34 CI/FCB300/FCH300-EN Rev. F | CoriolisMaster FCB330, FCB350, FCH330, FCH350
6.7.4 Process sealing
According to „North American Requirements for Process
Sealing between Electrical Systems and Flammable or
Combustible Process Fluids“
IMPORTANT (NOTE)
Equipment for use in Canada, Class II,
Groups E, F and G shall be limited to a maximum
surface temperature of 165°C (329 °F).
Seal all conduits within 18 inches (457.20 mm).
The flow meters from ABB are designed for the world wide
industrial market and are suitable to measure among others
flammable and combustible process fluids and are installed
within a process pipe.
Among others the instruments are connected to an electrical
system via a conduit system which is able to allow the
migration of process fluids directly into the electrical system.
To avoid the migration of process fluids the instruments has a
process seal which meet the requirements of
ANSI/ISA 12.27.01.
The Coriolis Flowmeters are designed as a “single seal
device”.
In accordance to the requirements of ANSI/ISA 12.27.01 the
existing operating rates of temperature, pressure and liner
types have to reduce to the following limits:
Flange or tube Material All materials of the existing model
number
DN 20 ... 150 (1/2” ... 6”)
Usable Operating Temperature -50 °C ... 200 °C (-58 °F ... 392 °F)
Chan ge from tw o to one c olum n
6.7.5 Changing the type of protection
The FCB330/350, FCH330/350 and FCT330/350 models can be operated in different types of protection:
— When connected to an intrinsically safe circuit in Div. 1, operated as an intrinsically safe device (IS)
— When connected to a non-intrinsically safe circuit in Div. 1, operated as a device with a explosionproof enclosure (XP)
— When connected to a non-intrinsically safe circuit in Div. 2, operated as a non-incendive device (NI)
If a device which is already installed is required to provide a different type of protection, the following measures must be
implemented/inspections must be performed in accordance with applicable standards.
1. Type of protection 2. Type of protection Required step/check
Housing: XP, U
max
= 60 V
Outputs non IS
Housing: XP
Outputs: IS
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing. When this
test is performed, no voltage flashover is permitted in or on the device.
— Visual inspection, particularly of the electronic circuit boards
—
Visual inspection: No damage or explosion can be detected.
Housings: Div 2
Outputs: NI
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing. When this
test is performed, no voltage flashover is permitted in or on the device.
— Visual inspection, particularly of the electronic circuit boards
—
Visual inspection: No damage or explosion can be detected.
Outputs: IS
Housing: XP
Housing: XP
Visual inspection: No damage to the threads (cover, 1/2" NPT cable glands)
Housing: XP
No special measures
Housing: XP, U
max
= 60 V
Outputs: NI
Housing: XP
Outputs: IS
— 500 V AC/1 min or 500 x 1,414 = 710 V DC/1 min
test between terminals 31 / 32, 33 / 34, 41 / 42, 51 / 52, 81 / 82 and / or 97 / 98 and
terminals 31, 32, 33, 34, 41, 42, 51, 52, 81, 82, 97, 98 and the housing.When this test
is performed, no voltage flashover is permitted in or on the device.
— Visual inspection, particularly of the electronic circuit boards
—
Visual inspection: No damage or explosion can be detected.
Housing: XP
Outputs: non IS
Visual inspection: No damage to the threads (cover, 1/2" NPT cable glands)
Chan ge from on e to two c olumns