[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 “WAIT” icon will flash
until the unit detects a stable reading. Once the unit
calibrates the third point and the unit will automatically exit
the calibration mode. Three point 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.” key for about 5 seconds to display the new electrode
efficiency.
b. Calibration with manual temperature compensation in the
pH-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 of the unit,
“MAN” icon will lit up. “pH” icon and “AUTO” icon will lit up.
One of the buffer in the pre-selected buffer set will start to
flash.
3. 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 5 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 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. Repeat steps 4~6 of “Calibration with an ATC/Temp probe in
the pH-AUTOLOCK mode” for dual and three point calibration.
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