key for about 5 seconds to display the new electrode efficiency.
d. Calibration with manual temperature compensation 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 of the unit,
“MAN” 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 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℃) before
pressing “Stand” key. 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 immediately exit the calibration mode.
Single point calibration is complete.]
4. Repeat steps 4~6 of “Calibration with an ATC/Temp probe in
the pH NON- AUTOLOCK mode” for dual and three point
calibration.
C. pH Measurements
To take pH measurements, the pre-selected buffer solution set must
lit up, indicating the unit is Single point or dual-point or three-point
calibrated and ready for measurements. If buffer solution set
flashes, perform a pH calibration before taking measurements.
a. Measurement with an ATC/Temp probe in the pH-
AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit. The
“ATC” icon will lit up.
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