Operation Manual

8-8
IM 1F5B2-01E
Accessories for Sensor Replacement (provided separately)
Sensor
assembly
Allen wrench Silicon compound O-ring
(2) Mounting a Sensor Assembly
When mounting a new sensor assembly for replacement, follow the procedure described
below.
<1> Make sure the stainless-steel tubing of the new sensor assembly fits properly into
the grooves on the body. (The tubing is preformed when shipped. If it does not fit
properly, however, reshape it so it fits into the grooves perfectly.)
<2> Using an organic solvent, clean the bottom surfaces of the sensor holders and the
surfaces of the body where the sensor holders are being mounted.
<3> Engage the metal ring with each sensor holder from the bottom surface of the
holder. Fit the O-ring coated with a uniform film of grease into the groove on one
side of the holder. At this point, exercise care to prevent the bottom surface of the
holder from getting grease on it.
CAUTION
• Exercise care to prevent the surfaces where the emitter/detector of the sensor assem-
bly are mounted from becoming damaged or contaminated with dust.
<4> Loosen the two setscrews on the plate beforehand with the supplied tool.
<5> Coat the middle of the emitter/detector’s bottom surface with an adequate amount
of silicon compound.
<6> Place the emitter/detector in the approximate middle of the sensor-mounting
surface on the body.
<7> Engage the projection of the plate with the hole (concave spot) on the back of the
sensor holder to position the plate in place.
<8> Fasten the plate with the four screws.
<9> After having fastened the plate, fasten the two setscrews to pressurize the metal
ring so the O-ring comes into tight contact with the body.
<10>For reassembly of parts other than the sensor assembly, follow these steps in the
reverse order of disassembly.