relatively low cost, easy maintainance and their independence
from an external power supply (except that the clock drives
have to be wound up at regular intervals)
The variations overtime of the parameter to be measured are
displayed in graphical form on diagram chart. Generally,
these charts have an appropriate time unit imprint to
facilitate the analysis. As inmost cases this chart analysis
(the transfer of graphical "values" to numerical data) is
carried out manually and considerable "manpower" input has to
be considered this, however, depends on the type of record
and the details requested.
3.5 Electrical Recording Instruments
Electrical recording assemblies consist of a sensor orb bdetector component and the recording device. As electrical
signals can be transmitted over bigger distances without
major problems, such setups are particularly recommended
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