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SensyMaster FMT230, FMT250
THERMAL MASS FLOWMETER | OI/FMT230/250-EN REV. C
… 6 Installation
Assembly of the welding adapter with hot tap fitting
DANGER
Explosion hazard
Explosion hazard during installation or operation of the
integrated hot tap fitting in potentially explosive
atmospheres of Zone 0.
• Install and operate the integrated hot tap fitting only
outside of potentially explosive atmospheres or in Zone 2
/ Div.2 or Zone 1 / Div. 1.
Wafer type design
Installation of the wafer type design is performed as explained in
Wafer type design (FMT091) and partial measuring section
(FMT092)
on page 27.
Explosion protection approval
The integrated hot tap fitting is approved for use in potentially
explosive atmospheres of ATEX/IECEx/UKCA Zone 1 and Zone 2
or cFMus Div. 1 and Div. 2.
Use in Zone 0 is not permitted!
Measured medium temperature
Refer to
Measured medium temperature
on page 25.
Welding design
DANGER
Danger to life!
Danger to life caused by changes to the hot tap fitting. This
can lead to the measuring medium escaping in an
uncontrolled manner.
• Do not shorten hot tap fitting components or interfere
with the design.
The welding version of the integrated changing device is
available in two installation lengths:
• for nominal diameters DN 100 to 125 (4 to 5 in) and
• for nominal diameters DN 150 to 300 (6 to 12 in).
Note
• The
sensor
length
h
is 425 mm (16.73 in) respectively.
• The
installation
depth
Y
depends on the pipe diameter and
must be calculated individually.
1
Sensor
2
Centering pin
3
Flow direction
Figure 25: Integrated hot tap fitting in measurement position, dimensions in mm (in)