STANDARD CALIBRATION
The meter should be calibrated regularly with
standard USA, NIST or DIN buffers to ensure
accuracy. If the meter is used frequently, daily
calibration is recommended.
Voltage Range for Each Calibration Point
pH 4 00
97 mV to 250 mV
pH 7 00
-60 mV to 60 mV
pH 10 00
-250 mV to -97 mV
Calibration Procedure
1 Press
POWER
button to turn the meter
on
2. Pour the pH buffer into a clean container
and place the electrode into the buffer. We
recommend starting with a middle range
buffer such as pH 7. Make sure the electrode is
completely immersed in the buffer.
3 Press
CAL
to enter Calibration Mode.
“CAL” displays for one second, followed by the
pH value. Models SP-850063 / 65 / 66 / 67 also
display the temperature.
CALATC
F
5
