Metrohm 781 pH/Ion Meter - Manual (Page 95)

7 Various functions
780/781 pH/Ion Meter, Manual
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7 Various functions
This section describes various functions of the pH/Ion Meter which can-
not be assigned to individual modes.
7.1 Calibration and addition/subtraction data
The current pH calibration data can be called up at any time with the
<CAL.DATA> key. For the 781 pH/Ion Meter the same applies to the
concentration calibration (<CAL.DATA>) and the addition or subtrac-
tion data (<ADD.DATA>) in the Conc mode.
A detailed description of the evaluation of the calibration and addi-
tion/subtraction measurements for the calculation of this data can be
found in Section 9.2.
An overview appears which, depending on the measuring mode and
calibration data, can have a different composition.
For example, if no calibration has yet been carried out for a new elec-
trode Id then only the theoretical calibration data slope = 100.00% and
pH(0) = 7.000 will be shown and taken into account for the measure-
ment.
7.1.1 pH calibration data
CAL.DATA
7
CAL.DATA
├
electr.id
├
method
├
slope
├
pH(0)
├
temperature
├
temp.sensor
├
c.dat.
├
cal.interval
├
variance
├
buffer type
├
no.of buffers
├
cal.table
├
b1
├
b2
:
├
bn
└
curve
electr.id
If an electrode Id has been selected or entered under
PARAMETER pH/
measuring parameters/electr.id before the calibration then it will
be shown here. The calibration data apply only to this electrode and will
change when a new electrode Id is set under the above measuring pa-
rameters (see Section 6.2.2).