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pH Calibration
Calibration should be done regularly, preferably once a week or more if using the tester daily. You can calibrate up to
three points using standards from either the USA or the NIST buffer groups. For best results, use a minimum of two
pH buffers such as pH 4 and pH 7.
1. Press
to power the tester on if needed.
2. Dip sensor in about 2 cm to 3 cm into the pH standard buffer solution. If using the supplied cap, fill to the "MAX"
line. For best results, allow the reading to stabilize if needed before proceeding.
3. Press the
to enter calibration mode. The CAL indicator will be displayed. The upper display will show the
unadjusted factory default reading while the lower display will search for the corresponding value from the
selected buffer group.
Note: All testers have dual display during calibration mode. To abort calibration, press
4. The timer icon will blink while the reading stabilizes (allow 1 to 2 minutes). Once the reading is stabilized, the timer
stops blinking. The tester will automatically confirm the calibration value and return to the measurement window
when successful.
5. Rinse electrode and repeat with other buffers if necessary.
CAL
Place the tester
in the buffer to
start or press
to escape.
Measurement
1. Press
to power the tester on if needed.
2. Dip the sensor in about 2 cm to 3 cm into the sample. If using the supplied cap, fill to the "MAX" line. Stir and let
the reading stabilize. The timer icon will blink during this time. Once the reading is stable,
CAUTION: Testing dry samples is not recommended and can lead to sensor damage.
Soils must be wet and free from particulates that may scratch the glass
sensor. Excessive force into dry samples can cause glass breakage.
3. Note the pH value or press
4. Press
for 3 seconds to turn off. If you do not press a button for 8.5 minutes, the tester will automatically shut
off to conserve batteries.
User Reset
You can reset the pH calibration to the user's default settings by using the user reset function. Buffer selection and
temperature user calibration are not affected by the user reset function.
1. Press
to enter setup window. Scroll down by pressing
display shows User Reset and Fact Reset.
2. Press
to select User Reset. The display automatically shows No and Yes.
3. Scroll down by pressing
4. Press
to confirm either No or Yes. The display shows the user reset option with a
Key Info
Scroll
Accept
EXIT
4
CAL
pH
7.45
7.01
to freeze the reading. To release the reading, press
to toggle between No and Yes.
Settings
User Reset
Temp Set
Fact Reset
Reset
pH
pH
7.01
25.5°C
to select Reset. Press
No
Yes
Elite pH and pH Spear Tester Operating Instructions
.
will appear.
pH
pH
4.01
25.5°C
again.
to select Reset. The
.
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