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3 Pour pH buffer calibration standard solution into a clean, dry container
and dip your pH electrode and temperature probe in the solution. Swirl
gently or stir and wait for reading to stabilise (approx. 30 seconds
depending on your electrode condition).
4 When the pH reading has stabilised, the pH annunciator will stop
blinking. Press HOLD/ENTER to confirm the value. "CO" (confirm) will
display briefly. The pH value is automatically adjusted to the buffer value
shown from your selected buffer group. The example below shows a
successful pH 7.00 calibration at 25°C.
5 For a one-point calibration with pH 7.00 only, press
CAL to return to measurement mode. However
for highest accuracy - perform a multiple-point
calibration. Repeat steps 3 & 4 with additional pH
buffer calibration standards. When you have completed the preset number
of calibration points, the meter will automatically save the calibration,
cease blinking, and begin pH measurement.
Q: My meter, electrode & buffers are new - why does my pH 10 buffer read "10.06"?
A: Temperature influences pH. While pH 10 buffer is 10.00 at 25°C / 77°F,
at 20°C / 68°F it is actually 10.06! This is why it is always best to record
the temperature as well as the pH reading!
Resetting User Calibrated Values
The meter can be completely reset to factory default values, or partially reset
for calibration values only using the procedure below.
Reset Type
No (nO)
Calibration (CAL)
Factory (FCt)
*For calibration reset, measure in the mode that you want to reset prior to step 1 below.
Description
No reset is performed; meter returns to measurement
Reset of either pH, mV, or Temperature
calibration depending on the selected mode*
Reset of all calibration values and user
settings to factory default settings
Calibration
3
9
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