Metrohm 827 pH lab - Manual (Page 38)

6.1 pH measurement (pH mode)
30
826/827 pH meter, Instructions for Use
6.1.2 Calibration parameters
param
:
├
cal.settings
: ├
temperature
├
report
├
cal.interval
├
no.of buffers
└
buff.type
The calibration parameters describe the most important settings for the
calibration such as buffer types and number of buffers.
temperature 0.0...25.0...99.9 °C
Just as for the measuring temperature, the calibration temperature
should also be entered when no temperature sensor is connected.
Otherwise the temperature is measured continuously and this value will
be ignored. If the measuring and calibration temperatures are different,
then this is absolutely necessary for the automatic temperature correc-
tion of the electrode slope. The temperature is also stored with the suf-
fix 'manual' and marked in this way in the calibration report.
The exact temperature recording is also important for the pH calibration
as the pH meter works with automatic buffer recognition (see below:
buff.type).
report: on, off
After the calibration it is possible to output the calibration data automat-
ically as a report.
Such a report can also be printed out at a later date.
cal.interval 0...999 h, 0 = off
The pH meter can automatically remind you about any recalibration of
the pH electrode used. When this interval has elapsed, a message will
appear on the display:
cal.interval exp.
This message can be deleted from the display with <QUIT>. It is dis-
played again every 10 min until a new calibration has been carried out.
Until then it will be printed out on every measuring point report.
Note!
The calibration interval is only valid after the next calibration.