ABB SensyMaster FMT430 Operating Instructions Manual page 45

SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
1 O-ring
2 Sensor connection
3 Centering pin
Figure 29: Sensor connection on the hot tap fitting
A Integrated hot tap fitting in
disassembly position
B Integrated hot tap fitting in
measurement position
1 Sensor
Figure 30: Sensor installation and disassembly
4 Screws for securing the guide
tube
5 Union nut
2 Protection cap
3 Union nut in disassembly position
4 Union nut in measurement position
5 Special screws for protection cap
Installation of the sensor during operation
Note
The changing device must be in the disassembly position before
disassembling the sensor, the sensor connection is sealed.
Installing the sensor:
1. Place the supplied O-ring in the groove of the sensor
connection.
2. Carefully slide the sensor into the changing device.
Observe correct alignment to the centering pin in the
process.
3. Fasten the sensor to the sensor connection using screws.
Use the supplied M12 screws, as well as two extended
special screws for this.
4. Place the protection caps onto the special screws and
tighten using two nuts.
5. Twist the transmitter with the union nut into the
measuring position. The lower edge of the union nut
indicates the position of the sensor. Only when the
measuring position is reached 50 - OPEN - MESSEN (the
lower limit stop of the union nut) will the sensor be in the
middle of the piping and precise values can be provided.
6. Carry out the electrical connection
Disassembly of the sensor during operation
Disassembly of the sensor:
1. Twist the transmitter with the union nut into the
disassemble position. The lower edge of the union nut
indicates the position of the sensor. Only when the
disassemble position is reached 0 - CLOSE - ZU (the
upper limit stop of the union nut) will the sensor be in the
disassemble position and the hot tap fitting sealed off
from the process.
2. Disconnect electrical connections.
3. Remove protection caps.
4. Remove flange screws.
5. Carefully pull the sensor out of the changing device (do
not tip to the side).
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