Metrohm 781 pH/Ion Meter - Manual (Page 99)

7 Various functions
780/781 pH/Ion Meter, Manual
89
7.1.2 Conc calibration data (781 pH/Ion Meter only)
CAL.DATA
7
CAL.DATA
├
ion type
├
electr.Id
├
method
├
slope
├
E(0)
├
c(blank)
├
temperature
├
temp.sensor
├
c.dat.
├
cal.interval
├
variance
├
no.of standards
├
cal.table
├
st1
├
st2
:
├
stn
└
curve
ion type
The analyte ion which has been defined during the calibration under
PARAMETER Conc/ion parameters is shown here. As with the follow-
ing electrode Id, the current calibration data changes as the ion param-
eter changes.
electr.id
If an electrode Id has been entered or selected before the calibration
under PARAMETERS Conc/measuring parameters/electr.id then it
will be shown here. Electrode Ids can be defined for a particular type of
ion. The calibration data will apply to this electrode only and will change
when a new electrode Id is set under the above measuring parameters
(see Section 6.5.5).
method
The calibration parameters set under
PARAMETER Conc/calibration
parameters form part of the method parameters. The appropriate
method name will be shown here when the calibration data have been
determined using this method and the resulting quantities slope , E(0)
and c(blank) have not been altered since. If no method name has
been assigned before the calibration (see Section 6.1), then ' ******** '
will appear here.
slope
The slope of the calibration function obtained during the calibration will
be shown here in mV. With no calibration this will be set to the theoreti-
cal value of +59.2 mV or -59.2 mV per ion charge at 25 °C.
This value can be altered manually for test purposes. However, after-
wards the information about the method will be missing from the list