Service manual

MDS E-SCAN MPR E-SCAN /INSTALLATION
10
The adapter should be oriented to place the head in a horizontal plane to assure that
deposit buildup and air pocket creation will be minimal.
The nut should be tightened with a wrench (supplied by EMC) to a maximum 50 foot
pounds of torque (68 Newton-Metre). Alignment marks are provided to ensure that the
thermistor probe will not be in a direct line of the steam blast. (See Sensing Head to
Adapter Positioning)
1.3 Installation of Sensing Heads
The sensing heads are attached to the process line
by Isolation Valves. These adapters must not be
placed in an area where vibration is severe or
excessive. They should be installed a minimum of
six feet apart to prevent interaction of the purges.
If the sensing head is to be mounted on a vertical pipe, the fluid
flow should be upward. The arrow on the adapter should point in
the direction of fluid flow. (See Sensing Head to Adapter
Positioning.) 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 small amount of desiccant to absorb any moisture
remaining in the head after assembly. The sight glass on the head allows inspection of the
desiccant. Sensing heads manufactured after June of 2006 use a RoHS compliant desiccant that
is light orange when effective and clear when no longer effective. The desiccant can be renewed
by heating to approximately 250° F (121°C) until it recovers its original color.
This o
-
ring must be in place prior to installing the head
into the adapter to prevent the process leaking out.
Sensing Head