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4. Repeat steps 4 to 5 of “
Calibration with an ATC/Temp probe
in the pH NON- AUTOLOCK mode”
for dual and three point
calibration.
5. 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.
C. pH Measurements
To take pH measurements, 6011M/6011EU must be calibrated
before first use.
a. Measurement with an ATC/Temp probe in the pH-
AUTOLOCK mode.
1.
Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit. The
“ATC” icon will lit up.
2.
Press
“Mode”
key until “pH”, “AUTO”, “ATC”, “buffer” “ ”
icons lit up.
3.
Rinse the pH electrode and ATC/temp probe with distilled
water and immerse them in the sample to be measured.
Remove any air bubbles trapped around the probe by shaking
or stirring the probe.
4.
Press the
“Mea./Eff.”
key. The “ ” icon will start flashing. The
unit is waiting for a stable reading. The display will track the pH
value as sensed by the pH electrode and the ATC/Temp
probe.
5.
When the “ ” icon disappears, the reading is then “√” and will
not respond to further changes from the sample. The pH value
shown is the pH value of the sample at the displayed sample
temperature.
[
Note:
For samples that are inherently unstable, the unit will
not AUTOLOCK. In this case, use the pH NON- AUTOLOCK
mode for measurements.]
b. Measurement with manual temperature compensation in
the pH-AUTOLOCK mode.
1.
Connect the pH electrode to the BNC connector of the unit.
The “MAN” icon will lit up. Set unit to display the sample
