ABB SensyMaster FMT430 - Electrical Connections; Process Sealing

SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B 19
Electrical connections
Note
The temperature at the cable entries of the device depends on
the design, the measuring medium temperature T
medium
and the
ambient temperature T
amb.
.
For the electric connection of the device, use only cables with
sufficient temperature resistance in accordance with the tables
at Temperature resistance for the connecting cable on page 10.
Grounding
The sensor must be grounded in accordance with the applicable
international standards.
Perform grounding of the device in accordance with Pin
assignment on page 56.
In accordance with NEC standards, an internal ground
connection is present in the device between the sensor and the
transmitter.
Perform grounding of the device in accordance with Pin
assignment on page 56.
Process sealing
In accordance with ‘North American Requirements for Process
Sealing between Electrical Systems and Flammable or
Combustible Process Fluids’.
Note
The device is suitable for use in Canada.
• For use in Class II, Groups E, F and G, a maximum surface
temperature of 165 °C (329 °F) may not be up-scaled.
• All cable (conduits) should be sealed from the device within a
distance of 18 in (457 mm).
ABB flowmeters are designed for the worldwide industrial
market and are suitable for functions such as the measurement
of flammable and combustible liquids and can be installed in
process pipes.
Connecting devices with cable (conduits) to the electric
installation makes it possible for measuring media to reach the
electric system.
To prevent measuring media from seeping into the electric
installation, the devices are equipped with process gaskets
which meet requirements in accordance with ANSI / ISA 12.27.01.
SensyMaster flowmeters are designed as ‘Dual Seal Devices’.
In accordance with the requirements of standard
ANSI / ISA 12.27.01, the existing operating limits of temperature,
pressure and pressure bearing parts must be reduced to the
following limit values:
Limit values
Flange or pipe material
No limitations
Nominal sizes
DN 25 to DN
2000
(1 to 78 in)
Operating temperature
−20 °C to 280
°C
(−4 °F to 536
°F)
Process pressure
PN 40 / Class 300