Thermo Fisher Scientific pHTestr 10/20/30/10 BNC/Spear - Manual

INSTRUCTION MANUAL
pHTestr 10, 20, 30,
10BNC, Spear
Large Screen
Waterproof pH / Temperature Testr
Double Junction
This Instruction Manual is also available for download on our Web-site: eutechinst.com or 4oakton.com
Figure 5: User Reset Sequence
With meter powered
off, press CAL and
ON/OFF at the same
time. First release
ON/OFF button,
then CAL button. After reset, whole
LCD segment lits up
and goes back to
measurement mode.
Figure 4: Example of HOLD Function
pH Measurement
1 . Press the ON/OFF button to switch the Testr on.
2. Dip the electrode about 2 to 3 cm into the test solution. Stir and let the reading
stabilize. For semi-solid samples using pHSpear, rotation is ideal for sample contact.
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 pH value or press HOLD/ENT button to freeze the reading. To release the
reading, press HOLD/ENT again.
4. Press ON/OFF to turn off Testr. If you do not press a button for 8.5 minutes, the Testr
will automatically shut off to conserve batteries.
HOLD Function
This feature lets you freeze the display for a delayed observation
1. Press HOLD/ENT button to freeze the measurement. A ‘HOLD’ indicator will be
displayed and the measurement will be frozen.
2. Press HOLD/ENT again to release the measurement. The ‘HOLD’ indicator will not be
displayed anymore indicating the held measurement is released.
Introduction
Thank you for selecting our waterproof pH Testr. This manual serves the following
(5) models:
• pHTestr 10 (Eutech PHTEST10 / 01X366901 / Oakton 35634-10)
• pHTestr 20 (Eutech PHTEST20 / 01X366902 / Oakton 35634-20)
• pHTestr 30 (Eutech PHTEST30 / 01X366903 / Oakton 35634-30)
• pHTestr 10BNC (Eutech PHTEST10BNC / 01X366904 / Oakton 35634-14)
• pH Spear (Eutech PHSPEAR / 01X366920 / Oakton 35634-40)
This manual provides a step-by-step guide to operate the Testrs.
Before You Begin
Your instrument has been factory calibrated and usually works well out of the box. However,
after extended periods of non-use, it’s best to soak the sensor in electrode storage solution, pH
buffer for 10 minutes or so. A brief rinse with deionized (DI) water is OK, but avoid soaking or
storing in deionized water as this will shorten the pH electrode life. Prior to taking measurements,
periodic calibration with certified standards is recommended for best accuracy.
Note: For pHTestr10BNC, please refer to the pH electrode’s instruction manual.
pH Buffer Set Selection
Your Testr 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. While pressing the HOLD/ENT button, switch on the Testr by pressing the
ON/OFF button.
2. Release the HOLD/ENT button. The display will flash either USA or NIST.
3. Press CAL button to toggle between the two buffer set standards.
4. Press the HOLD/ENT button to confirm the selection of the buffer set.
With meter powered
off, press HOLD/ENT
and ON/OFF at the
same time. First
release ON/OFF
button, then HOLD/
ENT button. After buffer
selection, whole
LCD segment lits
up and goes back
to measurement
mode.
Figure 1: Buffer Selection Sequence
3. Press the CAL button to enter calibration mode. The ‘CAL’ indicator will be shown.
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: All Testrs have dual display during calibration mode.
Note: To abort calibration, press the ‘CAL’ button.
4. Allow about 2 minutes for the Testr reading to stabilize before pressing the HOLD/ENT
button to confirm the first calibration point. The upper display will be calibrated to the
pH standard buffer solution and the lower display will then search for the next 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 before
returning to the measurement mode automatically. However, if you opted to have only
one or two calibration points, simply skip the remaining calibration points by exiting to
the measurement mode by pressing the CAL button.
To do a 1 point calibration
only, press CAL button at this
point to exit to the
measurement mode.
Otherwise, proceed to second
buffer for a second buffer for
a second point calibration.
To do a 2 point calibration only, press
CAL button at this point to exit to the
measurement mode. Otherwise,
proceed to third buffer for a third
buffer for a third point calibration.
After the third point calibration, the meter will
automatically return to the measurement mode.
At any point, an error message ‘Er. 1’ will be
displayed momentarily if the confirmed pH
value is not within the pH calibration window.
Figure 2: Example of pH Calibration Sequence
ATC - Automatic Temperature Compensation
(Only for pHTestr 10, pHTestr 20 and pHTestr 30)
Through its in-built temperature sensor, the measurement error due to the changes in electrode
sensitivity due to changes in temperature is compensated to give the actual pH reading of
the sample measured.
MTC - Manual Temperature Compensation
(Only for pHTestr 10BNC, pH Spear)
The MTC range is 0 to 50.0 °C (32.0 to122.0 °F). User reset will set temperature to default
value 25°C or 77°F.
While in the measurement mode,
1. Press the HOLD/ENT button to bring the Testr to the ‘HOLD’ mode.
2. Press the CAL button continuously to switch to the °C or °F mode setting
selection screen.
3. Release the CAL button to confirm your mode selection and the display will go to the
manual temperature calibration mode with the upper display flashing. The upper
display shows the adjustable temperature value and the lower display shows the last
set temperature offset.
4. Press the HOLD/ENT button to set the upper display to the temperature value of
your sample.
5. Once the setting is reached, release the HOLD/ENT button. The new value is
automatically confirmed and returns to the measurement mode if no button is pressed
after 5 seconds.
Notes: To exit this program without confirming the calibration, press the CAL button before the
automatic confirmation takes place.
pH Calibration
Calibration should be done regularly, preferably once a week. You can calibrate up to three
points using either the USA or the NIST buffer set standards.
1. Press ON/OFF button to switch unit on.
2. Dip electrode about 2 to 3 cm into the pH standard buffer solution.
User Reset
You can reset the pH calibration to the factory default by using the user reset function.
Buffer set selection and temperature user calibration (pHTestr30) are not affected by the
user reset function.
1. Switch off the Testr.
2. While pressing the ‘CAL’ button, press and release the ON/OFF button to enter the
‘User Reset’ selection menu. The screen will display ‘rSt’ on the bottom display with
a flashing ‘nO’ selection.
3. Use the ‘CAL’ button to toggle between ‘nO’ and ‘YES’ selection.
• nO deactivates reset selection
• YES activates the reset selection
4. Press the HOLD/ENT button to confirm the selection made.
5. If you have selected ‘YES’, the unit will show ‘CO’ momentarily and proceed to the
measurement mode with the calibration reset back to factory default value.
6. If ‘nO’ is selected, the unit will proceed to the measurement mode without any
calibration reset performed.
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