7
B. pH Calibration
The 6010N uses 2-point calibration. The first point must be 6.86/7.00,
and the second point can either be 4.00/4.01 or 9.18
/ 10.01.
[
Note:
For accurate measurements, it is recommended that pH
calibration is preformed once a week and after replacing the
electrode. ]
a.
Calibration with an ATC/Temp probe in the pH-AUTOLOCK
mode.
1. Turn the unit on. Press “CLEAR” key for
5 seconds, all LCD
elements will lit up. The meter clears all calibration values
stored in the
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. “pH” icon and “AUTO” icon will lit up. The
“STAND” icon will flash.
3. Rinse the pH and ATC/Temp probes in distilled water and
immerse them in the first buffer solution (either 7.00 or 6.86).
Allow temperature reading to stabilize, 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 “SLOPE” icon will flash. The unit
is ready to be sloped at the second buffer.
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 “WAIT” icon will flash
until the unit detects a stable reading. Once the unit
calibrates the second point and the unit will automatically exit
the calibration mode. Dual point calibration is complete.
5. The unit calculates and compensates for the pH electrode
SLOPE deviation corresponding to the values of the two
calibration buffers. After calibration, press and hold
“MEA./EFF.” key for 5 seconds to display the new electrode
efficiency.
[
Note:
It is recommended to use a new electrode when the
efficiency value is over than 75%.]
