9
2. Connect the pH electrode to the BNC connector of the unit.
3. Press
“Mode”
key to go to pH-AUTOLOCK mode. “MAN” icon,
“pH” icon and “AUTO” icon will lit up. The "CAL" icon will begin
to flash.
4. Rinse the pH probes 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
℃
).
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 remains 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. Repeat steps 5 of “
Calibration with an ATC/Temp probe in
the pH-AUTOLOCK mode”
for 2 to 5 point calibration.
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.
c. Calibration with an ATC/Temp probe in the pH NON-
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.
2. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit.
3. Press
“Mode”
key for the LCD to display pH and the
AUTOLOCK annunciator is off. “ATC” icon will lit up, “pH” icon
is on. The "CAL" icon will begin to flash.
4. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution. Allow temperature
and pH reading to stabilize, 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 two other
selectable buffers start to flash. The unit is ready to be sloped
at the second buffer.
