12
electrode efficiency and offset value.
4. Calibration with manual temperature compensation in the
pH NON-AUTOLOCK mode.
a. Turn the unit on. In the pH mode, press
“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”
keys (0.0
to 60.0
℃
) before pressing
“Stand/Cal”
key. Then press
and hold
“Stand/Cal”
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.]
e. Repeat steps 5 of “
Calibration with an ATC/Temp probe in
the pH NON-AUTOLOCK mode”
for 2 to 5 points
calibration.
f. 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.
C. pH Measurements
To take pH measurements, 6377MB/6377BEU must be
calibrated before first use.
1. Measurement with an ATC/Temp probe in the
pH-AUTOLOCK mode.
a. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit.
