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CoriolisMaster FCB400, FCH400
CORIOLIS MASS FLOWMETER | CI/FCB400/FCH400-EN REV. H
… 2 Use in potentially explosive atmospheres
Operating instructions
Protection against electrostatic discharges
DANGER
Risk of explosion!
The painted surface of the device can store electrostatic
charges.
As a result, the housing can form an ignition source due to
electrostatic discharges in the following conditions:
• The device is operated in environments with a relative
humidity of
≤
30 %.
• The painted surface of the device is thereby relatively free
from impurities such as dirt, dust or oil.
• Instructions on avoiding ignition in potentially explosive
environments due to electrostatic discharges in
accordance with PD CLC/TR 60079-32-1 and IEC TS 60079-
32-1 must be complied with!
Instructions on cleaning
The painted surface of the device must be cleaned only using a
moist cloth.
Devices which are approved for use in potentially explosive
atmospheres have an additional warning plate.
1
WARNING!
– Danger due to electrostatic discharge.
Figure 2: Additional warning plate
Repair
Devices of type of protection ‘d’ are equipped with flameproof
joints in the housing. Contact ABB before commencing repair
work.
Changing the type of protection
If you are installing in Zone 1 / Div. 1, the current outputs and digital outputs of models FCB430/450 and FCH430/450 can be
operated with different types of protection:
• Current output and digital output in the ‘intrinsically safe ia / IS’ design
• Current output and digital output in non-intrinsically safe design
If a device that is already operational is operated with a different type of protection, the following measures must be
implemented/insulation checks performed in accordance with applicable standards.
Original installation
New installation
Necessary test steps
Zone 1 / Div. 1:
Current outputs and digital outputs in
non-intrinsically safe design
Zone 1 / Div. 1:
Current outputs and digital outputs in
intrinsically safe ia / IS design
• 500 V AC/1min or 500 × 1.414 = 710 V DC/1min
Test between terminals A / B, U
FE
, /GND, U
CO
/ 32, 31 / 32, 41 / 42, 51 / 52,
V1 / V2 and V3 / V4, and terminals A, B, U
FE
, GND, U
CO
, 31, 32, 41, 42, 51, 52,
V1, V2, V3, V4 and the housing.
When this test is performed, no voltage flashover is permitted in or on the
device.
• Optical evaluation particularly of the electronic circuit boards, no visible
damage or evidence of explosion.
Zone 1 / Div. 1:
Current outputs and digital outputs in
intrinsically safe ia(ib) / IS design
Zone 1 / Div. 1:
Current outputs and digital outputs in
non-intrinsically safe design
• Visual inspection, no damage visible on the threads (cover, ½ in NPT cable
glands).
