This section supports the contention that adequate and even extensive
instrumentation of a refrigeration facility can enhance efficiency, reliability,
and safety. Future sections will focus on electronic and computer monitoring
and control, but this section allows for low technology exemplified by visual
indicators such as pressure gauges and thermometers. The refrigeration plant
of several decades ago was typically equipped with an instrument panel with
some large pressure gauges, pilot lights, cutouts, alarms, and sometimes even
switchboxes. Through the years, the instrument panel has virtually disappeared,
and pressure gauges, for example, are often only small gauges mounted on the
compressor package.
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