c. Calibration with an ATC/Temp probe in the pH NON-
AUTOLOCK mode.
1. Turn the unit on. Press “Clear” key for 2 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:
“ATC” icon will lit up. Press “Mode” key to select “pH” mode.
“pH” icon is on. One of the buffer in the pre-selected buffer set
will start to flash.
3. 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 5
seconds to calibrate, the unit immediately calibrates the first
point, the selected buffer remains lit up while the remaining
two 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, 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 4.00, 4.01, 9.18 or 10.00, at this
moment, the unit will automatically exit the calibration mode.
Single point calibration is complete.]
4. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the second buffer solution (either 4.00/4.01
or 9.18/10.01). Allow temperature reading to stabilize, then
press “Slope” key to calibrate. The unit immediately calibrates
the second point, the other buffer solution will 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.]
5. Rinse the pH and ATC/Temp probe in distilled water and
immerse them in the third buffer solution (either 9.18/10.01 or
4.00/4.01). Allow temperature reading to stabilize, then press
“Slope” key to calibrate. The unit immediately calibrates the
third point and the unit will automatically exit the calibration
mode. Three points calibration is complete.
6. The unit calculates and compensates for the pH electrode
slope deviation corresponding to the values of the three
calibration buffers. After calibration, press and hold “Mea./Eff.”
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