40
SensyMaster FMT230, FMT250
THERMAL MASS FLOWMETER | OI/FMT230/250-EN REV. C
… 6 Installation
… Installation / Disassembly of the sensor in connection with the hot tap fitting
Disassembly of the sensor
DANGER
Danger to life due to leaking measuring medium!
Depending on the pressure in the piping, up to one liter of
measuring medium can escape during disassembly of the
sensor.
• Make sure that no hazardous atmosphere results from the
escaping medium.
• Use safety equipment appropriate to the medium
(poisonous, explosive, flammable, corrosive, toxic, etc.)
DANGER
Danger to life!
Danger to life due to leaking measuring medium from the
disassembled sensor and the piping in operation.
• Secure the hot tap fitting against unintended use with a
blind flange.
• Attach a warning label.
Initial position
Figure 29: Integrated hot tap fitting in measurement position
The integrated hot tap fitting is in the measurement position,
the sensor element fully protrudes in the piping cross-section.
Disassembly of the sensor
Figure 30: Setting the integrated hot tap fitting in disassembly position
1.
Disconnect the electrical connections on the sensor.
2.
Turn the sensor with the union nut
1
in the disassembly
position. The lower edge of the union nut indicates the
position of the sensor. The sensor will not be in the
disassemble position
0 - CLOSE - ZU
and the hot tap fitting
will not be gasketed from the process
2
until the
disassembly position is reached (the upper limit stop of the
union nut).
Figure 31: Loosening the cap nuts of the protection cap
3. Screw off the cap nuts
1
and washers of the protection cap.