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DOC_IPA_CONTROL_EXACT_ENG_20190122
1. Field of Application
This device serves to control the isopropyl alcohol concentration in
the dampening solution from offset printing presses. The measure-
ment is made by hand externally from the dampening solution
preparation system. Temperature compensation calculations are
not necessary. With the help of the heatable measuring dish, the
dampening solution is tempered before every measurement which
assures a high measurement accuracy.
The dampening solution can be taken from any point in the
dampening solution circulation of the printing press.
2. Operating Principle
The IPA CONTROL EXACT measuring device operates based on the
principle of gas extraction with a subsequent gas analysis.
A dampening solution sample is taken from the printing press and
is poured in the measuring dish. Then, the measuring head of the
hand-held device is placed in the measuring dish so that the
resulting IPA-air mixture above the dampening solution is chan-
nelled to the gas sensor.
This sensor determines the isopropyl alcohol content of the gas.
The IPA concentration in the dampening solution is calculated
based on the measured liquid temperature and the sensor signal.
