Installation / Disassembly In Connection With The Changing Device - ABB SensyMaster FMT230 Commissioning Instruction

SENSYMASTER FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. A
4.5.2 Installation / Disassembly in connection with the
changing device
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 changing device 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 changing device 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 fastening screws.
— Drain and rinse the piping before disassembling the
sensor, check and repair the changing device.
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 ensured during
disassembly of the sensor.
NOTICE
Damage to the changing device
Using tools or other devices to operate the lock nut can
damage the hot tap fitting.
Only ever operate the lock nut manually.
Fig. 15: Sensor process connection
1 O-Ring 2 Connection flange 3 Centering pin 4 Screws to
secure the guiding pipe 5 union nut
Fig. 16: Sensor Installation / Disassembly
A Integrated changing device in disassemble position B integrated
changing device in measurement position
1 Sensor 2 Protection cap 3 Union nut in disassemble position
4 Union nut in measurement position 5 Special screws for
protection cap
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