Opening And Closing The Housing - ABB SensyMaster FMT230 Commissioning Instruction

18 SENSYMASTER FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. A
Installation of the sensor during operation
NOTICE
The changing device must be in the disassemble position
before disassembling the sensor, the sensor process
connection is sealed.
Installing the sensor:
1. Place the supplied O-ring in the groove of the sensor
connection flange.
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 flange 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 changing device is 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).

4.6 Opening and closing the housing

WARNING
Risk of injury due to live parts!
When the housing is open, contact protection is not provided
and EMC protection is limited.
Before opening the housing, switch off the power supply.
Fig. 17: Cover safety device (example)
To open the housing, release the cover safety device by
screwing in the Allen screw
After closing the housing, lock the housing cover by unscrewing
the Allen screw 1 .
NOTICE
Potential adverse effect on the IP rating
— Make sure that the cover of the power supply terminals is
mounted correctly.
— Check the O-ring gasket for damage and replace it if
necessary before closing the housing cover.
— Check that the O-ring gasket is properly seated when
closing the housing cover.
1 .