Operating Instructions
CTSTestr
™
50 Pocket Testers
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 TDS Factor and Backlight.
3. Scroll down by pressing MENU/
v
to toggle between 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 .
Temp Coefficient
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.
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 .
Settings
Temp Set
Reset
TDS
Salinity
hold
menu
Cond
hold
Measure
Cond
Measure
Settings
Temp Set
Reset
Backlight
hold
Adjust
TDS Factor
0.71
0.66
hold
TDS Factor
hold
menu
Measure
Settings
Temp Set
Reset
TDS Factor
hold
Backlight
ON
OFF
hold
Backlight
OFF
hold
menu
Measure
Settings
Reset
Temp Cal
Temp Coeff
hold
°C
°F
menu
°C
hold
Temp Set
Set °C/°F
hold
Measure
Settings
Reset
Set °C/°F
Temp Coeff
hold
Temp Cal
23.4 °C
23.4 °C
menu
23.4°C
hold
Temp Set
Temp Cal
hold
Measure
Settings
Reset
Set °C/°F
Temp Cal
hold
Adjust
Temp Coeff
2.00
menu
2.00
hold
Temp Set
Temp Coeff
hold
CAL
μS/cm
844
1413
Place the tester in
the calibration STD
to start or press
to escape.
cal
esc
cal
esc
COND
μS/cm
844
23.5 °C
CAL
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 .
Getting Started
The CTSTestr 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 callibaration with certified standards is
recommended for best accuracy.
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 Cond, TDS and Salinity.
3. Scroll down by pressing MENU/
v
to toggle between Cond, TDS and Salinity.
Press HOLD/
to select Cond.
4. The display shows the selected measure 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 TDS factor and
Backlight.
3. Press HOLD/
to select the default TDS factory setting or MENU/
v
to adjust
the setting.
4. Press HOLD/
to confirm the selection of the setting. The display shows the
set TDS factor 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.
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 key 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 automatically 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.
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.
CTS Measurement
1. Press ON/OFF ( ) to power the tester on if needed.
2. Dip the electrode 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 CTS 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 key is not pressed for 8.5 minutes,
the tester will automatically shut off to conserve batteries.
CAL
μS/cm
844
1413
CAL
Place the tester in
the calibration STD to
start or press
cal
esc
to
escape.
cal
esc
CAL
μS/cm
844
820
COND
μS/cm
844
24.8 °C
COND
μs/cm
820
24.8 °C
•
Aquaculture
• Aquariums
• Aquariums and fish farms
•
Boiler blow-down
•
Drinking water
•
Hydroponics
Applications
•
Electroplating rinse tanks
•
Printing industry
•
Swimming pools
•
Verification of reverse osmosis
system operation
•
Water & wastewater treatment
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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