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FMT230, FMT250
THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
… 6 Installation
… Installing the sensor
Installation / Disassembly in connection with the hot tap fitting
DANGER
Danger to life due to piping under pressure!
If the changing device is in the measurement position during
disassembly of the sensor, this may pose a danger to life due
to the possibility of the sensor being ejected.
• Disassemble the sensor only if the hot tap fitting is in the
disassemble position.
DANGER
Danger to life due to leaking measuring medium!
If the changing device is in the measurement position during
disassembly of the sensor or gaskets in the changing device
are damaged, leaking measuring medium may pose a danger
to life.
• Make sure that the hot tap fitting is in the disassemble
position.
• If measuring medium should start to leak in spite of this,
immediately stop disassembly of the sensor and tighten
the fixing screws.
• Drain and rinse the piping before disassembling the
sensor, check and repair the hot tap fitting.
CAUTION
Risk of injury due to leaking measuring medium!
When you disassemble the transmitter, small quantities of
measuring medium may leak due to the nature of the design.
• Make sure that sufficient ventilation is guaranteed during
disassembly of the sensor.
NOTE
Damage to the changing device
Using tools or other devices to operate the lock nut can
damage the hot tap fitting.
• Operate the union nut by hand only.
1
O-ring
2
Sensor connection
3
Centering pin
4
Screws for securing the guide
tube
5
Union nut
Figure 24: 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
2
Protection cap
3
Union nut in disassembly position
4
Union nut in measurement position
5
Special screws for protection cap
Figure 25: Sensor installation and disassembly
