cleaned as soon as use is discontinued so
that immediate reuse is possible.
●Improved safety. Workers are not required
to enter vessels that are cleaned with CIP
equipment. The risk of accidents from
slippery internal surfaces is eliminated.
The disadvantages of CIP systems are:
●Cost. Because most CIP systems are
custom designed, design and installa-
tion costs add to the high price of the
equipment.
●Maintenance. More sophisticated equip-
ment and systems tend to require more
maintenance.
●Inflexibility. These cleaning systems can
effectively clean in only those areas
where equipment is installed, whereas
portable cleaning equipment can cover
more area. Heavily soiled equipment is
not as effectively cleaned by CIP sys-
tems, and it is difficult to design units
that can clean all processing equipment.Microprocessor Control Unit
It is now possible to control CIP equip-
ment more precisely. More advanced elec-
tronic equipment, documents a CIP cycle
with temperature, cleaning compound con-
centration, and velocity of cleaning solution,
all plotted against time. Monitoring systems,
interfaced with CIP controllers, permit
tracking of cleaning parameters to provide
for troubleshooting and process control.
Improved product protection, labor and cost
reduction, and improved efficiency may be
achieved.
Sophisticated equipment that documents
a CIP cycle is illustrated in Figure 11–10.
Programming flexibility enables this unit to
be used for the operation of a wide variety
of CIP systems. The principle involved with
this innovation is that a graphic recording of
the CIP unit is provided to monitor operat-
ing parameters, including supply and return
temperature, pressure, flow, pH, and con-
ductivity. This equipment can spread the
data out in detailed chronological graphic
form for temperature, return velocity, and
solution concentration. Items such as valve
pulsings, pump cavitation, and program
steppings can be charted and documented,
which are not clearly visible in normally
chronological CIP recording charts. There-
fore, this feature is a valuable tool for CIP
monitoring, documentation, and mainte-
nance.
Computer-based CIP monitoring equip-
ment contains a control panel equipped with
a display for the operator. However, primary
monitoring is performed through printed
records of CIP performance. The printer can
produce a series of strip charts. On each
chart, a graph of time is plotted against a
corresponding CIP parameter. The unit is208 PRINCIPLES OFFOODSANITATION
Figure 11–10Instrumentation that regulates and
documents a CIP cycle. Courtesy of Johnson
Diversey, Inc., Detroit, Michigan.