Thermo Fisher Scientific Eutech pH 700/Ion 700 - Manual (Page 8)

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4) To calibrate another buffer repeat step 3) or press to return to the
measurement mode. Note: The meter will automatically return to
measurement mode upon successful completion of the number of
specified calibration points. To specify a different number of pH
calibration points see Section 5.6.
Additional notes:
A single point (offset) calibration is only allowed with pH 7.00 or
pH 6.86 buffers.
When the first calibration value is accepted during a new calibration,
all prior calibration values are erased.
Press
at any time to abort calibration and return to measurement
mode.
3.2 Temperature Calibration
The thermistor sensor used for automatic temperature compensation and
measurement is both accurate and stable, so require frequent calibration
isn’t required. Temperature calibration is recommended upon electrode
replacement, whenever the temperature reading is suspect, or if matching
against a certified thermometer is desired.
1) Connect the temperature probe to the meter and place into a solution
with a known accurate temperature such as a constant temperature
bath. Note: To adjust the manual temperature compensation (MTC)
value, do not connect the temperature probe.
2) Press as needed to select pH or mV/R.mV.
3) Press followed by . The primary display shows the
measured temperature while the secondary display shows the factory
default temperature.
4) Adjust the temperature using or . Press to accept or
to cancel. The meter allows an adjustable maximum value of ± 5ºC
(or ± 9ºF) from the factory default temperature.