ECD L20, Инструкция по эксплуатации, Страница: 9 / 20

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reading. Once the unit calibrates the second point, the “SLOPE” icon
will flash. The unit is ready to be sloped at the third buffer.
[Note: At this moment, press the “Mode” key, to 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. The 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 light 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 light up. “pH” icon and “AUTO” icon light up. The buffer set
icon will 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 the “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.