Metrohm 780 - 7 Various Functions; Calibration and Addition;Subtraction Data; Ph Calibration Data

7 Various functions
780/781 pH/Ion Meter, Manual
85
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).