Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 272)

4.7 Calibrating pH electrodes (CAL pH) and ISE (CAL Conc)
260
PC Control / Touch Control
(Switch on stirrer) The stirrer will be switched on if Stir solution
during measurement is activated.
Measure buffer 1 The potential of buffer 1 is measured.
(Switch off stirrer) The stirrer will be switched off if the buffer has
been recognized and if Stir solution during
measurement is activated.
Message showing
which buffer has
been recognized.
A message will be shown with instructions for the
next buffer. When the electrode has been im-
mersed in the second buffer the second meas-
urement is started with [OK].
(Stir and/or
pause before
measurement)
The solution is stirred before the measurement.
Pause will be allowed to elapse before the meas-
urement.
(Switch on stirrer) The stirrer will be switched on if Stir solution
during measurement is activated.
Measure buffer 2 The potential of buffer 2 is measured.
(Switch off stirrer) The stirrer will be switched off if the buffer has
been recognized and if Stir solution during
measurement is activated.
Calculate calibra-
tion data
The calibration data, i.e. the slope and the elec-
trode zero point pH(0) are calculated, the limits
checked and, if necessary, an appropriate mes-
sage displayed. The calibration data will be added
to the sensor data for the particular sensor.
Optional steps are shown in brackets.