Operating Instructions; Protection Against Electrostatic Discharges; Repair; Changing The Type Of Protection - ABB CoriolisMaster FCB400 Series Manual

26 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!

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
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(ib) / IS design
New installation
Zone 1 / Div. 1:
Current outputs and digital outputs in
intrinsically safe ia / IS design
Zone 1 / Div. 1:
Current outputs and digital outputs in
non-intrinsically safe design
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.
Necessary test steps
• 500 V AC/1min or 500 × 1.414 = 710 V DC/1min
Test between terminals A / B, U
V1 / V2 and V3 / V4, and terminals A, B, U
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.
• Visual inspection, no damage visible on the threads (cover, ½ in NPT cable
glands).
, /GND, U / 32, 31 / 32, 41 / 42, 51 / 52,
FE CO
, GND, U , 31, 32, 41, 42, 51, 52,
FE CO