10
flashing number on display). Allow temperature reading to
stabilize, then press
“Slope/Enter”
key to calibrate. The
unit immediately 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.]
f. The procedure to calibrate the third point, the fourth point
and the fifth point are the same as the second point
calibration. When the unit completed the fifth calibration
point, press the
“Mode”
key and exit calibration mode.
g. 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 value.
4. Calibration with manual temperature compensation in the
pH NON-AUTOLOCK mode.
a. Turn the unit on. In pH-NON-AUTOLOCK mode, press
“Set/Clear”
key for 5 seconds, all LCD elements will lit up.
The meter clears all calibration values stored in internal
memory.
b. Connect the pH electrode to the BNC connector of the
unit.
c. Press
“Mode”
key for the LCD to display pH and the
AUTOLOCK annunciator is off. “MAN” icon will lit up, “pH”
icon is on. The "CAL" icon will begin to flash.
d. Rinse the pH electrode in distilled water and immerse it in
the first buffer solution. Adjust the temperature reading to
that of the first buffer using the
“
Up”
or
“Down”
key (0.0 to
60.0
℃
) before pressing
“Stand”
key. Then press and
hold
“Stand”
key for 2 seconds to calibrate. The unit
immediately calibrates the first point. The selected buffer
remains lit up while the remaining buffers start to flash.
The unit is ready to be sloped at the second buffer if the
first buffer solution is 6.86 or 7.00 pH.
[
Note:
At this moment, press the
“Mode”
key, the unit will
exit the calibration mode. Single point calibration is
complete.
To continue with two or more point calibration, the first
buffer solution has to be either 7.00 or 6.86 pH.]
