Glossary - Honeywell APT4000PH User Manual

Glossary

The voltage which a pH electrode provides
Asymmetry
at a pH of 7. The asymmetry potential is
potential
different for each electrode and changes
with age and wear.
Buffer set Contains selected buffer solutions which
can be used for automatic calibration with
the Calimatic. The buffer set must be
selected prior to the first calibration.
Buffer solu-
Solution with an exactly defined pH value
tion for calibrating a pH meter.
Calibration Adjustment of the pH meter to the current
electrode characteristics. The asymmetry
potential and slope are adjusted.
You can conduct either a one or a two-
point calibration. With one-point calibra-
tion only the asymmetry potential (zero
point) is adjusted.
Automatic buffer recognition. Before the
Calimatic
first calibration, the buffer set used must
be activated once. The patented Calimatic
then automatically recognizes the buffer
solutions used during calibration.
Combination of glass and reference elec-
Combination
trode in one body.
electrode
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DURAFET
DURAFET
cap adapter
Electrode
slope
Electrode
zero point
GainCheck
APT4000PH
DURAFET combination pH/ORP electrodes
consist of an ISFET measuring electrode, a
reference electrode, and a temperature
probe.
Adapter integrated in the protective cap of
the DURAFET electrode. Here, the signal of
the pH-sensitive FET is converted to volt-
age corresponding to the signal of a glass
electrode. This voltage is led to the pH
input of the analyzer and is processed fur-
ther as usual. The adapter is directly sup-
plied from the analyzer.
Is indicated in % of the theoretical slope
(59.2 mV/pH at 25 °C). The electrode
slope is different for every electrode and
changes with age and wear.
See asymmetry potential
Device self-test which runs automatically in
the background at fixed intervals. The
memory and measured-value transmission
are checked. You can also start the
GainCheck manually. Then a display test is
also conducted and the software version
displayed.
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