clean water
or electrode storage solution (NOT deionized
water) and close the cap over the electrode.
When you need a new electrode, see “Electrode
Replacement” on insert in back of box.
Changing Batteries
1. Open battery
compartment
lid(with
attached
lanyard loop).
2. Remove old
batteries;
replace
with fresh
ones. Note
polarity (shown in Diagram 1)
+
Diagram 1
Self-Diagnostic Messages
bAt Weak batteries – replace with fresh ones
specified by manufacturer.
Er1 Wrong or bad buffer value, or electrode is not in
contact with solution, or electrode is failing.
Or, Ur Over range / under range signal, or electr ode
is not in contact with solution, or electrode is failing.
Warranty
Eutech Instruments warrants its meter free from
manufacturing defects for 2 years and electrode
module for 6 months. If repair, adjustment or
replacement is necessary and has not been the result
of abuse or misuse within the time period, please
return the tester – freight prepaid – and correction
will be made without charge. Out of warranty products
will be repaired on a charge basis.
Return Of Items
Authorization must be obtained from Eutech’s
distributor before returning items for any reason.
When applying for authorization, please include
information regarding the reason the item(s) are to
be returned.
Note: We reserve the right to make improvements in
design, construction and appearance of products
without notice. Prices are subject to change without
notice.
• Waterproof & F loats
• Replaceable Double
Junction Electrode
• Temperature Display
• NIST or USA Buffer
Selection
Page 4
WP pHScan 3+ Instructions
Before You Begin
Remove electrode cap. To condition electrode,
immerse electrode in electrode solution, buffer
or tap water for at least 30 minutes. DO NOT use
deionized water
Calibration
Calibration should be done regularly, typically
everyday that the tester is used. You can calibrate
at up to three points (pH 4.01, 7.00 and 10.01
or 4.01, 6.86 and 9.18).
1. Press ON/OFF button to switch unit on.
2. Dip electrode about 2 to 3 cm into pH buffer
solution.
3. Press CAL button to enter Calibrate (CAL)
mode. ‘CAL’ flashes on the display. Then, a
pH value close to the pH buffer value will
flash repeatedly.
To abort calibration, press CAL again to
resume measuring mode.
4. After about 2 minutes when the
reading has stabilized, press the HOLD/
CON button to confirm calibration. The
display will show ‘CO’ and then switch
to the buffer value reading.
5. Repeat with other buffers if
necessary. Rinse electrode in tap
water before dipping into next buffer.
Insufficient sampling time. If
the tester does not have a long
enough exposure to the buffer, a
stable calibration point will not be
reached. Wait for about 2 minutes
when the reading has stabilized,
press the HOLD/CON.
Buffer Set Selection
To choose USA (4.01, 7.00, 10.01)
or NIST (4.01, 6.86, 9.18) buffers.
1. With tester off, hold HOLD/CON key
while pressing and releasing ON/OFF
key.
2. The display will show “bUF” flashing.
3. Press HOLD/CON key. The display
will show either “USA” or “NST”.
4. Press CAL key to toggle between USA and NIST
buffer sets.
5. Press HOLD/CON key to confirm.
pH Testing
1. Remove cap from the electrode and press the
ON/OFF button to switch tester on.
2. Dip the electrode about 2 to 3 cm into the test
solution. Stir once and let the reading stabilize.
3. Note the pH or press HOLD/CON button to freeze
the reading. Press HOLD/CON again to release
the reading.
4. Press ON/OFF to turn off tester. If you do not
press a button for 8.5 minutes the tester will
automatically shut off to conserve batteries.
Reset To Factory Default
You can reset calibration data to factory default
settings. This is extremely useful if you want to take
a new set of pH measurements or using a new
replacement electrode.
1. With tester off, hold CAL key while pressing ON/
OFF key.
2. The display will show “rSt” flashing.
3. Press HOLD/CON key to confirm. The display
will flash “YES” for 2 seconds and the tester will
go back to measurement mode.
4. To exit without confirmation, press CAL key. The
display will flash “NO” for 2 seconds and the
tester will go back to measurement mode.
Temperature Display
The feature is extremely useful for you to note the
temperature of sample you are measuring.
1. With tester on, press HOLD/CON key. The display
will show “HO” momentarily.
2. Press CAL key.
3. Temperature value is displayed in °C for 5
seconds.
4. The tester will automatically go back to pH
measurement mode.
68X247747 11/00 Rev 0
Page 5
Twist-off
Battery
Compartment
Temperature
Display
Replaceable
Sensor
• All push-button calibration
• Displays measured units for clarity
• Fast, stable, repeatable readings
• Available through authorized distributors
SPECIFICATIONS
Tester pHScan 3 pHScan 3+
pH Range 0.00 to 15.00 pH
Resolution 0.01 pH
Accuracy ±0.02 pH
Calibration USA (pH 4.01, 7.00, 10.01) or
Buffer option NIST (pH 4.01, 6.86, 9.18)
Calibration Up to 3 points
points (USA or NIST)
Temperature - 0.0 to 50.0 °C
Range
Resolution - 0.1 °C
Accuracy - ±1.0 °C
ATC 32 to 122 °F / 0 to 50 °C
Operating Temp 32 to 122 °F / 0 to 50 °C
Special On/Off; HOLD; CA (Calibrate);
Functions CO (Confirm display); auto-buffer
Power Battery Four X 1.5V (Type: A76, LR 44 or
Dimension; Tester: 16.5 cm x 3.8 cm; 90 g
Weight Boxed: 22 cm x 6 cm x 5 cm; 170g
Eutech Instruments Pte Ltd
Tel: (65)778 6876 Fax: (65)773 0836
E-Mail: marketing@eutechinst.com
Web-Site: http://www.eutechinst.com
recognition; auto-shutoff after
8.5 min. non-use.
V136A); > 150 hrs continuous use
Manufactured By:
Blk 55, Ayer Rajah Crescent,
#04-14/24, Singapore 139949
Made in Singapore
68X247824 11/00 Rev 0
REMOVE THE OLD ELECTRODE
(Picture A)
A
(Picture B)
REPLACE THE ELECTRODE
B
Electrode Replacement
You can replace the electrode module at
the fraction of the cost of a new tester.
When the tester fails to calibrate, gives
fluctuating readings in buffers,shows
error messages ‘Er1’, ‘Or’ or ‘Ur’ in a
buffer, and the procedures in the
Maintenance section do not help, you
need to change the electrode.
1. With dry hands, grip the ribbed tester
collar with electrode facing you. Twist
the collar counter clockwise (see picture
A). Save the ribbed tester collar and
O-ring for later use.
2. Pull the old electrode module away from
the tester.
3. Align the four tabs on the new module
so that they match the four slots on the
tester (see picture B).
4. Gently push the module onto the slots
to sit it in position. Push the smaller
O-ring fully onto the new electrode
module. Push the collar over the module
and thread it into place by firmly twisting
clockwise.
Applications
Water quality testing • Pools • Spas
• Aquariums • Aquaculture • Hydroponics
• Ecology studies • Water and wastewater
treatment • Boilers • Steam generators
• Car washes • Sanitation plants
• Labs • and more!
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