PCTSTestr
™
50 Pocket Tester
Measurement Parameter Setting
1. Press ON/OFF ( ) to power on the tester.
2. Press MENU/
v
to enter setup window. Press HOLD/
to select Measure. The display shows pH, Cond, TDS
and Salinity.
3. Scroll down by pressing MENU/
v
to toggle between pH,
Cond, TDS and Salinity. Press HOLD/
to select pH.
4. The display shows the selected parameter with a .
pH Buffer Set Selection
PCTSTestr 50 Pocket Tester features USA (pH 4.01, pH 7.00
and pH 10.01) or NIST (pH 4.01, pH 6.86, and pH 9.18)
standards. Select either one to suit your requirements.
1. Press MENU/
v
to enter setup window. Press HOLD/
to select Settings. The display shows Buffer, TDS Factor
and Backlight.
Settings
Temp Set
Reset
Cond
TDS
Salinity
hold
pH
menu
hold
pH
Measure
2. Press HOLD/
to select Buffer. Display shows USA and NIST.
3. Press HOLD/
to select USA or scroll down by pressing
MENU/
v
to toggle between the two buffer standards.
4. The display shows the selected buffer standard with a .
TDS Factor Setting
1. Press MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Settings.
2. Press HOLD/
to select Settings. The display shows
Buffer, TDS Factor and Backlight.
3. Scroll down by pressing MENU/
v
to toggle between the
Buffer, TDS Factor and Backlight. Press HOLD/
to select
the TDS Factor.
4. Press HOLD/
to select the default TDS factory setting or
MENU/
v
to adjust the setting.
5. Press HOLD/
to confirm the selection of the setting. The
display shows the selected value (TDS factor) with a .
USA
Measure
Temp Set
Reset
TDS Factor
Backlight
hold
NIST
menu
hold
Buffer
Settings
hold
USA
Adjust
TDS Factor
0.71
Measure
Temp Set
Reset
Buffer
Backlight
hold
menu
hold
TDS Factor
Settings
hold
0.66
Buffer
TDS Factor
Backlight
Backlight
ON
OFF
Measure
Temp Set
Reset
hold
menu
hold
Settings
hold
OFF
°F
Measure
Settings
Reset
Temp Cal
Temp Coeff
hold
menu
hold
Set °C/°F
Temp Set
hold
°C
°C
Temp Cal
23 4 °C
23 4 °C
Measure
Settings
Reset
Set °C/°F
Temp Coeff
hold
menu
hold
Temp Cal
Temp Set
hold
2.00
Getting Started
The PCTSTestr 50 Pocket Tester has been factory calibrated
and usually works well out of the box. However, after
extended periods of non-use, it is best to remove the sensor
cap and soak the sensor in warm tap water for 10 minutes or
so. Prior to taking the measurements, periodic calibration
with certified standards is recommended for best accuracy.
Backlight Settings
1. Press MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Settings.
2. Press HOLD/
to select Settings. The display shows
Buffer, TDS Factor and Backlight.
3. Scroll down by pressing MENU/
v
to toggle between
Buffer, TDS Factor and Backlight. Press HOLD/
to select
Backlight.
4. The display shows ON and OFF. Scroll down by pressing
MENU/
v
to toggle between ON and OFF. Backlight ON
increases readability in low-light conditions.
5. Press HOLD/
to select the desired backlight option. The
display shows the selected backlight option with a .
Temperature Settings
1. Press MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Temp Set. Press HOLD/
to select Temp Set. The display shows Set °C/°F, Temp Cal
and Temp Coeff.
2. Press HOLD/
to select Set °C/°F. Scroll down by pressing
MENU/
v
to toggle between °C and °F.
3. Press HOLD/
to select temperature unit. The display
shows the selected temperature setting with a .
Temperature Calibration
1. Press MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Temp Set.
2. Press HOLD/
to select Temp Set. The display shows
Set °C/°F, Temp Cal and Temp Coeff.
3. Scroll down by pressing MENU/
v
to toggle between
Set °C/°F, Temp Cal and Temp Coeff. Press HOLD/
to select Temp Cal.
4. The lower display shows the current measured
temperature reading based on the last set offset and the
upper display shows the current measured temperature
reading based on factory default calibration.
5. Dip the tester into a solution of known temperature and
allow time for the built-in temperature sensor to stabilize.
6. Press MENU/
v
to adjust the temperature value or press
the HOLD/
to confirm the calibrated value as the new
temperature value of the solution.
Note: To exit this program without confirming the
calibration, press CAL/ESC.
Applications
• Agriculture
• Aquaculture
• Aquariums and
fish farms
• Boiler blow-
down
• Car washes
• Drinking water
• Ecology
• Electroplating
rinse tanks
• Food sectors
• Hydroponics
• Labs
• Printing industry
• Swimming pools
• Verification of
reverse osmosis
system operation
• Water and waste
-
water treatment
Operating Instructions
1
2
3
Calibration for Conductivity, TDS, or Salinity
For best results, periodic calibration with an accurate
standard is recommended prior to measurement. Use the
calibration standard value that is close to your intended
sample value. The tester will retain one calibration value in
each mode (conductivity, TDS, salinity) when the instrument
is powered off. The conductivity value can be calibrated
automatically or manually, while the TDS & salinity values
require manual calibration. The tester will begin in the
measurement mode that was used when it was powered
off. See “Measurement Parameter Setting” to change the
desired parameter.
Automatic Calibration for Conductivity
1. Remove the cap and press ON/OFF ( ) to power on.
2. Dip the sensor in at least 30 mm of calibration standard.
3. Stir gently and press CAL/ESC to begin the calibration.
4. The display will show CAL followed by the default value.
CAL is indicated on the display during calibration mode.
5. If the reading is within the calibration range of the automati-
cally recognized standards; 80 (84 μS/cm), 1410 (1413 μS/cm),
or 12.90 (12.88 mS/cm), the icon is displayed when the
automatic calibration standard value has been detected.
6. Press HOLD/
to accept the auto conductivity standard
and finish the calibration.
7. Display returns to Measurement window.
Manual Calibration
When the conductivity reading is outside calibration range
of the automatic conductivity standards or when TDS or
salinity is used, the tester will require manual adjustment.
1. Repeat steps 1 to 4 from “Automatic Calibration for
Conductivity”.
2. Press MENU/
v
to manually adjust the value to the
desired reading.
Note: The adjustment will decrease only, however the
adjustment will eventually cycle to the highest available
value after decreasing by 40% of the initial value.
3. Press HOLD/
to accept and finish the calibration when
the desired value is selected.
Note: To abort calibration, press CAL/ESC to escape.
µS/cm
844
23.5°C
µS/cm
844
1413
Place the tester in
the calibration STD
to start or press
to escape.
cal
esc
cal
esc
CAL
CAL
COND
Factory
Reset
User Reset
Yes
No
Measure
Settings
Temp Set
hold
menu
hold
Reset
hold
4. Once the calibration is finished and user has accepted
the changes, measurement window will now show the
calibrated reading.
Note: The auto conductivity standards are 84 μS/cm,
1413 μS/cm & 12.88 mS/cm.
pH Calibration
Calibration should be done regularly, recommended once a
week. Calibrate up to three points using either the USA or
the NIST buffer set standards.
1. Press ON/OFF ( ) to power on the tester if needed.
2. Dip electrode about 2 cm to 3 cm into the pH standard
buffer solution.
3. Stir gently and press CAL/ESC to enter calibration mode. The
CAL indicator will be displayed. The upper display will show
the measured reading based on the last calibration while the
lower display will indicate the pH standard buffer solution.
Note: To abort calibration, press CAL/ESC to escape.
4. Allow about 2 minutes for the tester reading to stabilize.
The timer icon blinks during this time. Once the reading
is stabilized, the timer stops blinking. Automatic
confirmation happens when the buffer is found and
the display returned to measurement window with
reading calibrated to pH standard buffer solution.
5. Repeat with other buffers if necessary. Rinse electrode
before dipping into next buffer.
Note:
The calibration mode allows you to perform up to
three calibration points. Calibration is automatically con-
firmed with the buffer identification. No user interaction is
required after starting the calibration by pressing CAL/ESC.
Measurement
1. Press ON/OFF ( ) to power on the tester if needed.
2. Dip the electrode in about 2 cm to 3 cm into the test
solution. Stir and let the reading stabilize. The timer icon
will blink during this time. Once the reading is stabilized,
the timer stops blinking and will appear to indicate the
stability of the reading.
CAUTION: Testing dry samples is not accurate
and can lead to sensor damage or
breakage. Soils must be wet and
free of particulates that may scratch
the glass sensor. Excessive force
into dry samples can cause glass
breakage.
3. Note the value or press HOLD/
to freeze the reading.
To release the reading, press HOLD/
again.
4. Press ON/OFF ( ) for 3 seconds to turn off tester. If you
do not press a button for 8.5 minutes, the tester will
automatically shut off to conserve batteries.
User Reset
Reset to the user’s default settings by using the User Reset
function. Buffer selection and user temperature calibration
are not affected by the user reset function.
1. Press MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Reset. Press HOLD/
to select
Reset. The display shows User Reset and Factory Reset.
2. Press HOLD/
to select User Reset.
3. The display automatically shows No and Yes. Scroll down
by pressing MENU/
v
to toggle between No and Yes.
4. Press HOLD/
to confirm either No or Yes. The display
shows the User Reset option with a .
Temperature Coefficient
1. Pres MENU/
v
to enter setup window. Scroll down by
pressing MENU/
v
to select Temp Set.
2. Press HOLD/
to select Temp Set. The display shows
Set °C/°F, Temp Cal and Temp Coeff.
3. Scroll down by pressing MENU/
v
to toggle between
Set °C/°F, Temp Cal and Temp Coeff.
4. Press HOLD/
to select Temp Coeff or MENU/
v
to
adjust the Temp Coeff.
5. Press HOLD/
to confirm the Temp Coeff value. The
new value is automatically confirmed with a .
pH
7.01
25.5°C
pH
7.45
7.01
Place the tester
in the buffer to
start or press
to escape.
cal
esc
cal
esc
CAL
CAL
pH
µS/cm
844
820
µS/cm
844
1413
Place the tester in
the calibration STD
to start or press
to escape.
cal
esc
cal
esc
CAL
CAL
CAL
µS/cm
1413
23.5°C
COND
4
5
6
Set °C/°F
Temp Cal
hold
Adjust
Temp Coeff
2.00
menu
2.00
hold
Temp Coeff
hold
Measure
Settings
Reset
Temp Set
pH
4.01
25.5°C
pH
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
Key Info
Scroll
Accept
EXIT
MENU
HOLD
CAL
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