MPR
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CAN
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NSTALLATION
This o-ring must be in place prior to installing the head into the adapter to prevent the process
leaking out.
The nut should be tightened with a wrench (supplied by EMC) to a maximum 50 foot-pounds
of torque (68 Newton-Meter).
Alignment marks are provided for units utilizing a steam purge cleaning cycle to ensure that
the thermistor probe will not be in a direct line of the steam blast. (See drawing below.)
In applications where the product may solidify
at ambient temperature, a check valve must be
installed onto the steam port.
Steam purge time must be kept at a minimum typically from 1 to 10 seconds duration, to avoid
excessive prism deterioration, while at the same time keeping the intervals between these purge
times at maximum, which may vary from minutes to many hours.
The probe end of the sensing head has a groove for an interface o-ring.
The head is attached to the adapter by a 2-inch sanitary nut.
The sensing head houses optical components which are susceptible to the effects of moisture.
The cover is moisture proof and contains a desiccant to absorb any moisture remaining in the
head after assembly. The sight glass on the head allows inspection of the desiccant. Light
orange indicates that it remains effective. Clear indicates it is no longer effective and must be
changed. The desiccant can be renewed by heating to approximately 250° F (121° C) until it
recovers its orange color.
1.4 Steam Purge Attachment
Steam Purge Attachment- for liquids
which exhibit a tendency to "coat"
The steam purge valve must be similarly
mounted to the adapter with a minimum of 6"
and a maximum of 18" from the steam port on
an adapter preferably with 1/4" tubing.
Steam pressure must be at least 50 psi (3.44 bar)
above process pressure with adequate
condensate drainage at the steam valve in order
to ensure hot steam for cleaning the prism. Trial
and error must, of necessity, be employed in
determining the minimum steam time necessary
for proper steam cleaning of the prism due to
variables from application to application.
Contact Electron Machine for more information.
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