8
Single point calibration is complete.]
4. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the second buffer solution (either 4.00 /
4.01 pH or 9.18 / 10.01 pH corresponding to the flashing
number on display). Allow temperature reading to stabilize,
then press
“Slope”
key to calibrate. The “ ” icon will flash
until the unit detects a stable reading. Once the unit
calibrates the second point, the selected two buffers lit up
and the remaining buffer starts to flash. The unit is ready to
be sloped at the third buffer.
[
Note:
At this moment, press the
“Mode”
key, the unit will
exit the calibration mode. Dual point calibration is complete.]
5. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the third buffer solution (either 4.00/4.01 pH
or 9.18/10.01 pH corresponding to the flashing number on
display). Allow temperature reading to stabilize, then press
“Slope”
key to calibrate. The “ ” icon will flash until the unit
detects a stable reading. Once the unit calibrates the third
point and the unit will automatically exit the calibration mode.
Three point calibration is complete.
6. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the calibrated
buffers. After calibration, press and hold
“Mea./Eff.”
key for
about 5 seconds to display the new electrode efficiency and
offset.
b. Calibration with manual temperature compensation in the
pH-AUTOLOCK mode.
1. Turn the unit on. Press
“Clear/Enter”
key for 5 seconds, all
LCD elements will lit up. The meter clears all calibration values
stored in internal memory.
2. Connect the pH electrode to the BNC connector of the unit,
“MAN” icon will lit up. “pH” icon and “AUTO” icon will lit up. The
“buffer” icon will flash.
3. Rinse the pH probes in distilled water and immerse it in the
first buffer solution (either 7.00 or 6.86 pH). Adjust the
temperature reading to that of the first buffer using the
“Up”
or
“Down”
keys (0.0 to 60.0
℃
) before pressing
“Stand”
key.
Then press and hold
“Stand”
key for 2 seconds to calibrate.
The “ ” icon will flash until the unit detects a stable reading.
Once the unit calibrates the first point, the “4.00
（
4.01
）
” and
