KROHNE UFM 800 EN - Manual (Page 8)

12/2000 Installation and operating instructions UFM 800 W / UFM 800 C 8
6.0 Mounting of the sensors
● Mark the connection box of sensors 1 and 4 with a "P”, mark the connection box of sensors 2 and 4 with a "N” (See Drawing 2).
● Clean the inside of the sensor holder using acetone and dry with compressed air.
● Clean the piezo crystal.
● Glue the crystal to the cupper sheet at the front end of the piezo guiding, using the acoustic coupling grease.
NOTE:
With a "P” type sensor: the crystal side marked with a green dot must face the piezo guiding.
With a "N” type sensor: the crystal side marked with a green dot must NOT face the piezo guiding.
● Install the insulation ring around the crystal.
● Put 3 drops of Silicon Oil AK 2000 to the free face of the crystal. Make sure no air-bubbles remain on the crystal or in the oil.
● Slide the holder with crystal to the housing.
● Try to direct the holder into the right direction.
● Fasten the holder with the spring-loaded washer and nut.
● Click the cable connector to the sensor.
● Match the cable numbers to the sensor numbers according to Drawing 1 or 2.
7.0 Cabling, connection, final mounting
Connect the sensor cables to the corresponding sensors (numbering) on one side and to the square pipe on the other side:
Drawing 7: Sensor cable with Anaconda protecting hose. 1. Anaconda Sealtite armoured hose
with nut, sealing and insert, pre-mounted, 2. Silicon protection (glass fiber reinforced), 3. coaxial
signal cable, 4. Label with sensor number, 5. cable gland, 6. SMB connector
● Feed the SMB-connector (6) through the threaded hole in the sensor body and screw the cable gland (5) in the sensor body and tighten
vigorously. Connect the SMB-connector to the electrical connection plug. Place the Anaconda hose on the cable gland and screw the nut
(it can rotate over the sealing). Tighten it vigorously. The sealing must come out of the gland to ensure watertight mounting.
● Screw the covers (1) on the sensors with the closing O-ring (7) (Drawing 3). Apply a little grease on the O-ring and take care that the O-ring is
well placed and not damaged by the thread, to establish a good environmental protection (IP 65/68). The cover must be screwed until the
O-ring is no longer visible and tightened.
● Feed the SMB-connector on the opposite side through the hole in the square pipe and connect the Anaconda hose as described above to the
square pipe.
● Fix the connection box on the square pipe, while placing the silicon gasket and connect SMB-connectors of the sensor cables to the print in
the connection box.
● Fix the connection print in the connection box.
● Mount the signal converter to the wall with its wall mounting support.