Operating Principle - palintest PAASense Manuel D'utilisation

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4
Drag and drop the software upgrade (.PLE) file onto
the hard drive window.
5
The new software will be programmed into the
PAASense. The instrument will restart to run the new
software
6
When upgrading the .PLE file, the instrument should be
turned off and then back on again, for the new software
to take effect.
7
Any logged data will be retained during this upgrade.

Operating Principle

The PAASense uses the electrochemical technique
known as chronoamperometry.
Chronoamperometry involves applying a fixed voltage
to a working electrode and recording the resulting
current-time dependence. The magnitude of the
current is directly proportional to the concentration of
chlorine in the test sample.
PAA sensors have two working electrodes, each
tuned to measure a different ranges of peroxyacetic
acid. The PAASense reads the signal from both
electrodes and selects the best result to display.
Once the sensor is inserted, The PAASense precisely
controls the electrode voltages while capturing and
collating thousands of current measurements. The
processor interprets these readings to deliver the
Peroxyacetic Acid concentration. The instrument
displays the test result in mg/L.
No user calibration is required, because each
sensor batch is assigned a calibration code during
manufacture. This code is used to construct a
calibration curve that matches the sensor batch. A
pre-programmed, plug-in calibration chip is provided
with each pack of sensors to automatically enter the
calibration code into the instrument.
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