7.1 General
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
46
￭￭￭￭￭￭￭￭
7 Troubleshooting
7.1 General
If you experience problems during measurements, then you can search for
the cause in the following places:
Application Difficult sample matrices or interfering influences may render accurate
measurements impossible (e.g. insufficient ionic strength, presence of
interfering ions, etc.).
Metrohm will support you in choosing the appropriate analysis conditions
and configuring the device method with Application Bulletins and
Application Notes.
Buffer solutions /
standard solutions
The precision of the measurements mainly depends on the correct calibra-
tion of the sensors. To do so, you should use clean and fresh buffer solu-
tions or standard solutions.
A common cause of incorrect calibrations is, for example, the use of an
old pH 10 or pH 12 buffer. The pH value of an old buffer may markedly
deviate from the certified pH value of a new buffer as a result of the intro-
duction of CO
2
from the air.
Sensors The sensors are the most important component in the entire measuring
system.
Please read the corresponding leaflets on how to handle sensors correctly.
Device If the 949 pH Meter may possibly be the cause of a measuring problem,
then start by checking all configuration settings and parameter settings.
The 949 pH Meter will use appropriate messages to notify you directly of
problems during operation.
You can find an explanation of these messages in the Messages chapter
(see chapter 7.3, page 48).
To Next Page
Loading...
