8
3.
Press
“Mode”
key to go to pH-AUTOLOCK mode. “ATC” icon,
“pH” icon and “AUTO” icon will lit up. The "CAL" icon begins
to flash.
4.
Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution. Allow temperature
reading to stabilize, then press and hold
“Stand”
key for 2
seconds to calibrate. The “WAIT” icon will flash until the unit
detects a stable reading. Once the unit calibrates the first
point, the selected buffer will lit up while two other selectable
buffers start to flash. The unit is ready to be sloped at the
second buffer.
[
Note:
If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the
“Mode”
key. The unit will exit the
calibration mode. Single point calibration is complete.
If the first buffer solution is 1.68, 4.00, 4.01, 9.18 , 10.01 or
12.46 pH, at this moment, the unit will automatically exit the
calibration mode. Single point calibration is complete.]
5.
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/Enter”
key to calibrate. The “WAIT” 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.]
6.
The third point, the fourth point and the fifth point are the
same as the second calibration point. When the unit
completed the fifth point calibration, press the
“Mode”
key
and exit calibration.
7.
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. In pH mode, press
“Clear”
key for 5 seconds,
all LCD elements will lit up. The meter clears all calibration
values stored in internal memory.
