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6 Calibration of the pH combination electrode
Calibration point 3
6.4
Calibration without temperature probe
6.4.1 Calibration with standard buffer series, example using technical
buffer series
Calibration point 1
Insert the combination electrode and the temperature probe into the third
buffer solution and gently stir.
Press the
key when the measured value is stable (small triangle
appears on the display above the yellow "ok" label).
Finally, the condition of the combination electrode is briefly displayed and then
the 3 point calibration is completed and the device returns to measurement
mode.
Press the
key for at least 2 seconds to start the calibration.
Insert the combination electrode into the first buffer solution and gently stir.
NOTE!
If the 2 or 3 point calibration has been selected as the calibration method,
the device expects a neutral buffer solution within the range pH 6.5 to pH 7.5
for the first calibration point.
The device automatically detects the buffer solutions of the technical buffer
series and the DIN buffer series.
If the 1 point calibration has been selected as the calibration method, any
buffer solution can be employed (so, for example, also pH 4 or pH 10 when
selecting a technical buffer series).
rH
mV
mV
pH
H
ATC
ok
CAL
AL Logg
pH
rH
mV
mV
pH
H
ATC
ok
CAL
AL Logg
pH
Use the
and
solution and then save by pressing the
The value "7.0" appears on the main display of the
device, "Pt.1" and a revolving symbol appear on the
subsidiary display of the device.
If the measured pH value is outside of the acceptable
range, the value "7.0" flashes.
If the measured pH value is within the acceptable
range and is stable, the device saves the value auto-
matically for calibration point 1.
The display changes so that the temperature value
(t.1) for the first buffer solution can be entered.
keys to set the temperature value for the first buffer
key.
25
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